Dedication |
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v | |
Preface |
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xiii | |
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xv | |
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1 Types of Clouds in Earth's Atmosphere |
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3 | (22) |
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1.1 Atmospheric Structure and Scales |
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3 | (1) |
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1.2 Cloud Types Identified Visually |
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4 | (12) |
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1.2.1 Genera, Species, and Etages |
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4 | (2) |
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6 | (4) |
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10 | (2) |
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12 | (1) |
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13 | (3) |
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16 | (1) |
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1.3 Precipitating Cloud Systems |
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16 | (4) |
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1.3.1 Mesoscale Convective Systems |
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17 | (1) |
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17 | (1) |
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1.3.3 Extratropical Cyclones |
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18 | (2) |
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1.4 Satellite Cloud Climatology |
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20 | (5) |
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25 | (22) |
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25 | (2) |
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25 | (1) |
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25 | (1) |
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2.1.3 Thermodynamic Equation |
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25 | (1) |
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26 | (1) |
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26 | (1) |
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2.1.6 The Full Set of Equations |
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27 | (1) |
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27 | (2) |
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2.2.1 Quasigeostrophic Motion |
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27 | (1) |
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2.2.2 Semigeostrophic Motions |
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27 | (1) |
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2.2.3 Gradient Wind Balance |
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28 | (1) |
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2.2.4 Hydrostatic Balance |
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29 | (1) |
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29 | (1) |
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2.2.6 Cyclostrophic Balance |
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29 | (1) |
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2.3 Anelastic and Boussinesq approximations |
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29 | (2) |
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31 | (1) |
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31 | (1) |
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2.6 Perturbation Forms of the Equations |
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32 | (1) |
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2.6.1 Average and Perturbation Forms of the Equation of State and Continuity Equation |
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32 | (1) |
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2.6.2 Flux Forms and Linearization of the Thermodynamic and Water-Continuity Equations |
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32 | (1) |
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2.6.3 Flux Form and Linearization of the Equation of Motion |
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33 | (1) |
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2.6.4 Eddy Kinetic Energy Equation |
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33 | (1) |
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2.7 Oscillations and Waves |
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33 | (3) |
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2.7.1 Buoyancy Oscillations |
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33 | (1) |
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34 | (1) |
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2.7.3 Inertial Oscillations |
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35 | (1) |
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2.7.4 Inertio-Gravity Waves |
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36 | (1) |
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2.8 Adjustment to Geostrophic and Gradient Balance |
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36 | (2) |
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38 | (6) |
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2.9.1 Buoyant, Inertial, and Symmetric Instabilities |
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38 | (2) |
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2.9.2 Kelvin--Helmholtz Instability |
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40 | (2) |
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2.9.3 Rayleigh--Benard Instability |
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42 | (2) |
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2.10 Representation of Eddy Fluxes |
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44 | (1) |
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44 | (1) |
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2.10.2 Higher Order Closure |
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45 | (1) |
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2.10.3 Large Eddy Simulation |
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45 | (1) |
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2.11 The Planetary Boundary Layer |
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45 | (2) |
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45 | (1) |
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2.11.2 Boundary-Layer Stability |
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46 | (1) |
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46 | (1) |
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47 | (30) |
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3.1 Microphysics of Warm Clouds |
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47 | (7) |
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3.1.1 Nucleation of Drops |
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47 | (2) |
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3.1.2 Condensation and Evaporation |
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49 | (1) |
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3.1.3 Fallspeeds of Drops |
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50 | (1) |
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3.1.4 Continuous Collection |
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51 | (1) |
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3.1.5 Stochastic Collection |
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52 | (1) |
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3.1.6 Spontaneous and Collisional Breakup of Drops and Modification of the Stochastic Collection Formulation |
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53 | (1) |
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3.2 Microphysics of Cold Clouds |
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54 | (11) |
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3.2.1 Homogeneous Nucleation of Ice Particles |
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54 | (1) |
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3.2.2 Heterogeneous Nucleation and Other Processes Forming Small Ice Particles in Clouds |
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55 | (2) |
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3.2.3 Vapor Deposition and Sublimation |
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57 | (1) |
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3.2.4 Aggregation and Riming |
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58 | (2) |
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60 | (1) |
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61 | (1) |
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3.2.7 Fallspeeds of Ice Particles |
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62 | (2) |
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64 | (1) |
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3.3 Types of Microphysical Processes and Categories of Water Substance in Clouds |
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65 | (2) |
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3.4 Water-Continuity Equations |
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67 | (1) |
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3.5 Bin Water-Continuity Models |
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68 | (2) |
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68 | (1) |
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3.5.2 Bin Modeling of Warm Clouds |
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68 | (1) |
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3.5.3 Bin Modeling of Cold Clouds |
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69 | (1) |
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3.6 Bulk Water-Continuity Models |
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70 | (5) |
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3.6.1 The Classic Kessler Approach to Bulk Water-Continuity Modeling of Warm Precipitating Clouds |
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70 | (2) |
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3.6.2 Multimoment Bulk Water-Continuity Modeling of Warm Clouds |
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72 | (2) |
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3.6.3 Bulk Modeling of Cold Clouds By Extending the Kessler Scheme |
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74 | (1) |
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3.7 Water-Continuity Modeling of Cold Clouds Using Generalized Mass-Size and Area-Size Relations |
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75 | (2) |
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4 Remote Sensing of Clouds and Precipitation |
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77 | (24) |
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4.1 Absorption, Scattering, and the Microwave Domain |
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78 | (1) |
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4.2 Passive Microwave Sensing of Precipitation |
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79 | (1) |
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4.3 Radar Sensing of Clouds and Precipitation |
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80 | (2) |
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4.4 Radar Reflectivity from Returned Power |
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82 | (2) |
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84 | (2) |
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4.5.1 Parameters Measured by Dual-Polarization Radar |
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84 | (1) |
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4.5.2 Identification of Hydrometeor Type with Dual-Polarization Radar |
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85 | (1) |
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4.6 Relating Radar Measurements to Hydrometeor Concentration, Precipitation, Fall Velocity, and Cloud-System Structure |
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86 | (2) |
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4.6.1 Particle-Size Method |
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86 | (1) |
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87 | (1) |
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4.6.3 Polarimetric Improvement of Rain Estimation |
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88 | (1) |
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4.7 Estimating Areal Precipitation from Radar Data |
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88 | (1) |
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4.8 Determining Cloud Morphology from Radar Data |
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89 | (1) |
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89 | (12) |
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90 | (1) |
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4.9.2 Velocity and Range Folding |
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91 | (1) |
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4.9.3 Vertical Incidence Observations |
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91 | (1) |
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92 | (1) |
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4.9.5 Velocity-Azimuth Display Method |
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92 | (2) |
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4.9.6 Multiple Doppler Synthesis |
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94 | (1) |
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4.9.7 Retrieval of Thermodynamic and Microphysical Variables |
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95 | (6) |
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5 Clouds in Shallow Layers at Low, Middle, and High Levels |
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101 | (40) |
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5.1 Fog and Stratus Occurring in a Boundary Layer Cooled from Below |
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101 | (10) |
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5.1.1 General Considerations |
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101 | (1) |
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5.1.2 Turbulent Mixing in Fog |
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102 | (2) |
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104 | (4) |
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5.1.4 Arctic Stratus and Stratocumulus |
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108 | (3) |
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5.2 Stratocumulus Forming in Boundary Layers Heated from Below |
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111 | (13) |
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111 | (1) |
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5.2.2 Conceptual Model of the Formation of a Cloud Topped Mixed Layer |
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112 | (2) |
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5.2.3 Mathematical Modeling of Cloud Topped Mixed Layer Formation |
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114 | (4) |
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5.2.4 Stratocumulus with Drizzle |
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118 | (1) |
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5.2.5 Later Stages of the Stratocumulus Lifecycle |
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118 | (1) |
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5.2.6 Cellular Structures and Patterns in Stratocumulus Fields |
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118 | (2) |
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5.2.7 Boundary Layer Rolls and Cloud Streets |
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120 | (4) |
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5.3 Altostratus and Altocumulus |
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124 | (3) |
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5.3.1 Altostratus and Altocumulus Produced as Remnants of Other Clouds |
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124 | (1) |
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5.3.2 Altocumulus as High Based Convective Clouds |
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125 | (1) |
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5.3.3 Altostratus and Altocumulus as Shallow Layer Clouds Aloft |
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125 | (2) |
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5.3.4 Ice Particle Generation By Altocumulus Elements |
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127 | (1) |
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5.3.5 Interaction of Altocumulus and Lower Cloud Layers |
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127 | (1) |
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127 | (14) |
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127 | (1) |
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5.4.2 Climatology and Origins of Cirriform Clouds |
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128 | (2) |
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5.4.3 Microphysics, Vertical Air Motions, and Radiation Cirriform Clouds |
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130 | (2) |
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5.4.4 Small Cirriform Convective Elements---"Generating Cells" |
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132 | (1) |
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5.4.5 Buoyant Anvil Dynamics |
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133 | (4) |
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5.4.6 Radiative Destabilization and Shear Effects on a Layer of Cirriform Cloud |
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137 | (1) |
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5.4.7 Mesoscale Circulation Induced By Radiative Heating of a Layer of Cirriform Cloud |
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138 | (3) |
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6 Nimbostratus and the Separation of Convective and Stratiform Precipitation |
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141 | (24) |
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6.1 Definition of Stratiform Precipitation and How It Differs from Convective Precipitation |
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142 | (2) |
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6.2 The Contrasting Radar-Echo Structures of Stratiform and Convective Precipitation |
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144 | (2) |
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6.3 Microphysical Observations in Nimbostratus and Implied Vertical Air Motions |
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146 | (1) |
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6.4 Role of Convection in Regions of Stratiform Precipitation |
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147 | (1) |
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6.5 Stratiform Precipitation with Shallow Overturning Convective Cells Aloft |
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147 | (5) |
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6.6 Stratiform Precipitation Produced by Deep Convection |
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152 | (9) |
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6.6.1 Particle Fountains and the Evolution of Deep Convective Cells into Nimbostratus |
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152 | (2) |
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6.6.2 Stratiform Precipitation Produced by Discrete Redevelopment of Deep Convection |
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154 | (2) |
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6.6.3 Stratiform Precipitation Produced by Convective Redevelopment in a Various Wind Shear Environments |
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156 | (1) |
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6.6.4 Microphysics of the Stratiform Precipitation Associated with Deep Convective Clouds |
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157 | (4) |
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6.7 Radiative Effects on Nimbostratus |
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161 | (1) |
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6.8 Separation of Convective and Stratiform Precipitation |
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162 | (3) |
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165 | (22) |
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165 | (1) |
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7.2 The Pressure Perturbation Field Associated with Buoyancy |
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166 | (1) |
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7.3 Entrainment and Detrainment |
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167 | (15) |
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7.3.1 General Considerations |
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167 | (1) |
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7.3.2 Early Views of Mixing with the Cloud's Environment |
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168 | (7) |
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7.3.3 More Realistic Views of Entrainment and Detrainment |
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175 | (1) |
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7.3.4 Effect of Entrainment on Buoyancy and Downward Motion Near Cloud Edge |
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176 | (1) |
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7.3.5 Lateral Versus Cloud-Top Entrainment |
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176 | (1) |
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7.3.6 Convective Cloud in a Fixed Column |
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177 | (3) |
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7.3.7 Representation of Mixing in Multidimensional Models of Convective Clouds |
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180 | (2) |
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7.3.8 Representation of Convective Clouds in Large Scale Models of the Atmosphere |
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182 | (1) |
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7.4 Vorticity and Dynamic Pressure Perturbation Forces |
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182 | (5) |
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7.4.1 The Vorticity Approach to Understanding Rotation and Dynamic Pressure in Convective Clouds |
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182 | (1) |
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7.4.2 Horizontal Vorticity |
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182 | (1) |
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7.4.3 Vertical Vorticity Introduced by Tilting of Environmental Horizontal Vorticity |
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183 | (1) |
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7.4.4 Effects of Vortices on Entrainment and Pressure Perturbation |
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183 | (4) |
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8 Cumulonimbus and Severe Storms |
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187 | (50) |
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8.1 The Basic Cumulonimbus Cloud |
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187 | (3) |
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190 | (4) |
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194 | (4) |
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8.4 Environmental Conditions Favoring Different Types of Deep Convective Storms |
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198 | (5) |
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203 | (5) |
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8.5.1 Storm Splitting and Propagation |
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203 | (1) |
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8.5.2 Directional Shear in the Environment of the Cumulonimbus Cloud |
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204 | (1) |
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205 | (2) |
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8.5.4 Helicity and the Strength of Supercell Updraft Rotation |
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207 | (1) |
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8.5.5 Baroclinicity Associated with Downdrafts |
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207 | (1) |
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8.5.6 The Three Sources of Rotation in a Supercell |
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207 | (1) |
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8.6 Tornadogenesis in Supercell Storms |
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208 | (2) |
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8.6.1 The Primary Factors Contributing to Tornado Formation in a Supercell |
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208 | (1) |
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8.6.2 Occlusion Downdrafts, the Surface Mesoscyclone, and Vortex Breakdown |
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209 | (1) |
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8.7 Ground Tracks of Supercell Tornadoes |
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210 | (1) |
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8.8 Non-Supercell Tornadoes and Waterspouts |
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211 | (2) |
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213 | (8) |
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8.9.1 Observed Structure and Life Cycle of a Tornado |
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213 | (2) |
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215 | (4) |
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219 | (2) |
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8.9.4 Multiple Vortex Tornadoes |
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221 | (1) |
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8.10 Downbursts and Microbursts |
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221 | (6) |
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8.10.1 Definitions and Descriptive Models |
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222 | (1) |
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8.10.2 Effects of Microbursts on Aircraft |
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223 | (1) |
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8.10.3 Mechanisms Driving Microbursts |
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224 | (3) |
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8.10.4 Downburst Rotor Circulations and Outburst Winds |
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227 | (1) |
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8.11 Gust Fronts, Derechos, and Arcus Clouds |
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227 | (6) |
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8.11.1 Gust Front Phenomena and Nomenclature |
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227 | (1) |
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8.11.2 Gravity Current Dynamics |
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228 | (5) |
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8.12 Lines of Convective Storms |
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233 | (4) |
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9 Mesoscale Convective Systems |
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237 | (50) |
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9.1 General Characteristics |
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237 | (8) |
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9.1.1 Satellite Observed Cloud Tops and the Most Intense MCSs |
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237 | (1) |
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9.1.2 Precipitation and a More General Definition of an MCS |
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237 | (1) |
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238 | (2) |
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9.1.4 Basic Components of an MCS |
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240 | (1) |
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9.1.5 Internal Structures |
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241 | (2) |
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243 | (2) |
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9.2 Leading-Line/Trailing-Stratiform Structure |
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245 | (5) |
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9.2.1 Radar-Echo Structure and Vertical Air Motions |
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245 | (2) |
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9.2.2 Multicellular Structure |
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247 | (1) |
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9.2.3 Forward Overhang, Rear Inflow, and Ascending Front to Rear Flow |
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248 | (1) |
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9.2.4 Precipitation Processes and Trajectories |
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248 | (1) |
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248 | (1) |
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9.2.6 Electrical Structure |
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249 | (1) |
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250 | (8) |
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9.3.1 Layered Mesoscale Airflow |
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250 | (1) |
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9.3.2 Streamlines of Two-Dimensional Steady State Ascent and Descent |
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250 | (4) |
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9.3.3 Wave Interpretations |
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254 | (2) |
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256 | (2) |
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9.4 Details of the Convective Region |
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258 | (10) |
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258 | (1) |
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9.4.2 Pressure-Perturbation Field |
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259 | (2) |
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9.4.3 Thermal and Water-Vapor Perturbations |
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261 | (1) |
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9.4.4 Multicellular Aspect of the Convective Line and Cell Life Cycles |
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262 | (3) |
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9.4.5 Gravity Waves and Interaction with the Stratosphere |
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265 | (1) |
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9.4.6 Bow-Echo Formation and Effects of the Stratiform Region on the Convective Region |
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266 | (2) |
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9.5 Details of the Stratiform Region |
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268 | (13) |
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9.5.1 Upward Air Motion and Precipitation Development in the Stratiform Cloud |
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268 | (4) |
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9.5.2 Thermodynamic Structure of the Stratiform Region |
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272 | (2) |
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9.5.3 The Mesoscale Downdraft |
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274 | (1) |
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9.5.4 Kinematic and Thermodynamic Structure at the Top of the Stratiform Cloud |
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275 | (2) |
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277 | (1) |
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9.5.6 Midlevel Inflow to the Mesoscale Downdraft |
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277 | (4) |
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9.6 Divergence, Diabatic Processes, and Vorticity |
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281 | (6) |
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9.6.1 The Divergence Profile |
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281 | (1) |
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9.6.2 The Distribution of Heating and Cooling |
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282 | (1) |
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282 | (5) |
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10 Clouds and Precipitation in Tropical Cyclones |
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287 | (42) |
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10.1 Definitions, Climatology, and the Synoptic-Scale Contexts of Tropical Cyclones |
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287 | (1) |
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10.2 Clouds Involved in Tropical Cyclogenesis |
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288 | (5) |
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10.2.1 Idealization of the Clouds in an Intensifying Depression |
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288 | (2) |
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10.2.2 Example of a Vortical Hot Tower |
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290 | (1) |
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10.2.3 Ensemble of Clouds in a Developing Storm |
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290 | (1) |
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10.2.4 Cloud Feedback in Cyclogenesis |
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290 | (3) |
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10.3 Overview of the Mature Tropical Cyclone |
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293 | (3) |
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293 | (1) |
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10.3.2 Three-Dimensional Wind Field |
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293 | (2) |
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10.3.3 Equivalent Potential Temperature and Angular Momentum in Relation to the Eye and Eyewall |
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295 | (1) |
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296 | (3) |
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10.5 Dynamics of the Mean Eyewall Cloud |
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299 | (7) |
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10.5.1 Sloping Angular Momentum Surfaces |
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299 | (1) |
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10.5.2 Boundary-Layer Assumptions and Implications |
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300 | (1) |
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10.5.3 Connecting the Balanced Vortex with a Simplified Boundary Layer |
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301 | (1) |
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10.5.4 Thermodynamic Relationships Applied in the Eyewall Region |
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302 | (1) |
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10.5.5 Characteristics of the M Surfaces Above the Boundary Layer |
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302 | (1) |
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10.5.6 Relating M and θe Surfaces in the Eyewall Region to the Top of the Boundary Layer |
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302 | (1) |
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10.5.7 Properties of the Top of Boundary Layer in the Eyewall Region |
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303 | (1) |
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10.5.8 Solutions for the M and θes Surfaces in the Eyewall Cloud |
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304 | (1) |
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10.5.9 Temporal Development and Stability of the Mean Two-Dimensional Eyewall Cloud |
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305 | (1) |
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10.6 Substructure and Asymmetry of the Eyewall Cloud |
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306 | (9) |
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10.6.1 Conditional Instability Within the Eyewall Cloud |
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306 | (2) |
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10.6.2 Eyewall Vorticity Maxima and Strong Updrafts |
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308 | (1) |
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10.6.3 Statistics of Updrafts and Downdrafts in Eyewall Clouds |
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309 | (2) |
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10.6.4 Downdrafts in the Eyewall |
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311 | (1) |
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10.6.5 Eyewall Asymmetry Owing to Storm Motion and Shear |
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312 | (1) |
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10.6.6 Cloud Microphysical Processes in the Eyewall and Inner Core Region |
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313 | (2) |
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10.6.7 Electrification of the Eyewall Cloud |
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315 | (1) |
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10.7 The Region Beyond the Eyewall: Rainbands and Eyewall Replacement |
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315 | (14) |
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10.7.1 The Eyewall/Rainband Complex---An Overview |
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315 | (4) |
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319 | (1) |
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10.7.3 The Principal Rainband |
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319 | (3) |
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10.7.4 Vortex Rossby Waves and Secondary Rainbands |
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|
322 | (3) |
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10.7.5 Eyewall Contraction and Replacement |
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|
325 | (4) |
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11 Clouds and Precipitation in Extratropical Cyclones |
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|
329 | (40) |
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11.1 Structure and Dynamics of a Baroclinic Wave |
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|
330 | (4) |
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11.1.1 Idealized Horizontal and Vertical Structure |
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|
330 | (1) |
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11.1.2 Dynamics Governing Large Scale Vertical Air Motion |
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|
331 | (2) |
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11.1.3 Application of the Omega Equation to a Real Baroclinic Wave |
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|
333 | (1) |
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11.1.4 Low-Level Cyclone Development |
|
|
334 | (1) |
|
11.1.5 Development of the Thermal Pattern in an Extratropical Cyclone |
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|
334 | (1) |
|
11.2 Circulation at a Front |
|
|
334 | (10) |
|
11.2.1 Quasigeostrophic Frontogenesis |
|
|
335 | (2) |
|
11.2.2 Semigeostrophic Frontogenesis |
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|
337 | (3) |
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11.2.3 Moist Frontogenesis |
|
|
340 | (1) |
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11.2.4 Some Simple Theoretical Examples |
|
|
341 | (3) |
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11.3 Horizontal Patterns of Frontal Zones in Developing Cyclones |
|
|
344 | (3) |
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11.4 Clouds and Precipitation in a Frontal Cyclone |
|
|
347 | (16) |
|
11.4.1 Water-Vapor Influx, Atmospheric Rivers, and the Warm Conveyor Belt |
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|
347 | (1) |
|
11.4.2 Satellite Observed Cloud Patterns |
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|
347 | (2) |
|
11.4.3 Distribution of Precipitation Within the Cloud Pattern |
|
|
349 | (3) |
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11.4.4 Narrow Cold Frontal Rainbands |
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|
352 | (3) |
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11.4.5 Wide Cold Frontal Rainbands |
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|
355 | (2) |
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11.4.6 Warm Frontal Rainbands |
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|
357 | (4) |
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11.4.7 Clouds and Precipitation Associated with the Trough of Warm Air Aloft |
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|
361 | (1) |
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11.4.8 Rainbands in the Comma Head of the Occlusion |
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|
362 | (1) |
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11.5 Clouds in Polar Lows |
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|
363 | (6) |
|
11.5.1 Comma-Cloud Systems |
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|
363 | (2) |
|
11.5.2 Tropical Cyclone Dynamics in Cold Airstreams |
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|
365 | (4) |
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12 Clouds and Precipitation Associated with Hills and Mountains |
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|
369 | (34) |
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12.1 Shallow Clouds in Stable Upslope Flow |
|
|
369 | (1) |
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12.2 Wave Clouds Produced by Long Ridges |
|
|
370 | (9) |
|
12.2.1 Flow over Sinusoidal Terrain |
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|
370 | (2) |
|
12.2.2 Flow over a Ridge of Arbitrary Shape |
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|
372 | (1) |
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12.2.3 Clouds Associated with Vertically Propagating Waves |
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|
373 | (1) |
|
12.2.4 Clouds Associated with Lee Waves |
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|
374 | (2) |
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12.2.5 Nonlinear Effects: Large Amplitude Waves, Blocking, the Hydraulic Jump, and Rotor Clouds |
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|
376 | (3) |
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12.3 Clouds Associated with Flow over Isolated Peaks |
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|
379 | (6) |
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12.4 Effects of Mountains and Hills on Precipitation Mechanisms |
|
|
385 | (1) |
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12.4.1 Microphysical Timescale and Terrain Size |
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|
385 | (1) |
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12.4.2 Vapor Pressure of Air Rising over Complex Topography |
|
|
386 | (1) |
|
12.4.3 Dynamics of Airflow Encountering Hills and Mountains |
|
|
386 | (1) |
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12.5 Basic Scenarios by Which Hills and Mountains Affect Precipitating Clouds |
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|
386 | (6) |
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12.5.1 Upslope Flow: Laminar and Overturning |
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|
386 | (2) |
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|
388 | (1) |
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12.5.3 Cloud Layers Moving over Small Terrain Features and the "Seeder-Feeder" Mechanism |
|
|
388 | (2) |
|
12.5.4 Convection Associated with Wave Motions in the Wake of a Hill |
|
|
390 | (1) |
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12.5.5 Blocking Effects on Precipitation |
|
|
390 | (2) |
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12.5.6 Capping and Triggering of Intense Deep Convection |
|
|
392 | (1) |
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12.6 How Major Precipitating Cloud Systems Are Affected by Mountains |
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|
392 | (11) |
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12.6.1 Convective Precipitation and Orography |
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|
393 | (1) |
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12.6.2 Frontal Systems Passing over Mountain Ranges |
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|
394 | (5) |
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12.6.3 Tropical Cyclones Encountering Mountains |
|
|
399 | (4) |
References |
|
403 | (20) |
Index |
|
423 | |