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Cloud PhysicsYuan Wang
Quiz:What properties/quantities of an air parcel(unsaturated) below are unchanged/conservedduring its uplifting following adiabatic processes ?Chemical compositionsPressureDensityTemperatureWater vaper mixing ratioWater vaper pressureSaturation vaper pressurePotential temperature
Artificial MapReal Image(Taken by a lunar orbiter )
Suomi NPP Earth Satellite(Taken on Nov 11, 2011)
Cloud PhysicsWhat is a cloud?How to form clouds?How cloud grow and develop to rain?Why important?
B. Cumulonimbus“Heavy and dense cloud with a vertical extension and in the form of a mountain orhuge towers”. It always indicates a strong instability.
A. StratocumulusB. StratusC. Cirrus(Hint: Top-down view from satellite image over the open ocean)?
A. Stratocumulus“Grey or whitish low stratus but has clearly identifiable elements”. It may coverregions ~1000 km in horizontal scale.
Net Cloud Radiative Effect (W/m2)High clouds – warmingLow clouds – coolingGlobal Mean: -28 W/m2
Cloud Radiative Effect
Key element to form liquid cloud²Supersaturation1) Radiative Cooling2) Mixing3) Uplifting

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Water vapor, A Stratocumulus

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