ATOC 4720: class 6: Winds ATOC 4720: class 6: Winds and precipitationand precipitation
1. Winds1. Winds Scales of motionsScales of motions Longitudinally averaged zonal Longitudinally averaged zonal
windswinds Tropospheric winds at different Tropospheric winds at different
latitudeslatitudes 2. Precipitation2. Precipitation
Class 5: The temperature distribution and Class 5: The temperature distribution and its measurementits measurement
80% massAll water(homo or heter?)
Sharp dropIn water
1. Winds in the earth’s 1. Winds in the earth’s atmosphereatmosphere
Spatial scales of motion: Spatial scales of motion: (1) Planetary-scale; (1) Planetary-scale; (2) Synoptic-scale (~a few hundreds of (2) Synoptic-scale (~a few hundreds of
km); km); (3) Meso-scale (a few tens of (3) Meso-scale (a few tens of
KM~hundreds km); KM~hundreds km); (4) Small-scale (< a few 10km). (4) Small-scale (< a few 10km).
Planetary scale winds: zonal Planetary scale winds: zonal meanmean
Winds in tropical stratosphere Winds in tropical stratosphere
Winds in troposphere: middle Winds in troposphere: middle & high latitudes& high latitudes
Surface PressureSurface Pressure
Winds in the tropicsWinds in the tropics
Easterly wave Perturbation Easterly wave Perturbation
Asian-summer monsoonAsian-summer monsoon
2. Precipitation2. Precipitation
Precipitation JanuaryPrecipitation January
JulyJuly