1. What is the dry adiabatic lapse rate (give a number with units)? The cooling and warming of unsaturated air of 10C every 1000 meters or about 5.5F for every 1000 feet.
The rate of change of any meteorological factor with altitude, esp atmospheric temperature, which usually decreases at a rate of 0.6°C per 100 metres (environmental lapse rate). Unsaturated air loses about 1°C per 100 m (dry adiabatic lapse rate), whereas saturated air loses an average 0.5°C per 100 m (saturated adiabatic lapse rate)
2. Is the moist adiabatic rate greater than or less than the dry adiabatic lapse rate?
Less .During saturated ascent, the release of latent heat via condensation partly offsets the ...view middle of the document...
5°C/100 m (5°C/kilometer or 3.3°F/1000 feet). The saturated adiabatic lapse rate does vary with temperature.
5. A stable air stream flows up and over a mountain range. At an elevation of 2000ft on the windward side of the mountain range, the air stream is saturated at a temperature of 10°C. No precipitation falls as the air stream traverses the range. At an elevation of 2000ft on the leeward side of the mountain range (assuming no heating due to sunshine), would the temperature be greater than 10°C?
No. Wind flow perpendicular to the mountain range, or nearly so, being within about 30 degrees of perpendicular.
6. Does a Chinook Wind form in an unstable flow?
No. A strong Chinook can make snow one foot deep almost vanish in one day. The snow partly melts and partly evaporates in the dry wind. Chinook winds have been observed to raise winter temperature, often from below -20°C (-4°F) to as high as 10-20°C (50-68°F) for a few hours or days, then temperatures plummet to their base levels.
7. True or false: the atmospheric temperature profiles associated with the formation of sleet and freezing rain differ mainly in the depth and temperature of the subfreezing layer based at the surface.
True: The rain, falls back into the air that is below freezing but since the depth is shallow, the rain does not have time to freeze into sleet.
8. True or false: the atmospheric temperature profile associated with snow reaching the surface includes a substantial layer where temperatures are above 0°C.
False: because it melts at any temperature above 0C
9. True or false: In the Northern Hemisphere, the deflection to the East of a northward-moving parcel (due to the Coriolis force) is analogous to the increase in spin observed as a skater's arms are drawn toward his axis of rotation.
True. As an air parcel moves poleward, the distance R to the earth’s axis of rotation decreases. Since the Earth’s rotation is constant, the relative velocity (u0 of the air parcel must increase to conserve absolute angular momentum, which we explained this zonal deflection as the Corioles Force.
10. True or false: Due to increased centrifugal forces acting on parcels moving East with respect to the surface (as compared to stationary parcels), the sum of centrifugal and gravitational forces aren’t perpendicular to the surface anymore, resulting in southward deflection.
11. Can the pressure gradient force be explained in terms of the sum of forces acting on a parcel due to atmospheric pressure at the parcel's boundary?
Yes, In atmospheric science, balanced flow is an idealisation of atmospheric motion. The idealisation consists in considering the behaviour of one isolated parcel of air having constant density, its motion on a horizontal plane subject to selected forces acting on it and, finally, steady-state conditions.
Balanced flow is often an accurate approximation of the actual flow, and is useful in improving the qualitative...