GEOG 2050 : Test 4
Document Summary
Climate-long term (years: average conditions (sum/ # of observations, nws 30 year average. Weather-short term: day to day condition of atmosphere, forecast future conditions for a particular day, more chaotic, less predictable than climate, national weather service (nws) Doppler radar: radar, radio detection and ranging, sends a microwave signal and listens for the reflection, how the original signal was altered, changes in frequency give velocity, the doppler effect. Doppler effect: change of frequency caused by motion of the source, passing train or police car. Air masses: the earth"s surface gives the overlying air it"s characteristics, temperature and moisture, stability. Air mass modification-figure 8. 2: as air masses moves it is modified slowly. Atmospheric lifting mechanisms: convergent lifting, air flows towards an area of low pressure, figure 8. 6a. Convectional lifting: figure 8. 6 b, temp decreases, dar if rh <100, at dew point temperature, rh=100%, use mar, condensation occurs at lifting condensation level (altitude, cumulus clouds.
