GG101 Lecture Notes - Lecture 9: Sea Salt, List Of Cloud Types, Lapse Rate
Document Summary
Dar (dry adiabaitic rate) 10 c0 per 1000m: rate by which dry air cools if ascending or heats if descending. Nlr (normal lapse rate) 6. 4 c0 per 1000m. Environmental lapse rate (elr) 12 c0 per 1000m: rate by which air ascends or descends depending on surrounding temperature and weather, unstable as it is greater than the adiabatic rate. Conditionally unstable 7 c0 per 1000m: as environmental lapse rate is greater than moist adiabatic lapse rate and less than the dry adiabatic lapse rate, in between the two so air rises then comes back down repeatedly. Cloud formation processes: adiabatic cooling by vertical lift, air parcel cools to the dew point temperature, air parcel becomes saturated, condensation occurs, occurs when air reaches dew point temperature. Moisture droplets and raindrops: cloud droplets diameter is about 0. 001mm to 0. 2, rai(cid:374)drop"s dia(cid:373)eter is about 0. 4(cid:373)(cid:373) to 4(cid:373)(cid:373) Clouds: four classifications by altitude: low (0-2000m), middle (2000-6000m), high (6000m-
