ATMO 201 Lecture Notes - Lecture 12: Precipitation Types, Monsoon Of South Asia, Rain Gauge
5 Mar 2017
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Document Summary
Falling ice crystal leads to accretion of ice/sclw (graupel) Fractured falling ice crystals can lead to aggregation. Height of freezing level dictates either snow or rain. When ice falls, it shatters but then they combine into a snowflake (always in a 6 sided figure) Rain - hydrometeors in liquid form (>0. 5mm) anything lower is considered drizzle. Two types: stratiform rain - continuous event (several hours to months) (nimbostratus, convective rain - short, intense event (less than a half hour) Rain gauge - minimum detection of 0. 01 inch: accumulation, weighing, tipping bucket. Pacificnorthwest and asian monsoon (stratiform because it lasts for a long time) Colored rain: atmospheric pollutants can enter cloud and exit during strong precipitation events, smoke, dust, animals. Acid rain: serious issues during the latter part of 20th century, rain is naturally acidic because of co2. Why? (cid:894)thi(cid:374)k a(cid:271)out ho(cid:449) soda is (cid:373)ade (cid:895: pollution made rain much, much more acidic.
