地球大氣圈的變化英文版-wenkub.com
2025-03-19 04:57 本頁(yè)面
【正文】 Evolution of the Atmosphere Review of last lecture ? The modern climatology (meteorology) was born in the 1940s (a very young science!), but has been growing very fast! Now we have a global observational work with many satellites, ships, radars and surface stations, as well as very prehensive prediction models running on the world’s fastest superputers. ? The current status of weather and climate predictions: (1) weather prediction good to 10 days, (2) tropical cyclone prediction good in track but not in intensity, (3) climate prediction good to two seasons, (4) climate change projections have a 3fold difference in magnitude. ? The main reasons of the difficulties in weather and climate predictions: (1) Teleconnection problem, (2) Feedback problem, and (3) Subgridscale problem. Some basic concepts ? Units of measurement ? Scientific notation Standard units of measurement SI (System International) Quantity Name Units Symbol Length meter m m Mass kilogram kg kg Time second s s Temperature Kelvin K K Density kilogram kg/m3 kg/m3 per cubic meter Speed meter per m/s m/s second Force newton Pressure pascal N/m2 Pa Energy joule J Power watt J/s W Scientific Notation nano onebillionth 109 micro onemil
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