inversion of rainfall 中文意思是什麼
inversion of rainfall
解釋
雨量逆變-
For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics
利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性，建立了半經驗植被雷達後向散射模型; 2 ） .研究發現在農作物等矮小植被覆蓋地表，植被層直接後向散射與植被類型相關，且在植被生長期，雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ） .解決了單參數雷達地表土壤水分反演問題中，雷達入射角和地表粗糙度的影響這一難點問題; 4 ） .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ） .在以上成果基礎上，建立了完整的單參數雷達地表土壤水分變化探測反演演算法，經地表驗證，模型反演地表土壤水分變化值的精度為rmse = 0 -
For instance, hot weather and rising air can help dispersion of air pollutants ; rainfall can wash out certain pollutants in the air ; an occasional phenomenon known as temperature inversion can trap air pollutants in the lower atmosphere ; and still wind conditions can inhibit effective dispersion of air pollutants. moreover, when a weak northerly wind prevails in southern china, the impact of regional air pollution on hong kong will become more serious
例如，炎熱天氣和上升的空氣有助空氣污染物消散；降雨可沖走空氣中部份的污染物；偶爾出現的逆溫層現象能把空氣污染物困在大氣的低層；風靜的情況可引致空氣污染物不能有效消散；及當華南地區吹微弱北風時，整個香港受區域性空氣污染問題影響也會特別嚴重。
分享友人