Comparison of fitting results of four distribution functions to asymptotic distribution of yearly maximum surface wind speed over chengdu 成都地面風(fēng)速年極值的4種分布函數(shù)擬合結(jié)果的比較
The estimated daily evapotranspiration is mostly affected by diurnal variations of surface wind speed and overpass of clouds , and more detailed and intensive research works are to be carried out to obtain more reliable daily water evaporation loses 風(fēng)速變化和云的干擾依然是時(shí)間尺度擴(kuò)展中遇到的主要問題,由于難度較大,這方面的研究還需要更多,更細(xì)致的工作。
It is shown that the error could be rather remarkable in some extreme situations and could be neglected in the others . the variance of parameters inside pixel , contexture of the pixel and the surface wind speed are the controlling factors of the scaling error 結(jié)果表明亞像元狀態(tài)和結(jié)構(gòu)是像元尺度誤差的主導(dǎo)因素,風(fēng)速變化對(duì)尺度誤差有明顯的影響,不論何種形式的非均勻性,都須遵循相同的尺度擴(kuò)展步驟,以達(dá)到消除誤差的目的。
The information is generated by the observatory s high - speed computer using physical models and mathematical equations to simulate the evolution of weather systems . the computer simulations are presented as maps showing the surface temperature , surface wind speed and wind direction , mean sea level pressure and the state of the sky at various locations 這些預(yù)測資料是利用天文臺(tái)高速電腦根據(jù)物理定律及數(shù)學(xué)方法計(jì)算出來的,以天氣圖顯示,內(nèi)容包括地面溫度、地面風(fēng)向及風(fēng)速、平均海平面氣壓及天氣的大致情況。
The methods reported by g . s . young in 2000 , are applied on sea surface sar images featured by three dimensional convective cells . then the following parameters are retrieved from sar images : the characteristic wave length of three dimensional convective cell , the mabl depth , the vertical convective scale velocity , the surface buoyancy flux , obukhov length and the stability correction factor for sar derived sea surface wind speed 針對(duì)海洋大氣邊界層中三維對(duì)流渦旋sar圖像,用g . s . young在2000年發(fā)表的方法,反演三維對(duì)流渦旋的特征長度、海洋大氣邊界層高度、以及海洋大氣邊界層垂直對(duì)流尺度速度、表面浮力通量、海面風(fēng)速穩(wěn)定性校正因子和obukhov長度。