【摘要】：基于地基天頂角輻射測量方法的AERONET云模式可反演云光學(xué)厚度(COD),結(jié)合MODIS衛(wèi)星反演的云產(chǎn)品資料,對2011年1月~2012年6月香河站云光學(xué)特性進(jìn)行分析,并討論了氣溶膠光學(xué)厚度(AOD)和COD間的關(guān)系.結(jié)果表明:碎云和陰天狀況下,地基和衛(wèi)星資料反演云的COD存在顯著的正相關(guān),MODIS反演的COD平均值比地基觀測值分別小10.8和9.4;香河站天頂角方向COD和非降水云出現(xiàn)次數(shù)(Num)存在顯著的日變化:COD在早晨和黃昏有減小趨勢,在中午和下午有增大趨勢;Num日變化曲線呈雙峰型,峰值分別出現(xiàn)在早晨和午后,最小值出現(xiàn)在正午前后;COD季平均值為秋春冬夏,各季都有超過65%的COD集中在10~40;夏季觀測天數(shù)最多,變化程度最小;對香河站COD與AOD時間序列作線性回歸分析,并進(jìn)行顯著性檢驗,發(fā)現(xiàn)COD的觀測頻率和細(xì)模態(tài)AOD有較強的正相關(guān)性.
[Abstract]:Based on the AERONET cloud model based on foundation zenith angle radiation measurement method, the cloud optical thickness (COD), combined with MODIS satellite inversion cloud product data are analyzed, and the relationship between aerosol optical thickness (AOD) and COD is discussed from January 2011 to June 2012. The results show that there is a significant positive correlation between the COD of the ground and satellite data inversion clouds under the condition of broken clouds and cloudy days, and the average COD values of MODIS inversion are 10.8 and 9.4 lower than those of foundation observations, respectively. There are significant diurnal changes in COD and non-precipitation clouds in the zenith corner direction of Xianhe station: COD decreases in the morning and dusk, and increases at noon and afternoon. The diurnal variation curve of Num was bimodal, the peak appeared in the morning and afternoon, and the minimum value appeared around noon. The average value of COD season was autumn, spring, winter and summer, and more than 65% of COD was concentrated in 10 鈮，

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