基于地基天顶辐射资料研究香河站云光学特性
发布时间：2019-06-27 19:09
【摘要】：基于地基天顶角辐射测量方法的AERONET云模式可反演云光学厚度(COD),结合MODIS卫星反演的云产品资料,对2011年1月~2012年6月香河站云光学特性进行分析,并讨论了气溶胶光学厚度(AOD)和COD间的关系.结果表明:碎云和阴天状况下,地基和卫星资料反演云的COD存在显著的正相关,MODIS反演的COD平均值比地基观测值分别小10.8和9.4;香河站天顶角方向COD和非降水云出现次数(Num)存在显著的日变化:COD在早晨和黄昏有减小趋势,在中午和下午有增大趋势;Num日变化曲线呈双峰型,峰值分别出现在早晨和午后,最小值出现在正午前后;COD季平均值为秋春冬夏,各季都有超过65%的COD集中在10~40;夏季观测天数最多,变化程度最小;对香河站COD与AOD时间序列作线性回归分析,并进行显著性检验,发现COD的观测频率和细模态AOD有较强的正相关性.
[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，
本文编号：2507062
[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，
本文编号：2507062
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