FY-3B TOU与Aura OMI卫星臭氧总量产品的比对分析

Comparative analysis of total ozone products between FY-3B TOU and Aura OMI satellite

通过FY-3B TOU与Aura OMI卫星臭氧总量产品的比对分析,检验FY-3B TOU臭氧总量产品的适用性。结果显示,两者的相对偏差(RD)在赤道、南北半球中纬度大部分地区为2%~4%,而在南北极区扩到4%~6%和8%~10%,从赤道到两极RD随纬度升高而增大;除南北极区外,其余地区RD月平均值均呈现出明显的季节变化特征,尤其南半球中纬度地区的季节特征更为显著;赤道地区RD值随卫星臭氧总量的变化波动较小,基本稳定在0.1%~2.9%,其余地区仅卫星臭氧总量在230~500DU之间时,RD才出现相对稳定的波动,可见除赤道地区外RD在不同区域对卫星臭氧总量值有一定程度的依赖性;南北极区太阳天顶角(SZA)在45°~65°期间,RD随SZA增大均呈正的下降趋势,在70°~80°之间均呈现小幅度的回升,总体来看,TOU臭氧总量RD值受SZA变化情况并不明显。

The total ozone products of FY-3B TOU(November 2010 to December 2016)were verified and analyzed by OMTO3e,the total ozone product of Aura-OMI satellite.The results show that RD values of the equator and in most of the middle latitudes of northern and southern hemispheres are in the range of 2%~4%,and the RD values in the north and south polar regions are in the range of 4%~6%and 8%~10%.In different spaces from the equator to the poles,RD increases with the increase of latitude.Except for the north and south polar regions,the monthly mean RD shows obvious seasonal variation characteristics,especially in the middle latitude region of the southern hemisphere.The RD value in the equatorial region fluctuates slightly with the variation of the total satellite ozone,which is basically stable in the range of 0.1%~2.9%.In the other regions,RD fluctuates is relatively stable only when the total satellite ozone is between 230~500 DU.The RD shows a certain degree of dependence on the total satellite ozone value in different regions.The RD shows a positive downward trend with the increase of the solar zenith angle(SZA)in the period of 45°~65°in the south and north polar regions,and a slight upward trend between 70°~80°.To sum up,the RD of total ozone between TOU and OMTO3e is not significantly affected by SZA.