FY-3B TOU与Aura OMI卫星臭氧总量产品的比对分析

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。

Correlative Study between UV Irradiance and TOC Using AURA OMI at Kannur (12.3N, 75.4E)

The solar UV radiation has prominent impacts on human life, animals and plants with positive and negative effects. Atmospheric ozone, which is formed from the photodissociation of molecular oxygen mainly in the stratosphere, absorbs a significant factor of solar UV radiation. The ozone in the stratosphere acts as a protective layer to prevent UV radiation reaching on the surface of the earth. Hence the intensity of solar UV radiation on the surface has a strong dependence on the Total Ozone Column (TOC). The UV irradiance on earth surface depends on geometrical factors such as solar zenith angle, altitude, latitude and other atmospheric parameters as well. This is an attempt to study the variation of solar UV flux at its four discrete wavelengths ranging from 305 - 380 nm at Kannur, which is located in the north of Kerala in India. Hence such a correlation of TOC and UV irradiance is relevant to realize the radiation budget at this location (12.3N, 75.4E) using AURA OMI data. This paper reveals the correlation of day to day, month to month temporal variation of total ozone column (in DU) and UV irradiance (w/m2). From the analysis, the anti-correlation between UV and TOC is revealed and its impact in the solar radiation budget is established.

基于GIS的FY3 TOU臭氧总量产品验证分析查询系统

风云三号(FY-3)是中国的第二代极轨气象卫星,其星载遥感仪器探测全球资料的能力大大提高。目前,FY-3卫星臭氧总量产品已实现业务化生成,并且在多个应用领域中取得成功。然而,对于FY-3臭氧总量产品的精度评估分析还没有一个通用型的验证软件,能够快速获取全球任意区域的FY-3臭氧总量产品的精度。利用GIS地理信息系统和数据库技术进行FY-3臭氧总量产品验证分析软件的设计,基于地基观测数据和Aura OMI卫星臭氧数据,完成FY-3卫星臭氧总量产品与地基和星基的对比分析,实现FY-3卫星臭氧总量产品检验的自动化,为今后开展类似卫星臭氧产品的验证提供便捷平台。