Thermal infrared opacity of the Mars atmosphere
Thermal infrared opacity of the Mars atmosphere
复制标题
火星大气层的热红外不透明度
DOI：
10.1016/0019-1035(86)90003-5
复制
发表时间：
1986
期刊：
影响因子：
3.2
通讯作者：
T. Martin
中科院分区：
文献类型：
--
作者：
T. Martin
本文介绍了一种由维京海盗红外热成像仪的亮温测量反演火星大气9 μm消光不透明度的改进方法。改进包括模拟垂直温度剖面、地表-大气温度不连续性以及地表发射率和粒子散射的影响。该程序适用于火星平均数据集，以产生一个以上的火星年的纬向平均不透明度。一年的平均9 μm不透明度为0.5，但由于非常偏态的分布，众数值仅为0.056。在维京海盗登陆器1和2网站的不透明度的时间历史生成和原位数据进行比较。给出了1977 a沙尘暴期间Ls 168 -270的不透明度图;这些图以10° Lsresolution显示了沙尘暴的成因和传播。
A refined technique is presented for deriving 9-μm extinction opacities of the Mars atmosphere from brightness temperature measurements made by the Viking Infrared Thermal Mapper. Improvements include modeling of the vertical temperature profile, a surface-atmosphere temperature discontinuity, and the effects of surface emissitivity and particle scattering. The routine is applied to the Mars Average Data Set to yield zonal mean opacities for more than one Mars year. The mean 9-μm opacity for one year is 0.5, yet the mode value is only 0.056, due to the very skewed distribution. Time histories of opacity at the Viking Lander 1 and 2 sites are generated and compared to in situ data. Opacity maps are presented for the period Ls168–270 covering the 1977a dust storm; these show the genesis and spread of the storm with 10° Lsresolution.