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Thermal behavior of regolith at cold traps on the moon׳s south pole: Revealed by Chang׳E-2 microwave radiometer data
Guangfei Wei;  Xiongyao Li;  Shijie Wang
2016
发表期刊Planetary and Space Science
卷号122页码:101-109
摘要

The long-term stability of water ice at cold traps depends on subsurface temperature and regolith thermophysical properties. Based on Chang׳E-2 microwave radiometer data, we have inverted attenuation coefficient, thermal gradient and instantaneous temperature profiles at permanently shaded craters (Cabeus, Haworth and Shoemaker) on the Moon׳s south pole. The nonuniformity of the inverted attenuation coefficient within the craters reflects the inhomogeneous thermophysical properties of regolith. In addition, thermal gradient decreased significantly from the crater walls to the bottoms, which may be caused by scattered sunlight, internal heat flux and earthshine effect. Considering continuous supplement of water ice (with volumetric fraction 0–10%) at cold traps, it changes subsurface thermophysical properties but has little effect on thermal gradient. We also assumed that abundant ice (10%) mixed with regolith, the inversion results showed that the maximum difference of diurnal temperatures between “wet” and dry regolith were no more than 0.5 K. That is, the effect of water ice on subsurface thermal behavior can be neglected.

关键词Chang׳e brightness Temperature cold Traps thermal Behavior moon
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/9636
专题月球与行星科学研究中心
作者单位1.Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
推荐引用方式
GB/T 7714
Guangfei Wei;Xiongyao Li;Shijie Wang. Thermal behavior of regolith at cold traps on the moon׳s south pole: Revealed by Chang׳E-2 microwave radiometer data[J]. Planetary and Space Science,2016,122:101-109.
APA Guangfei Wei;Xiongyao Li;Shijie Wang.(2016).Thermal behavior of regolith at cold traps on the moon׳s south pole: Revealed by Chang׳E-2 microwave radiometer data.Planetary and Space Science,122,101-109.
MLA Guangfei Wei;Xiongyao Li;Shijie Wang."Thermal behavior of regolith at cold traps on the moon׳s south pole: Revealed by Chang׳E-2 microwave radiometer data".Planetary and Space Science 122(2016):101-109.
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