The Penetration of Solar Radiation Into Carbon Dioxide Ice

The Penetration of Solar Radiation Into Carbon Dioxide Ice
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太阳辐射穿透二氧化碳冰

DOI:
10.1002/2018je005539
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发表时间:
2018
期刊:
Planets
影响因子:
--
通讯作者:
Chinnery H
Chinnery H
中科院分区:
--
文献类型:
--
作者:
Chinnery H

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冰冻表面与岩石或风化层覆盖的表面对辐照的反应不同。一个关键因素是可见光部分穿透到地下的能力。这导致了固态温室效应,因为冰对可见光和较短波长可以是透明或半透明的,而在红外线中是不透明的。与岩石表面相比,这可能导致浅层地下温度分布的显着差异。对于模拟固态温室效应特别重要的是三折尺度,也称为冰的吸收尺度长度或穿透深度。虽然已经有了水冰和雪的测量结果,但到目前为止,还没有公布二氧化碳冰的测量结果。经过一系列广泛的测量,我们能够将CO2冰的三重尺度限制在300至1,100 nm的累积波长范围内,这是火星表面传热模型中的一个重要参数,使我们能够更好地了解火星极地帽的表面-大气相互作用。
Icy surfaces behave differently to rocky or regolith‐covered surfaces in response to irradiation. A key factor is the ability of visible light to penetrate partially into the subsurface. This results in the solid‐state greenhouse effect, as ices can be transparent or translucent to visible and shorter wavelengths, while opaque in the infrared. This can lead to significant differences in shallow subsurface temperature profiles when compared to rocky surfaces. Of particular significance for modeling the solid‐state greenhouse effect is thee‐folding scale, otherwise known as the absorption scale length, or penetration depth, of the ice. While there have been measurements for water ice and snow, pure and with mixtures, to date, there have been no such measurements published for carbon dioxide ice. After an extensive series of measurements we are able to constrain thee‐folding scale of CO2ice for the cumulative wavelength range 300 to 1,100 nm, which is a vital parameter in heat transfer models for the Martian surface, enabling us to better understand surface‐atmosphere interactions at Mars' polar caps.
火星上层雪/冰地下存在临时液态水?
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