DOI: 10.1002/2014GL059861
论文题名: Recent Ice Ages on Mars: The role of radiatively active clouds and cloud microphysics
作者: Madeleine J.-B. ; Head J.W. ; Forget F. ; Navarro T. ; Millour E. ; Spiga A. ; Colaïtis A. ; Määttänen A. ; Montmessin F. ; Dickson J.L.
刊名: Geophysical Research Letters
ISSN: 0094-9906
EISSN: 1944-9637
出版年: 2014
卷: 41, 期: 14 起始页码: 4873
结束页码: 4879
语种: 英语
英文关键词: Climate
; Climate model
; Clouds
; Glaciation
; Mars
; Paleoclimate
Scopus关键词: Climate models
; Clouds
; Deposits
; Dust
; Global warming
; Atmospheric dust
; Climate
; Cloud microphysics
; Glacial deposits
; Glaciation
; Global climate model
; Mars
; Paleoclimates
; Glacial geology
; climate modeling
; cloud microphysics
; glaciation
; Mars
; Martian atmosphere
; paleoclimate
; Pleistocene
英文摘要: Global climate models (GCMs) have been successfully employed to explain the origin of many glacial deposits on Mars. However, the latitude-dependent mantle (LDM), a dust-ice mantling deposit that is thought to represent a recent "Ice Age," remains poorly explained by GCMs. We reexamine this question by considering the effect of radiatively active water-ice clouds (RACs) and cloud microphysics. We find that when obliquity is set to 35°, as often occurred in the past 2 million years, warming of the atmosphere and polar caps by clouds modifies the water cycle and leads to the formation of a several centimeter-thick ice mantle poleward of 30° in each hemisphere during winter. This mantle can be preserved over the summer if increased atmospheric dust content obscures the surface and provides dust nuclei to low-altitude clouds. We outline a scenario for its deposition and preservation that compares favorably with the characteristics of the LDM. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904532906&doi=10.1002%2f2014GL059861&partnerID=40&md5=6dc92e8e0fb5433d085b279c3bb0edb6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7170
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geological Sciences, Brown University, Providence, RI, United States
Recommended Citation:
Madeleine J.-B.,Head J.W.,Forget F.,et al. Recent Ice Ages on Mars: The role of radiatively active clouds and cloud microphysics[J]. Geophysical Research Letters,2014-01-01,41(14).