DOI: 10.1002/2015GL064912
论文题名: Titan's asymmetric lake distribution mediated by methane transport due to atmospheric eddies
作者: Lora J.M. ; Mitchell J.L.
刊名: Geophysical Research Letters
ISSN: 0094-8593
EISSN: 1944-8324
出版年: 2015
卷: 42, 期: 15 起始页码: 6213
结束页码: 6220
语种: 英语
英文关键词: atmospheres
; methane cycle
; moisture transport
; Titan
Scopus关键词: Extraterrestrial atmospheres
; Moisture
; Atmospheric moisture
; General circulation model simulations
; Hemi-spheric asymmetries
; Meridional circulation
; Moisture transport
; Northern Hemispheres
; Three dimensional simulations
; Titan
; Methane
; baroclinic mode
; eddy
; gas transport
; general circulation model
; lacustrine environment
; meridional circulation
; methane
; moisture transfer
; orbital forcing
; Titan
英文摘要: The hemispheric asymmetry of Titan's surface methane has been proposed to be a consequence of orbital forcing affecting Titan's hydrologic cycle, but the mechanism behind asymmetrical transport of moisture remains to be examined. Using general circulation model simulations of Titan's atmosphere, we show that atmospheric moisture transport by three-dimensional tropospheric eddies is critical in generating Titan's surface liquid asymmetry. Comparison of axisymmetric and three-dimensional simulations demonstrates that a significant asymmetry only develops in the latter case. Analysis of the components of the three-dimensional moisture transport reveals that nonaxisymmetric eddies transport methane away from the poles and into the midlatitudes, where they transfer moisture into the cross-equatorial transport by the mean meridional circulation, producing an atmospheric "bucket brigade." Because these high-latitude, baroclinic eddies are more intense in the south than in the north, the net transport is preferentially northward, with the northern hemisphere gaining surface liquid at the expense of the southern hemisphere. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940450643&doi=10.1002%2f2015GL064912&partnerID=40&md5=a88c9a4a2f270cfff291f1970558716e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8209
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth, Planetary, and Space Sciences, University of Calilfornia, Los Angeles, CA, United States
Recommended Citation:
Lora J.M.,Mitchell J.L.. Titan's asymmetric lake distribution mediated by methane transport due to atmospheric eddies[J]. Geophysical Research Letters,2015-01-01,42(15).