DOI: 10.1002/2016GL071279
论文题名: The thermodynamic effect of atmospheric mass on early Earth's temperature
作者: Chemke R. ; Kaspi Y. ; Halevy I.
刊名: Geophysical Research Letters
ISSN: 0094-8412
EISSN: 1944-8143
出版年: 2016
卷: 43, 期: 21 起始页码: 11414
结束页码: 11422
语种: 英语
英文关键词: Atmospheric Mass
; Early Earth Atmosphere
; Temperature
Scopus关键词: Atmospheric radiation
; Climate models
; Earth atmosphere
; Specific heat
; Surface properties
; Temperature
; Thermodynamics
; Early Earth atmosphere
; Global circulation model
; Meridional temperature gradient
; Near surface temperature
; Radiative cooling
; Radiative forcings
; Thermodynamic effect
; Vertical advection
; Atmospheric temperature
英文摘要: Observations suggest that Earth's early atmospheric mass differed from the present day. The effects of a different atmospheric mass on radiative forcing have been investigated in climate models of variable sophistication, but a mechanistic understanding of the thermodynamic component of the effect of atmospheric mass on early climate is missing. Using a 3-D idealized global circulation model (GCM), we systematically examine the thermodynamic effect of atmospheric mass on near-surface temperature. We find that higher atmospheric mass tends to increase the near-surface temperature mostly due to an increase in the heat capacity of the atmosphere, which decreases the net radiative cooling effect in the lower layers of the atmosphere. Additionally, the vertical advection of heat by eddies decreases with increasing atmospheric mass, resulting in further near-surface warming. As both net radiative cooling and vertical eddy heat fluxes are extratropical phenomena, higher atmospheric mass tends to flatten the meridional temperature gradient. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84997771259&doi=10.1002%2f2016GL071279&partnerID=40&md5=4ebd8ba1a568b3f871c531638379b4a5
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9375
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel
Recommended Citation:
Chemke R.,Kaspi Y.,Halevy I.. The thermodynamic effect of atmospheric mass on early Earth's temperature[J]. Geophysical Research Letters,2016-01-01,43(21).