DOI: 10.1029/2017JD028017
Scopus记录号: 2-s2.0-85053410932
论文题名: Mitigation of Global Cooling by Stratospheric Chemistry Feedbacks in a Simulation of the Last Glacial Maximum
作者: Noda S. ; Kodera K. ; Adachi Y. ; Deushi M. ; Kitoh A. ; Mizuta R. ; Murakami S. ; Yoshida K. ; Yoden S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 17 起始页码: 9378
结束页码: 9390
语种: 英语
英文关键词: CO2
; Earth System Model
; Last Glacial Maximum
; ozone
; paleoclimate
; sea ice
英文摘要: The impact of changes in the stratospheric ozone profile in the Last Glacial Maximum simulation under reduced atmospheric CO2 concentrations and different orbital elements is investigated using an Earth System Model. For this, simulations including an interactive atmospheric chemistry scheme is compared with simulations using the prescribed ozone profile for a preindustrial control run of the fifth Coupled Model Intercomparison Project (CMIP5). The contribution of the interactive chemistry reveals a significant warming of zonal mean surface temperature, +0.5 K (approximately 20%) in the tropics and up to +1.6 K in high latitudes. In the tropics, this mitigation of global cooling is related to longwave radiative feedbacks associated with circulation-driven increases in the lower stratospheric ozone and in the stratospheric water vapor, and related decrease in cirrus clouds. The mechanisms are of opposite sign to and consistent with those obtained by increased CO2 simulations. In high latitude, the stronger mitigation of cooling is associated with sea ice retreat, which has the same sign to and is consistent with our previous paleoclimate simulation of the mid-Holocene (CO2 concentration of 280 ppm and orbital element change) including interactive chemistry. Most previous Last Glacial Maximum simulations with the prescribed ozone profile exhibited cold bias in the tropics compared with geological proxy data, whereas this bias is reduced in our simulations through the use of the interactive ozone chemistry, although a warmer bias in the midlatitude is enhanced. We recommend climate models to include ozone profiles that are consistent with CO2 concentrations and solar forcing. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113196
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geophysics, Kyoto University, Kyoto, Japan; Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan; Climate Research Department, Meteorological Research Institute, Tsukuba, Japan; Japan Meteorological Agency, Tokyo, Japan; Atmospheric Environment and Applied Meteorology Research Department, Meteorological Research Institute, Tsukuba, Japan; Japan Meteorological Business Support Center, Tsukuba, Japan; Meteorological College, Kashiwa, Japan
Recommended Citation:
Noda S.,Kodera K.,Adachi Y.,et al. Mitigation of Global Cooling by Stratospheric Chemistry Feedbacks in a Simulation of the Last Glacial Maximum[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(17)