Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-17-0674.1 |
Sources of Intermodel Spread in the Lapse Rate and Water Vapor Feedbacks | |
Po-Chedley, Stephen1; Armour, Kyle C.2,3; Bitz, Cecilia M.2; Zelinka, Mark D.1; Santer, Benjamin D.1; Fu, Qiang2 | |
2018-04-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:8页码:3187-3206 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Sources of intermodel differences in the global lapse rate (LR) and water vapor (WV) feedbacks are assessed using CO2 forcing simulations from 28 general circulation models. Tropical surface warming leads to significant warming and moistening in the tropical and extratropical upper troposphere, signifying a nonlocal, tropical influence on extratropical radiation and feedbacks. Model spread in the locally defined LR and WV feedbacks is pronounced in the Southern Ocean because of large-scale ocean upwelling, which reduces surface warming and decouples the surface from the tropospheric response. The magnitude of local extratropical feedbacks across models and over time is well characterized using the ratio of tropical to extratropical surface warming. It is shown that model differences in locally defined LR and WV feedbacks, particularly over the southern extratropics, drive model variability in the global feedbacks. The cross-model correlation between the global LR and WV feedbacks therefore does not arise from their covariation in the tropics, but rather from the pattern of warming exerting a common control on extratropical feedback responses. Because local feedbacks over the Southern Hemisphere are an important contributor to the global feedback, the partitioning of surface warming between the tropics and the southern extratropics is a key determinant of the spread in the global LR and WV feedbacks. It is also shown that model Antarctic sea ice climatology influences sea ice area changes and southern extratropical surface warming. As a result, model discrepancies in climatological Antarctic sea ice area have a significant impact on the intermodel spread of the global LR and WV feedbacks. |
英文关键词 | Climate change Climate sensitivity Climate models |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428694000013 |
WOS关键词 | GENERAL-CIRCULATION MODELS ; HIGH-LATITUDE CLIMATE ; ARCTIC SEA-ICE ; POLAR AMPLIFICATION ; TROPOSPHERIC TEMPERATURE ; RADIATIVE FEEDBACKS ; RELATIVE-HUMIDITY ; EVOLVING PATTERNS ; CO2 CONCENTRATION ; ATMOSPHERIC CO2 |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/19546 |
专题 | 气候变化 |
作者单位 | 1.Lawrence Livermore Natl Lab, Livermore, CA 94550 USA; 2.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 3.Univ Washington, Sch Oceanog, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Po-Chedley, Stephen,Armour, Kyle C.,Bitz, Cecilia M.,et al. Sources of Intermodel Spread in the Lapse Rate and Water Vapor Feedbacks[J]. JOURNAL OF CLIMATE,2018,31(8):3187-3206. |
APA | Po-Chedley, Stephen,Armour, Kyle C.,Bitz, Cecilia M.,Zelinka, Mark D.,Santer, Benjamin D.,&Fu, Qiang.(2018).Sources of Intermodel Spread in the Lapse Rate and Water Vapor Feedbacks.JOURNAL OF CLIMATE,31(8),3187-3206. |
MLA | Po-Chedley, Stephen,et al."Sources of Intermodel Spread in the Lapse Rate and Water Vapor Feedbacks".JOURNAL OF CLIMATE 31.8(2018):3187-3206. |
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