Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.quascirev.2015.08.012 |
Arctic climate response to the termination of the African Humid Period | |
Muschitiello, Francesco1,2; Zhang, Qiong1,3; Sundqvist, Hanna S.1,3; Davies, Frazer J.4; Renssen, Hans4 | |
通讯作者 | Muschitiello, Francesco |
来源期刊 | QUATERNARY SCIENCE REVIEWS
![]() |
ISSN | 0277-3791 |
出版年 | 2015 |
卷号 | 125页码:91-97 |
英文摘要 | The Earth’s climate response to the rapid vegetation collapse at the termination of the African Humid Period (AHP) (5.5-5.0 kyr BP) is still lacking a comprehensive investigation. Here we discuss the sensitivity of mid-Holocene Arctic climate to changes in albedo brought by a rapid desertification of the Sahara. By comparing a network of surface temperature reconstructions with output from a coupled global climate model, we find that, through a system of land-atmosphere feedbacks, the end of the AHP reduced the atmospheric and oceanic poleward heat transport from tropical to high northern latitudes. This entails a general weakening of the mid-latitude Westerlies, which results in a shift towards cooling over the Arctic and North Atlantic regions, and a change from positive to negative Arctic Oscillation-like conditions. This mechanism would explain the sign of rapid hydro-climatic perturbations recorded in several reconstructions from high northern latitudes at 5.5-5.0 kyr BP, suggesting that these regions are sensitive to changes in Saharan land cover during the present interglacial. This is central in the debate surrounding Arctic climate amplification and future projections for subtropical precipitation changes. (C) 2015 Elsevier Ltd. All rights reserved. |
英文关键词 | Mid Holocene African Humid period Arctic climate Atmospheric circulation |
类型 | Article |
语种 | 英语 |
国家 | Sweden ; Netherlands |
收录类别 | SCI-E |
WOS记录号 | WOS:000362049400006 |
WOS关键词 | HOLOCENE ATMOSPHERIC CIRCULATION ; SEA-ICE ; GYRE CIRCULATION ; DUST DEPOSITION ; SIMULATIONS ; VARIABILITY ; DYNAMICS ; PRECIPITATION ; FLUCTUATIONS ; VEGETATION |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/190088 |
作者单位 | 1.Stockholm Univ, Bolin Ctr Climate Res, SE-10691 Stockholm, Sweden; 2.Stockholm Univ, Dept Geol Sci, SE-10691 Stockholm, Sweden; 3.Stockholm Univ, Dept Phys Geog & Quaternary Geol, SE-10691 Stockholm, Sweden; 4.Vrije Univ Amsterdam, Dept Earth Sci, NL-1081 HV Amsterdam, Netherlands |
推荐引用方式 GB/T 7714 | Muschitiello, Francesco,Zhang, Qiong,Sundqvist, Hanna S.,et al. Arctic climate response to the termination of the African Humid Period[J],2015,125:91-97. |
APA | Muschitiello, Francesco,Zhang, Qiong,Sundqvist, Hanna S.,Davies, Frazer J.,&Renssen, Hans.(2015).Arctic climate response to the termination of the African Humid Period.QUATERNARY SCIENCE REVIEWS,125,91-97. |
MLA | Muschitiello, Francesco,et al."Arctic climate response to the termination of the African Humid Period".QUATERNARY SCIENCE REVIEWS 125(2015):91-97. |
条目包含的文件 | ||||||
文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
Arctic climate respo(1830KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。