Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3081-z |
Accelerated greenhouse gases versus slow insolation forcing induced climate changes in southern South America since the Mid-Holocene | |
Berman, Ana Laura1; Silvestri, Gabriel E.1; Rojas, Maisa2; Tonello, Marcela S.3 | |
2017 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48 |
文章类型 | Article |
语种 | 英语 |
国家 | Argentina; Chile |
英文摘要 | This paper is a pioneering analysis of past climates in southern South America combining multiproxy reconstructions and the state-of-the-art CMIP5/PMIP3 paleoclimatic models to investigate the time evolution of regional climatic conditions from the Mid-Holocene (MH) to the present. This analysis allows a comparison between the impact of the long term climate variations associated with insolation changes and the more recent effects of anthropogenic forcing on the region. The PMIP3 multimodel experiments suggest that changes in precipitation over almost all southern South America between MH and pre-industrial (PI) times due to insolation variations are significantly larger than those between PI and the present, which are due to changes in greenhouse gas concentrations. Anthropogenic forcing has been particularly intense over western Patagonia inducing reduction of precipitation in summer, autumn and winter as a consequence of progressively weaker westerly winds over the region, which have moved further poleward, between ca. 35-55A degrees S and have become stronger south of about 50A degrees S. Orbital variations between the MH to the PI period increased insolation over southern South America during summer and autumn inducing warmer conditions in the PI, accentuated by the effect of anthropogenic forcing during the last century. On the other hand, changes in orbital parameters from the MH to the PI period reduced insolation during winter and spring inducing colder conditions, which have been reversed by the anthropogenic forcing. |
英文关键词 | Mid-Holocene PMIP3 models natural forcing Anthropogenic forcing South America Patagonia |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000392307300022 |
WOS关键词 | LAST GLACIAL MAXIMUM ; WESTERLY WIND BELT ; HOLOCENE CLIMATE ; LATE PLEISTOCENE ; HUMAN OCCUPATION ; MONSOON SYSTEM ; NORTHERN CHILE ; YR BP ; ARGENTINA ; PATAGONIA |
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/35491 |
专题 | 气候变化 |
作者单位 | 1.UBA, Ctr Invest Mar & Atmosfera, CONICET, UMI IFAECI,CNRS, Int Guiraldes 2160,Ciudad Univ, Buenos Aires, DF, Argentina; 2.Univ Chile, Dept Geofis, Blanco Encalada 2002, Santiago, Chile; 3.UNMdP, CONICET, Lab Paleoecol & Palinol Ecol & Paleoecol Ambiente, Inst Invest Marinas & Costeras IIMyC, JB Justo 2550, Mar Del Plata, Argentina |
推荐引用方式 GB/T 7714 | Berman, Ana Laura,Silvestri, Gabriel E.,Rojas, Maisa,et al. Accelerated greenhouse gases versus slow insolation forcing induced climate changes in southern South America since the Mid-Holocene[J]. CLIMATE DYNAMICS,2017,48. |
APA | Berman, Ana Laura,Silvestri, Gabriel E.,Rojas, Maisa,&Tonello, Marcela S..(2017).Accelerated greenhouse gases versus slow insolation forcing induced climate changes in southern South America since the Mid-Holocene.CLIMATE DYNAMICS,48. |
MLA | Berman, Ana Laura,et al."Accelerated greenhouse gases versus slow insolation forcing induced climate changes in southern South America since the Mid-Holocene".CLIMATE DYNAMICS 48(2017). |
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