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DOI | 10.1088/1748-9326/ab7767 |
Major factors of global and regional monsoon rainfall changes: natural versus anthropogenic forcing | |
Ha, Kyung-Ja1,2,3; Kim, Byeong-Hee1,2,3; Chung, Eui-Seok1; Chan, Johnny C. L.4; Chang, Chih-Pei5 | |
2020-03-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2020 |
卷号 | 15期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea; Peoples R China; USA |
英文摘要 | A number of studies have investigated the mechanisms that determine changes in precipitation, including how a wet region gets wetter. However, not all monsoon areas get wetter-there is a need to understand the major factors behind changes in regional monsoon precipitation, in terms of external forcing and internal variabilities in the last six decades by a combination of different observed datasets and model runs. We have found that time of emergence of anthropogenic signals is robustly detected in the northern African monsoon before the 1990s with the use of the CESM Large Ensemble Project. From CMIP5 model runs and three reanalysis datasets, the results found are that the change in rainfall over African monsoon (AFM) is mainly due to anthropogenic forcing and that over Asian-Australian monsoon (AAM) is affected by internal variability. Moreover, the cause of American monsoon (AMM) rainfall change cannot be known due to a discrepancy among observed datasets. Here we show that the asymmetry between Northern Hemisphere (NH) and Southern Hemisphere (SH) parts by green-house gas (GHG) is detected over the AFM and AAM regions. However, the land monsoon rainfall in the northern AMM is decreased by a combination of GHG and aerosol forcing. In general, the aerosol forcing causes a decreasing rainfall over the monsoon regions. In future projection, the land rainfall over the AAM and AMM are expected to increase and decrease in the future from most models' results. The asymmetry between an increase in NH and a decrease in SH is dominant in the future from most models' future simulation results, which is well shown over the AFM and AAM. This study suggests that the physical process of GHG and aerosol effects in rainfall should be explored in the context of regional aspects. |
英文关键词 | rainfall precipitation monsoon external forcing internal variability time of emergence |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000521170900001 |
WOS关键词 | PRECIPITATION ; AEROSOLS ; CLIMATE ; SOUTH ; CHALLENGES ; MECHANISM ; INCREASE ; IMPACTS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/279260 |
专题 | 气候变化 |
作者单位 | 1.Inst Basic Sci, Ctr Climate Phys, Busan, South Korea; 2.Pusan Natl Univ, Res Ctr Climate Sci, Busan, South Korea; 3.Pusan Natl Univ, Dept Atmospher Sci, Busan, South Korea; 4.City Univ Hong Kong, Sch Energy & Environm, Guy Carpenter Asia Pacific Climate Impact Ctr, Hong Kong, Peoples R China; 5.Naval Postgrad Sch, Monterey, CA USA |
推荐引用方式 GB/T 7714 | Ha, Kyung-Ja,Kim, Byeong-Hee,Chung, Eui-Seok,et al. Major factors of global and regional monsoon rainfall changes: natural versus anthropogenic forcing[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(3). |
APA | Ha, Kyung-Ja,Kim, Byeong-Hee,Chung, Eui-Seok,Chan, Johnny C. L.,&Chang, Chih-Pei.(2020).Major factors of global and regional monsoon rainfall changes: natural versus anthropogenic forcing.ENVIRONMENTAL RESEARCH LETTERS,15(3). |
MLA | Ha, Kyung-Ja,et al."Major factors of global and regional monsoon rainfall changes: natural versus anthropogenic forcing".ENVIRONMENTAL RESEARCH LETTERS 15.3(2020). |
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