Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-17-0762.1 |
Irrigation-Induced Land-Atmosphere Feedbacks and Their Impacts on Indian Summer Monsoon | |
Chou, Chihchung1; Ryu, Dongryeol1; Lo, Min-Hui2; Wey, Hao-Wei2,3; Malano, Hector M.1 | |
2018-11-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:21页码:8785-8801 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; Taiwan; Germany |
英文摘要 | From the 1980s, Indian summer monsoon rainfall (ISMR) shows a decreasing trend over north and northwest India, and there was a significant observed reduction in July over central and south India in 1982-2003. The key drivers of the changed ISMR, however, remain unclear. It was hypothesized that the large-scale irrigation development that started in the 1950s has resulted in land surface cooling, which slowed large-scale atmospheric circulation, exerting significant influences on ISMR. To test this hypothesis, a fully coupled model, the CESM v1.0.3, was used with a global irrigation dataset. In this study, spatially varying irrigation-induced feedback mechanisms are investigated in detail at different stages of the monsoon. Results show that soil moisture and evapotranspiration increase significantly over India throughout the summertime because of the irrigation. However, 2-m air temperature shows a significant reduction only in a limited region because the temperature change is influenced simultaneously by surface incoming shortwave radiation and evaporative cooling resulting from the irrigation, especially over the heavily irrigated region. Irrigation also induces a 925-hPa northeasterly wind from 30 degrees N toward the equator. This is opposite to the prevailing direction of the Indian summer monsoon (ISM) wind that brings moist air to India. The modeled rainfall in the irrigated case significantly decreases up to 1.5 mm day(-1) over central and north India from July to September. This paper reveals that the irrigation can contribute to both increasing and decreasing the surface temperature via multiple feedback mechanisms. The net effect is to weaken the ISM with the high spatial and temporal heterogeneity. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450854800005 |
WOS关键词 | ANTHROPOGENIC GROUNDWATER EXPLOITATION ; HAIHE RIVER-BASIN ; CLIMATIC RESPONSES ; SOIL-MOISTURE ; COVER CHANGE ; RAINFALL ; MODEL ; PRECIPITATION ; SUBCONTINENT ; TEMPERATURE |
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/21070 |
专题 | 气候变化 |
作者单位 | 1.Univ Melbourne, Dept Infrastruct Engn, Parkville, Vic, Australia; 2.Natl Taiwan Univ, Dept Atmospher Sci, Taipei, Taiwan; 3.Max Planck Inst Meteorol, Hamburg, Germany |
推荐引用方式 GB/T 7714 | Chou, Chihchung,Ryu, Dongryeol,Lo, Min-Hui,et al. Irrigation-Induced Land-Atmosphere Feedbacks and Their Impacts on Indian Summer Monsoon[J]. JOURNAL OF CLIMATE,2018,31(21):8785-8801. |
APA | Chou, Chihchung,Ryu, Dongryeol,Lo, Min-Hui,Wey, Hao-Wei,&Malano, Hector M..(2018).Irrigation-Induced Land-Atmosphere Feedbacks and Their Impacts on Indian Summer Monsoon.JOURNAL OF CLIMATE,31(21),8785-8801. |
MLA | Chou, Chihchung,et al."Irrigation-Induced Land-Atmosphere Feedbacks and Their Impacts on Indian Summer Monsoon".JOURNAL OF CLIMATE 31.21(2018):8785-8801. |
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