Potential causes of megadroughts in North China in the preindustrial period from the teleconnection perspective
文献类型：期刊论文
| 作者 | Zhang, Xuezhen1,2; Bai, Mengxin1,2,3; Hao, Zhixin1,2; Zheng, Jingyun1,2 |
| 刊名 | GLOBAL AND PLANETARY CHANGE
 |
| 出版日期 | 2021-10-01 |
| 卷号 | 205页码:10 |
| 关键词 | North China External forcing Teleconnection Megadrought Atmospheric circulation anomaly |
| ISSN号 | 0921-8181 |
| DOI | 10.1016/j.gloplacha.2021.103596 |
| 通讯作者 | Zheng, Jingyun(zhengjy@igsnrr.ac.cn) |
| 英文摘要 | The potential causes of megadroughts over North China (NC) in the preindustrial period were investigated using eight climate models evolved using CMIP5/PMIP3 and multiple proxy data. The full forcing experiments driven by both external forcing and internal variability show that megadroughts in NC were accompanied by extensive decadal drying over the Northern Hemisphere (NH), particularly in most of North America and Europe. The spatial pattern of hydroclimate matched well with the proxy-based illustration. However, such hydroclimate conditions over NH were difficult to reproduce in control experiments driven solely by internal variability. This finding suggests that external forcing may be a crucial factor leading to megadroughts in NC and simultaneous decadal drying over the NH. Moreover, external forcing may lead to climate cooling. Climate cooling weakened the pressure gradient from the West Pacific to East Asia and hence reduced the water vapor to land; meanwhile, local vertical downward movement occurred in the cooling climate background, which was unfavorable to air convection over NC. Both reduced water vapor and weakened air convection led to less precipitation. Meanwhile, there was a negative NAO, which intensified the eastward wave train at mid-latitudes. Consequently, the North American trough and European trough deepened, the northerlies in the post trough pattern intensified, and the water vapor from the high-latitude continent or polar areas was low, which was unfavorable to precipitation. This study implies that the megadrought in NC and simultaneous hydroclimatic spatial pattern over the NH may be underestimated in the CMIP5 climate prediction, which excludes external forcing. |
| WOS关键词 | EASTERN CHINA ; LAST MILLENNIUM ; PRECIPITATION VARIABILITY ; GRAIN PRODUCTION ; DROUGHT ; CLIMATE ; PATTERNS ; MONSOON ; EVENTS ; INDEX |
| 资助项目 | National Key R&D Program of China on Global Change[2016YFA0600401] ; National Key R&D Program of China on Global Change[2017YFA0603301] ; Key Research Program of Frontier Sciences from CAS[ZDRWZS-2017-4] |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000693570500005 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key R&D Program of China on Global Change ; Key Research Program of Frontier Sciences from CAS |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/165408]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zheng, Jingyun |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 3.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xuezhen,Bai, Mengxin,Hao, Zhixin,et al. Potential causes of megadroughts in North China in the preindustrial period from the teleconnection perspective[J]. GLOBAL AND PLANETARY CHANGE,2021,205:10. |
| APA | Zhang, Xuezhen,Bai, Mengxin,Hao, Zhixin,&Zheng, Jingyun.(2021).Potential causes of megadroughts in North China in the preindustrial period from the teleconnection perspective.GLOBAL AND PLANETARY CHANGE,205,10. |
| MLA | Zhang, Xuezhen,et al."Potential causes of megadroughts in North China in the preindustrial period from the teleconnection perspective".GLOBAL AND PLANETARY CHANGE 205(2021):10. |
入库方式： OAI收割
来源：地理科学与资源研究所
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