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学科主题: Science & Technology - Other Topics
题名: Combined effects of the Pacific Decadal Oscillation and El Nino-Southern Oscillation on Global Land Dry-Wet Changes
作者: Wang, SS ; Huang, JP ; He, YL ; Guan, YP
通讯作者: hjp@lzu.edu.cn
刊名: SCIENTIFIC REPORTS
发表日期: 2014
卷: 4, 页:-6651
收录类别: sci
部门归属: [Wang, Shanshan ; Huang, Jianping ; He, Yongli] Lanzhou Univ, Coll Atmospher Sci, Key Lab Semiarid Climate Change, Minist Educ, Lanzhou 730000, Peoples R China ; [Wang, Shanshan ; Guan, Yuping] South China Sea Inst Oceanol, Chinese Acad Sci, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China
项目归属: LTO
资助者: National Basic Research Program of China [2012CB955301, 2013CB956201]
摘要: The effects of natural variability, especially El Nino-Southern Oscillation (ENSO) effects, have been the focus of several recent studies on the change of drought patterns with climate change. The interannual relationship between ENSO and the global climate is not stationary and can be modulated by the Pacific Decadal Oscillation (PDO). However, the global land distribution of the dry-wet changes associated with the combination of ENSO and the PDO remains unclear. In the present study, this is investigated using a revised Palmer Drought Severity Index dataset (sc_PDSI_pm). We find that the effect of ENSO on dry-wet changes varies with the PDO phase. When in phase with the PDO, ENSO-induced dry-wet changes are magnified with respect to the canonical pattern. When out of phase, these dry-wet variations weaken or even disappear. This remarkable contrast in ENSO's influence between the two phases of the PDO highlights exciting new avenues for obtaining improved global climate predictions. In recent decades, the PDO has turned negative with more La Nina events, implying more rain and flooding over land. La Nina-induced wet areas become wetter and the dry areas become drier and smaller due to the effects of the cold PDO phase.
原文出处: 查看原文
WOS记录号: WOS:000343090400001
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10502
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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Wang, SS; Huang, JP; He, YL; Guan, YP.Combined effects of the Pacific Decadal Oscillation and El Nino-Southern Oscillation on Global Land Dry-Wet Changes,SCIENTIFIC REPORTS,2014,4():-6651
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文件名: Combined effects of the Pacific Decadal Oscillation and El Nino-Southern Oscillation on Global Land Dry-Wet Changes.pdf
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