Combined effects of the Pacific Decadal Oscillation and El Nino-Southern Oscillation on Global Land Dry-Wet Changes
Wang, SS; Huang, JP; He, YL; Guan, YP; hjp@lzu.edu.cn
2014
发表期刊SCIENTIFIC REPORTS
ISSN2045-2322
卷号4页码:-6651
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.
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
学科领域Science & Technology - Other Topics
资助者National Basic Research Program of China [2012CB955301, 2013CB956201] ; National Basic Research Program of China [2012CB955301, 2013CB956201] ; National Basic Research Program of China [2012CB955301, 2013CB956201] ; National Basic Research Program of China [2012CB955301, 2013CB956201]
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收录类别sci
资助项目LTO
资助者National Basic Research Program of China [2012CB955301, 2013CB956201] ; National Basic Research Program of China [2012CB955301, 2013CB956201] ; National Basic Research Program of China [2012CB955301, 2013CB956201] ; National Basic Research Program of China [2012CB955301, 2013CB956201]
WOS记录号WOS:000343090400001
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10502
专题热带海洋环境国家重点实验室(LTO)
通讯作者hjp@lzu.edu.cn
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Wang, SS,Huang, JP,He, YL,et al. Combined effects of the Pacific Decadal Oscillation and El Nino-Southern Oscillation on Global Land Dry-Wet Changes[J]. SCIENTIFIC REPORTS,2014,4:-6651.
APA Wang, SS,Huang, JP,He, YL,Guan, YP,&hjp@lzu.edu.cn.(2014).Combined effects of the Pacific Decadal Oscillation and El Nino-Southern Oscillation on Global Land Dry-Wet Changes.SCIENTIFIC REPORTS,4,-6651.
MLA Wang, SS,et al."Combined effects of the Pacific Decadal Oscillation and El Nino-Southern Oscillation on Global Land Dry-Wet Changes".SCIENTIFIC REPORTS 4(2014):-6651.
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