Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s00382-014-2265-7 |
Complex network analysis helps to identify impacts of the El Nino Southern Oscillation on moisture divergence in South America | |
Boers, Niklas1,2; Donner, Reik V.1; Bookhagen, Bodo3; Kurths, Juergen1,2,4 | |
通讯作者 | Boers, Niklas |
来源期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2015 |
卷号 | 45期号:3-4页码:619-632 |
英文摘要 | We investigate the temporal evolution of moisture divergence and its spatial clustering properties over South America. Our analysis focuses on dependencies on the phase of the El Nino Southern Oscillation (ENSO). Moisture divergence is computed from daily reanalysis data of vertically integrated moisture flux provided by Modern-Era Retrospective Analysis for Research and Applications for the time period from 1979 to 2010. We use a sliding-window approach to construct a sequence of complex networks, each obtained from synchronization of events of strong positive (negative) moisture divergence, which we interpret as strong evapotranspiration (precipitation) events. We make the following three key observations: (1) Moisture divergence values over the Amazon rainforest are typically higher during positive ENSO periods (El Nino events). (2) The spatial coherence of strong positive (upwelling) events assumes a characteristic pattern of reduced coherence in this area during El Nino conditions. This influence of ENSO on moisture divergence and its spatial coherence is dominated by the El Nino events of 1982, 1987, and 1997. (3) The clustering characteristics of the obtained climate networks qualitatively agree with the spatial distribution of connected regions with simultaneous events (i.e., events that occur at the same time), but provide a more detailed view on the spatial organization of strong atmospheric upwelling events. Interestingly, no comparable results are found for negative extremes of moisture divergence (strong precipitation events). |
英文关键词 | Moisture divergence Extreme events South American climate El Nino Southern Oscillation Complex networks |
类型 | Article |
语种 | 英语 |
国家 | Germany ; USA ; Scotland |
收录类别 | SCI-E |
WOS记录号 | WOS:000356807800005 |
WOS关键词 | MESOSCALE CONVECTIVE COMPLEXES ; SURFACE-TEMPERATURE ; ATACAMA DESERT ; CLIMATE ; PRECIPITATION ; DYNAMICS ; ENSO |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/186520 |
作者单位 | 1.Potsdam Inst Climate Impact Res, D-14412 Potsdam, Brandenburg, Germany; 2.Humboldt Univ, Dept Phys, D-12489 Berlin, Germany; 3.Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA; 4.Univ Aberdeen, Inst Complex Syst & Math Biol, Aberdeen AB24 3FX, Scotland |
推荐引用方式 GB/T 7714 | Boers, Niklas,Donner, Reik V.,Bookhagen, Bodo,et al. Complex network analysis helps to identify impacts of the El Nino Southern Oscillation on moisture divergence in South America[J],2015,45(3-4):619-632. |
APA | Boers, Niklas,Donner, Reik V.,Bookhagen, Bodo,&Kurths, Juergen.(2015).Complex network analysis helps to identify impacts of the El Nino Southern Oscillation on moisture divergence in South America.CLIMATE DYNAMICS,45(3-4),619-632. |
MLA | Boers, Niklas,et al."Complex network analysis helps to identify impacts of the El Nino Southern Oscillation on moisture divergence in South America".CLIMATE DYNAMICS 45.3-4(2015):619-632. |
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