| DOI: | 10.1175/JCLI-D-14-00046.1
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| Scopus记录号: | 2-s2.0-84921683124
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| 论文题名: | Interdecadal variability of the south American precipitation in the monsoon season |
| 作者: | Grimm A.M.; Saboia J.P.J.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2015
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| 卷: | 28, 期:2 | | 起始页码: | 755
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| 结束页码: | 775
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| 语种: | 英语
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| Scopus关键词: | Atmospheric thermodynamics
; Climatology
; Orthogonal functions
; Central brazils
; Continental scale
; Empirical orthogonal function analysis
; Inter-decadal variability
; Monsoon precipitation
; Oceanic regions
; Reverse polarity
; Similar factors
; Oceanography
; decadal variation
; empirical analysis
; monsoon
; precipitation (climatology)
; spring (season)
; summer
; temperature anomaly
; Argentina
; Brazil
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| 英文摘要: | Interdecadal variability modes of monsoon precipitation over South America (SA) are provided by a continental-scale rotated empirical orthogonal function analysis, and their connections to well-known climatic indices and SST anomalies are examined. The analysis, carried out for austral spring and summer, uses a comprehensive set of station data assembled and verified for the period 1950-2000. The presented modes are robust, consistent with previous regional-scale studies and with modes obtained from longer time series over smaller domains. Opposite phases of the main modes show differences around 50% in monthly precipitation. There are significant relationships between the interdecadal variability in spring and summer, indicating local and remote influences. The first modes for both seasons are dipole-like, displaying opposite anomalies in central-east and southeast SA. They tend to reverse polarity from spring to summer. Yet the summer second mode and its related spring fourth mode, which affect the core monsoon region in central Brazil and central-northwestern Argentina, show similar factor loadings, indicating persistence of anomalies from one season to the other, contrary to the first modes. The other presented modes describe the variability in different regions with great monsoon precipitation. Significant connections with different combinations of climatic indices and SST anomalies provide physical basis for the presented modes: three show the strongest connections with SST-based indices, and two have the strongest connections with atmospheric indices. However, the main modes show connections with more than one climatic index and more than one oceanic region, stressing the importance of combined influence. © 2015 American Meteorological Society. |
| 资助项目: | NSF, National Science Foundation
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/50453
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Department of Physics, Post Graduate Program on Water Resources and Environmental Engineering, Federal University of Paraná, Curitiba, Brazil
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| Recommended Citation: | |
Grimm A.M.,Saboia J.P.J.. Interdecadal variability of the south American precipitation in the monsoon season[J]. Journal of Climate,2015-01-01,28(2)
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