globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-013-2023-2
Scopus记录号: 2-s2.0-84890384375
论文题名:
Summer precipitation variability over South America on long and short intraseasonal timescales
作者: Gonzalez P.L.M.; Vera C.S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 43, 期:2017-07-08
起始页码: 1993
结束页码: 2007
语种: 英语
英文关键词: Intraseasonal variability ; MJO ; SASS ; South America ; Summer precipitation
英文摘要: A dipole pattern in convection between the South Atlantic convergence zone and the subtropical plains of southeastern South America characterizes summer intraseasonal variability over the region. The dipole pattern presents two main bands of temporal variability, with periods between 10 and 30 days, and 30 and 90 days; each influenced by different large-scale dynamical forcings. The dipole activity on the 30–90-day band is related to an eastward traveling wavenumber-1 structure in both OLR and circulation anomalies in the tropics, similar to that associated with the Madden–Julian oscillation. The dipole is also related to a teleconnection pattern extended along the South Pacific between Australia and South America. Conversely, the dipole activity on the 10–30-day band does not seem to be associated with tropical convection anomalies. The corresponding circulation anomalies exhibit, in the extratropics, the structure of Rossby-like wave trains, although their sources are not completely clear. © 2013, Springer-Verlag Berlin Heidelberg.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55070
Appears in Collections:过去全球变化的重建

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作者单位: International Research Institute for Climate and Society, Columbia University, 61 Route 9W, 202b Monell, Palisades, NY, United States; Centro de Investigaciones del Mar y la Atmosfera (CIMA/CONICET-UBA), DCAO/FCEN, UMI IFAECI/CNRS 2do piso, Pabellon II, Ciudad Universitaria, Buenos Aires, Argentina

Recommended Citation:
Gonzalez P.L.M.,Vera C.S.. Summer precipitation variability over South America on long and short intraseasonal timescales[J]. Climate Dynamics,2013-01-01,43(2017-07-08)
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