Energetics of a Southeastern Pacific cut-off low

被引：13

作者：

Gan, Manoel Alonso ^{[1
]}

Dal Piva, Everson ^{[2
]}

机构：

[1] Inst Nacl Pesquisas Espaciais, Ctr Previsao Tempo & Estudos Climat, BR-12201970 Sao Jose Dos Campos, SP, Brazil

[2] Univ Fed Santa Maria, Dept Fis, Ctr Ciencias Nat & Exatas, BR-97119900 Santa Maria, RS, Brazil

来源：

ATMOSPHERIC SCIENCE LETTERS | 2013年 / 14卷 / 04期

关键词：

cut-off low; energetics; ageostrophic flux convergence; baroclinic conversion; barotropic conversion; SOUTHERN-HEMISPHERE; LIFE-CYCLE; EDDY ENERGY; WAVE;

D O I：

10.1002/asl2.451

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The occurrence of cut-off lows (COLs) over South Pacific can be seen on different synoptic maps and on satellite imageries. However, the formation and maintenance mechanisms of the COLs are not well understood. An energetics analysis of a COL case through the eddy kinetic energy (EKE) equation is the aim of this study. The main terms analysed were ageostrophic flux convergence (AFC), baroclinic (BRC) and barotropic (BRT) conversions. This analysis shows that the formation mechanism of the COL was associated with BRC (COL western side) and AFC (COL eastern side). After the maximum intensity period, the BRC term was negative and the AFC positive.

引用

页码：272 / 280

页数：9

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