Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-019-04778-1 |
The properties and genesis environments of South Atlantic cyclones | |
Gramcianinov, C. B.1; Hodges, K. I.2; Camargo, R.1 | |
2019-10-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:4115-4140 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil; England |
英文摘要 | A new climatology of South Atlantic cyclones is produced to provide new insights into the conditions leading to genesis in different regions of the domain. Cyclones are identified and tracked based on the relative vorticity at 850 hPa computed from the NCEP-CFSR winds. The characteristics of the cyclones are obtained by diagnostic variables sampled within a radial distance from the cyclone centers to produce the spatial distribution of cyclone properties at the time of genesis. Also, cyclone centered composites are used to analyze the cyclone structure and evolution during their genesis. There are four main cyclogenesis regions in the South Atlantic Ocean: the Southern Brazilian coast (SE-BR, 30. S), over the continent near the La Plata river discharge region (LA PLATA, 35. S), the southeastern coast of Argentina (ARG, 40.S- 55. S) and the Southeastern Atlantic (SE-SAO, centered at 45. S and 10. W). We found that cyclogenesis northward of 35. S occurs mainly due to low-level forcing associated with moisture transport in the summer, and is associated with upper-level forcing in the winter due to a strong baroclinic environment. Southward of 35.S, cyclones develop in a high baroclinic environment throughout the year with only a small influence from moist processes. The cyclone composites reveal that SE-BR and SE-SAO cyclones are associated with secondary development, the LA PLATA cyclones development is influenced by an orographic low in their early stages, and ARG cyclones are influenced by thermal advection as an essential mechanism in the reduction of static stability. |
英文关键词 | Cyclogenesis Extratropical cyclones South America Storm track |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000489753900023 |
WOS关键词 | EXTRATROPICAL CYCLONES ; SYNOPTIC CLIMATOLOGY ; LIFE-CYCLE ; HEMISPHERE ; CYCLOGENESIS ; BRAZIL ; EVOLUTION ; TRACKING ; MODEL ; WAVES |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/187212 |
专题 | 气候变化 |
作者单位 | 1.Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Dept Ciencias Atmosfer, Rua Matao 1226, Sao Paulo, SP, Brazil; 2.Univ Reading, Dept Meteorol, Reading, Berks, England |
推荐引用方式 GB/T 7714 | Gramcianinov, C. B.,Hodges, K. I.,Camargo, R.. The properties and genesis environments of South Atlantic cyclones[J]. CLIMATE DYNAMICS,2019,53:4115-4140. |
APA | Gramcianinov, C. B.,Hodges, K. I.,&Camargo, R..(2019).The properties and genesis environments of South Atlantic cyclones.CLIMATE DYNAMICS,53,4115-4140. |
MLA | Gramcianinov, C. B.,et al."The properties and genesis environments of South Atlantic cyclones".CLIMATE DYNAMICS 53(2019):4115-4140. |
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