Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0017.1 |
Characterizing the Synoptic Expression of the Angola Low | |
Howard, Emma; Washington, Richard | |
2018-09-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:17页码:7147-7165 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | The Angola low is a key feature of the southern Africa wet season atmosphere that influences precipitation across the continent. This paper uses ERA-Interim to show that the synoptic expression of the Angola low is a combination of dry heat lows and moist tropical low pressure systems. The Angola heat low and Angola tropical low composites are contrasted against similar lows observed in other continental tropical regions and found to be broadly comparable. The implications that the distinction between dry and moist events has for the interannual relationship among the Angola low, precipitation, and ENSO are examined. The tropical lows exhibit unusual semistationary behavior by lingering in the Angola region rather than traveling offshore. This behavior is proposed to be caused by an integrated sea breeze-anabatic wind that enhances (inhibits) cyclonic vorticity stretching and convection inland (near the coast). The combined effect of the heat lows and the anchored tropical lows creates the Angola low in the climatological average. By elucidating the mechanisms of the Angola low, this research improves the foundation of process-based evaluation of southern Africa present and future climate in CMIP and AMIP models. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450691900001 |
WOS关键词 | SOUTHERN AFRICA ; HEAT LOWS ; RAINFALL ; CLIMATE ; DYNAMICS ; VARIABILITY ; AUSTRALIA ; IMPACTS ; SEASON ; OCEAN |
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/21077 |
专题 | 气候变化 |
作者单位 | Univ Oxford, Sch Geog & Environm, Oxford, England |
推荐引用方式 GB/T 7714 | Howard, Emma,Washington, Richard. Characterizing the Synoptic Expression of the Angola Low[J]. JOURNAL OF CLIMATE,2018,31(17):7147-7165. |
APA | Howard, Emma,&Washington, Richard.(2018).Characterizing the Synoptic Expression of the Angola Low.JOURNAL OF CLIMATE,31(17),7147-7165. |
MLA | Howard, Emma,et al."Characterizing the Synoptic Expression of the Angola Low".JOURNAL OF CLIMATE 31.17(2018):7147-7165. |
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