GSTDTAP  > 气候变化
DOI10.1002/joc.5085
Characterization of convective systems and their association with African easterly waves
Semunegus, Hilawe1,2; Mekonnen, Ademe2; Schreck, Carl J., III1,2,3
2017-10-01
发表期刊INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN0899-8418
EISSN1097-0088
出版年2017
卷号37期号:12
文章类型Article
语种英语
国家USA
英文摘要

This study investigates the relationship between African easterly waves (AEWs) and different types of deep convection. It is known that AEWs impact the development of deep convection over tropical North Africa and tropical cyclone formation over the eastern Atlantic. However, the process of how AEWs interact with deep convection is not well understood. Composite analysis based on a 24-year data set of cloud systems (CS) from the International Satellite Cloud Climate Project shows that the relationship changes with various types of convection over this region. This phase change relationship analysis may shed light into the dynamics of AEWs and improve the ability of forecasters to anticipate associated rainfall over the Sahel. Weak and disorganized convective systems (WDCSs; 50km100km increase in frequency within and to the west of the AEW-trough zone. MCSs are common features of summer in northwestern Africa. Our results indicate that the association between AEWs and deep convection is different and changes across North Africa. Weak AEWs over East Africa have a stronger relationship with WDCSs, while mature AEWs over West Africa have more MCS activity. This evolution suggests that the organization of convection from WDCS to MCS may play a critical role in AEW development. This hypothesis contrasts the traditional view that treats convection uniformly.


英文关键词African easterly waves AEW convective systems African easterly jet ISCCP
领域气候变化
收录类别SCI-E
WOS记录号WOS:000412095400020
WOS关键词3-DIMENSIONAL STRUCTURE ; LIFE-CYCLE ; PHASE-III ; DISTURBANCES ; DYNAMICS ; GENERATION ; ENERGETICS ; COMPLEXES ; ORIGIN ; ISCCP
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/37084
专题气候变化
作者单位1.NOAA, NCEI, 151 Patton Ave, Asheville, NC 28801 USA;
2.North Carolina A&T State Univ, Energy & Environm Syst Dept, Greensboro, NC USA;
3.North Carolina State Univ, CICS NC, Asheville, NC USA
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Semunegus, Hilawe,Mekonnen, Ademe,Schreck, Carl J., III. Characterization of convective systems and their association with African easterly waves[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37(12).
APA Semunegus, Hilawe,Mekonnen, Ademe,&Schreck, Carl J., III.(2017).Characterization of convective systems and their association with African easterly waves.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37(12).
MLA Semunegus, Hilawe,et al."Characterization of convective systems and their association with African easterly waves".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37.12(2017).
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