气候变化领域集成服务门户(CCPortal): Moisture sources associated with heavy rainfall over the Limpopo River Basin; southern Africa

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DOI	10.1007/s00382-020-05336-w
	Moisture sources associated with heavy rainfall over the Limpopo River Basin; southern Africa
	Rapolaki R.S.; Blamey R.C.; Hermes J.C.; Reason C.J.C.
发表日期	2020
ISSN	0930-7575
起始页码	1473
结束页码	1487
卷号	55
英文摘要	Moisture sources and pathways over the Limpopo River Basin (LRB) in southern Africa were identified using the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model applied to NCEP II (2.5° × 2.5°) reanalysis data for 1981–2016. The 10-day air parcel backward trajectories were produced for the extended wet season (October–April) as well as the early and late summer. Analysis of a 36-year climatology of air parcel trajectories indicated seven moisture source regions for the LRB; namely, local continental, tropical southeast Atlantic Ocean, midlatitude South Atlantic Ocean, tropical northwest Indian Ocean, tropical southwest Indian Ocean, subtropical southwest Indian Ocean, and the Agulhas Current. The results have shown that important differences in moisture source regions and pathways exist between early (October–December) and late (January–April) summers, with the tropical northwestern Indian Ocean and the northern Agulhas Current sources more prominent during JFMA than OND. On interannual time scales, there are notable differences in moisture source regions between anomalously wet and dry summers, with the South Indian Ocean moisture contribution and transport over the LRB smaller during dry summers than wet summers. Changes in specific humidity for trajectory linked to heavy daily rainfall events (defined from CHIRPS data) showed that subtropical South Indian Ocean source is more extensive for the heavy rainfall than for the moderate case. Generally, moisture source regions and transport pathways for LRB tend to be influenced by both the regional summer season circulation and the synoptic setting. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	HYSPLIT; Limpopo River Basin; Moisture-transport; Rainfall; Southern Africa
语种	英语
scopus关键词	annual variation; atmospheric moisture; climate modeling; rainfall; regional climate; seasonal variation; summer; timescale; trajectory; Agulhas Current; Indian Ocean; Limpopo Basin
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145352
作者单位	Department of Oceanography, University of Cape Town, Private Bag X3, Rondebosch, Cape Town, 7701, South Africa; SAEON Egagasini Node, Private Bag X2, Roggebaai, Cape Town, 8012, South Africa
推荐引用方式 GB/T 7714	Rapolaki R.S.,Blamey R.C.,Hermes J.C.,et al. Moisture sources associated with heavy rainfall over the Limpopo River Basin; southern Africa[J],2020,55.
APA	Rapolaki R.S.,Blamey R.C.,Hermes J.C.,&Reason C.J.C..(2020).Moisture sources associated with heavy rainfall over the Limpopo River Basin; southern Africa.Climate Dynamics,55.
MLA	Rapolaki R.S.,et al."Moisture sources associated with heavy rainfall over the Limpopo River Basin; southern Africa".Climate Dynamics 55(2020).