DOI: 10.1007/s00382-015-2477-5
Scopus记录号: 2-s2.0-84945438597
论文题名: Initiation and amplification of the Ningaloo Niño
作者: Marshall A.G. ; Hendon H.H. ; Feng M. ; Schiller A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-09-10 起始页码: 2367
结束页码: 2385
语种: 英语
英文关键词: Air–sea coupling
; Leeuwin Current
; Marine heat wave
; Ningaloo Niño
; West Australian coast
英文摘要: Marine heat waves along the Western Australian coast are potentially damaging to the marine environment especially coastal fisheries and the Ningaloo Reef. Initiation and amplification mechanisms for marine heat waves (referred to as ‘Ningaloo Niño’ events) are explored using ocean and atmosphere reanalyses for the period 1960–2011. We find that the onset stage from October to November is promoted by wind-evaporation-SST feedback that operates to the northwest of the coast on the north-eastern flank of the Mascarene subtropical high: cyclonic anomalies act to reduce the surface wind speed and warm the ocean surface, thereby driving increased rainfall and stronger cyclonic anomalies. The growth and southward expansion of positive SST anomalies along the Australian west coast is further supplemented by anomalous poleward advection of heat by the Leeuwin Current, which is coupled with the cyclonic anomalies off the coast. The strongest Ningaloo Niño events, such as the record strong 2011 event, occur in conjunction with La Niña conditions in the Pacific, which drives westerly wind anomalies to the northwest of Australia that can promote the WES feedback and accelerate the Leeuwin Current via transmission of thermocline anomalies from the western Pacific onto the west Australian coast. However, many Ningaloo Niño events occur independent of La Niña and some Ningaloo Niño events even occur during certain El Niños. We explain this general independence from ENSO because the triggering of Ningaloo Niño events from the Pacific is most sensitive to antecedent SST anomalies in the far western Pacific, rather than in the central Pacific where ENSO typically has greatest magnitude. © 2015, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53944
Appears in Collections: 过去全球变化的重建
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作者单位: Australian Bureau of Meteorology, Hobart, TAS, Australia; Australian Bureau of Meteorology, Melbourne, VIC, Australia; CSIRO Marine and Atmospheric Research, Floreat, WA, Australia; CSIRO Marine and Atmospheric Research, Hobart, TAS, Australia
Recommended Citation:
Marshall A.G.,Hendon H.H.,Feng M.,et al. Initiation and amplification of the Ningaloo Niño[J]. Climate Dynamics,2015-01-01,45(2017-09-10)