DOI: 10.1007/s00382-013-1917-3
Scopus记录号: 2-s2.0-84895029402
论文题名: Why were some La Niñas followed by another La Niña?
作者: Hu Z.-Z. ; Kumar A. ; Xue Y. ; Jha B.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-03-04 起始页码: 1029
结束页码: 1042
语种: 英语
英文关键词: Multi-year La Nina
; Oceanic Kelwin wave
; Recharge and discharge processes
; Surface wind stress divergence in far-western Pacific
英文摘要: This paper investigates why some La Niña events are followed by another La Niña and some others are not. We propose two preconditions that result in continuation of a La Niña. The first one is that La Niña must be a strong event (a major La Niña). This ensures that the reflected Rossby wave signal at the eastern boundary of the Pacific has a strong westward propagating cold ocean temperature anomaly over the off-equatorial region. The off-equator cold anomaly may not be conducive to the equatorial recharge process, and as a result, may favor the persistence of cold ocean subsurface temperature anomaly and prevent the transition from La Niña to El Niño. The second precondition is whether there are eastward propagating downwelling Kelvin waves during the decay phase of a major La Niña. Eastward propagating downwelling Kelvin waves could lead to demise for a tendency for a follow-up La Niña. The equatorial Kelvin wave activities are associated with fluctuations of surface wind in the equatorial far-western Pacific. The analysis suggests that both the surface wind in the equatorial far-western Pacific and the recharge/discharge of the equatorial Pacific are indicators for occurrence or no occurrence of a follow-up La Niña event. © 2013 Springer-Verlag (outside the USA). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54303
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: NCEP/NWS/NOAA, Climate Prediction Center, 5830 University Research Court, College Park, MD, 20740, United States; WYLE Science, Technology and Engineering Group, Houston, TX, United States
Recommended Citation:
Hu Z.-Z.,Kumar A.,Xue Y.,et al. Why were some La Niñas followed by another La Niña?[J]. Climate Dynamics,2014-01-01,42(2017-03-04)