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Journal of Tropical Oceanography ›› 2012, Vol. 31 ›› Issue (4): 58-65.doi: 10.11978/j.issn.1009-5470.2012.04.008cstr: 32234.14.j.issn.1009-5470.2012.04.008

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Analysis of the subtropic-high ridge anomaly in the mid latitude over the northwestern Pacific in May to June 2005

ZHAI Liang1, ZHANG Xiu-zhi2, SUN Ji-lin3, L? Xin-yan4   

  1. 1. Beijing Meteorological Bureau, Beijing 100089, China; 
    2. National Climate Center, Beijing 100081, China; 
    3. College of Marine Environment of Ocean University of China, Qingdao 266003, China; 
    4. National Meteorological Center, Beijing 100081, China
  • Received:2010-12-30 Revised:2011-02-26 Online:2012-10-22 Published:2012-10-24

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Abstract:

The singular value decomposition (SVD) analysis showed that the air-sea interaction is strong in 20?235篘 and 120? 1165篍 (referred to as the the key area). There is significant connection between sea-surface temperature (SST) change and 500-hPa geopotential height in the region. Analysis also showed that there is a strong upward motion and a strong latent-heat release in the key area in May and June 2005, and that it is one of the reasons that caused the subtropical high southerly and stably. A positive feedback may exist between the SST and the subtropical high in the key area. SST increased north of the key area, which may also be a reason that led to the northwestern Pacific subtropical high to rapidly move northward by the end of June.

Key words: singular value decomposition, SST anomaly, subtropical high, ocean-atmosphere interaction

CLC Number: 

  • P732