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热带海洋学报 ›› 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

• 海洋气象学 • 上一篇    下一篇

2005年5—6月西北太平洋副热带高压位置异常可能原因浅析

翟亮1, 张秀芝2, 孙即霖3, 吕心艳4   

  1. 1. 北京市气象局, 北京 100089; 
    2. 国家气候中心, 北京 100081;
    3. 中国海洋大学海洋环境学院, 山东 青岛 266003; 
    4. 国家气象中心, 北京 100081
  • 收稿日期:2010-12-30 修回日期:2011-02-26 出版日期:2012-10-22 发布日期:2012-10-24
  • 作者简介:翟亮(1980—), 男, 内蒙古赤峰市人, 硕士, 从事天气预报工作。E-mail: liang6302@163.com
  • 基金资助:

    国家自然科学基金重点项目(40930844、10735030); 国家自然科学基金项目(40676012)

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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摘要：

通过奇异值分解(SVD)分析表明, 20o—35oN、120o—165oE为强海气相互作用区(简称为关键区); 该区域SST变化与500hPa位势高度场有较密切的关系, 分析发现2005年5—6月关键区存在较强的上升运动和强烈的潜热释放, 并初步认为这是造成副热带高压稳定偏南的原因之一, 且关键区SST的偏冷与副热带高压持续偏南之间存在一个正反馈机制。关键区北部海面温度升高也可能是西北太平洋副热带高压在6月底的最终北抬的原因之一。

关键词: 奇异值分解, 海温异常, 副热带高压, 海气相互作用

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

中图分类号: 

  • P732