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SUN Ruili,LING Zheng,CHEN Changlin,YAN Yunwei. 2015. Interannual variability of thermal front west of Luzon Island in boreal winter. Acta Oceanologica Sinica, 34(11):102-108
Interannual variability of thermal front west of Luzon Island in boreal winter
冬季吕宋岛西温度锋的年际变化
Received:March 05, 2015  Revised:May 26, 2015
DOI:10.1007/s13131-015-0753-1
Key words:thermal front  interannual variability  Luzon Island  ENSO  South China Sea
中文关键词:  温度锋  年际变化  吕宋岛  厄尔尼诺  南海
基金项目:The Distinguished Young Scholars of National Natural Science Foundation of China under contract Nos 41125019 and 41306024; the National Basic Research Program (973 Program) of China under contract No. 2013CB430301; the Basic Scientific Research Fund of Second Institute of Oceanography, State Oceanic Administration under contract No. JT1301; the National Natural Science Foundation under contract No. 41476002.
Author NameAffiliationE-mail
SUN Ruili College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China 
 
LING Zheng State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China zhengling_hust@sina.com 
CHEN Changlin State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China  
YAN Yunwei State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China  
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Abstract:
      Interannual variability of thermal front west of Luzon Island during the winter of 1993-2013 is examined with the method of singular value decomposition (SVD) and a suite of satellite measurements in this paper. It is found that both the area and intensity of the thermal front west of Luzon Island show apparent interannual variability. Further study based on SVD shows that the interannual variability of the thermal front is highly associated with El Niño and Southern Oscillation (ENSO), and the correlation coefficient between Niño3.4 index and the first Principal Component (PC1) of thermal front can reach -0.65. The mechanism can be described as follows. In El Niño (La Ni.a) years, the East Asian winter monsoon (EAWM) is weakened (enhanced), inducing weaker (stronger) local wind stress curl (WSC) west of Luzon Island, and resulting in weakened (enhanced) Luzon cold eddy, which finally leads to the weakening (enhancement) of the thermal front.
中文摘要:
      本文利用奇异值分解方法(SVD)和一些卫星数据,研究了1993至2013年冬季吕宋岛西温度锋的年际变化,发现吕宋岛西温度锋的面积和强度都有明显的年际变化.利用SVD进一步研究发现,温度锋的年际变化与厄尔尼诺现象高度相关,且Niño3.4指数和温度锋的第一主成分的相关系数可以达到-0.65.其动力机制描述如下:在厄尔尼诺(拉尼娜)年,东亚季风减弱(加强),引起更弱的(更强的)局地风应力,导致了吕宋冷涡减弱(加强),最后导致了温度锋减弱(加强).
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