Interannual variability of thermal front west of Luzon Island in boreal winter  

作　　者：SUN Ruili LING Zheng CHEN Changlin YAN Yunwei 

机构地区：[1]College of Physical and Environmental Oceanography, Ocean University of China [2]State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography,State Oceanic Administration

出　　处：《Acta Oceanologica Sinica》2015年第11期102-108,共7页海洋学报（英文版）

基　　金：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

摘　　要：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 E1 Nifio and Southern Oscillation （ENSO）, and the correlation coefficient between Nifio3.4 index and the first Principal Component （PC1） of thermal front can reach -0.65. The mechanism can be described as follows. In E1 Nifio （La Nifia） 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.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 E1 Nifio and Southern Oscillation （ENSO）, and the correlation coefficient between Nifio3.4 index and the first Principal Component （PC1） of thermal front can reach -0.65. The mechanism can be described as follows. In E1 Nifio （La Nifia） 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.

关 键 词：thermal front interannual variability Luzon Island ENSO South China Sea 

分 类 号：P731.27[天文地球—海洋科学]