热带气象学报2018，Vol.34Issue(2)：162-176,15.DOI:10.16032/j.issn.1004-4965.2018.02.003
ENSO位相转换期北太平洋热带外大气对热带东太平洋海温的影响
ANALYSES OF THE IMPACTS OF EXTRATROPICAL ATMOSPHERE IN THE NORTH PACIFIC ON THE SST AROUND TROPICAL EASTERN PACIFIC DURING ENSO TRANSITION PHASE
摘要
Abstract
Using the composite analysis,correlation analysis and SVD methods,the impacts of extratropical atmosphere in the North Pacific on the sea surface temperature (SST) around tropical eastern Pacific during ENSO transition phase are analyzed by using the global atmospheric reanalysis datasets from NCEP/NCAR,ERSST.V4 from NOAA and ORAS4 from ECMWF.The results are as follows:(1) The positive SLPA of the key area (155～130 °W,10～30 °N) in June are strongly correlated with the negative SSTA around tropical eastern Pacific over the same phase and later.The probability of the positive SLPA in the key area for the E-L type,in which an La Ni(n)a occurs in the following year of El Ni(n)o,is greater than the E-N type,in which no event occurs in the following year of an El Ni(n)o event;(2) The results between the SLP in the North Pacific from March to June and the SST in December by means of SVD methods also confirm the negative correlation between the SLPA in the key area and the SSTA around tropical eastern Pacific;(3)The propagation of the positive phase of OKJ wave train in June may contribute to the positive SLPA in the key area;(4) The positive SLPA in the key area in June may result in more southward surface current velocity anomalies around the key area from July to September,which may contribute to transmit more cold water from the middle latitude to the equator.It may cause the negative SSTA around tropical eastem Pacific in December,to some extent,which may be conducive to the formation of La Ni(n)a.关键词
ENSO/海平面气压异常/海温异常/SVD分解/OKJ波列/海表流速异常Key words
ENSO/SLPA/SSTA/SVD methods/OKJ wave train/sea surface current anomaly分类
海洋科学引用本文复制引用
薛一迪,王亚非..ENSO位相转换期北太平洋热带外大气对热带东太平洋海温的影响[J].热带气象学报,2018,34(2):162-176,15.基金项目
资助项目:国家自然科学基金(41575055)资助 （41575055）
