A POSSIBLE IMPACT OF ELNi?o MODOKI ON SEA SURFACE TEMPERATURE OF CHINA’S OFFSHORE AND ITS ADJACENT REGIONS

TAN Hong-jian; CAI Rong-shuo

Abstract:

El Niño Modoki, similar to but different from canonical El Niño, has been observed since the late 1970s. In this paper, using HadISST and NCEP/NCAR wind data, we analyze the relationship between El Niño Modoki and Sea Surface Temperature (SST) in the offshore area of China and its adjacent waters for different seasons. Our results show a significant negative correlation between El Niño Modoki in summer and SST in autumn in the offshore area of China and its adjacent waters, particularly for regions located in the east of the Kuroshio. It is also found that during El Niño Modoki period, anomalous northerlies prevail over the regions from the northern part of the Philippines to the offshore area of China, indicating that the northerlies are unfavorable for the transport of warm water from the western tropical Pacific to the mid-latitude area. Consequently, El Niño Modoki in summer may play a substantial role in cold SST anomalies in the offshore area of China and its adjacent waters in autumn through the influence of the Kuroshio, with a lagged response of the ocean to the atmospheric wind field.

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TAN Hong-jian, CAI Rong-shuo. A POSSIBLE IMPACT OF ELNi?o MODOKI ON SEA SURFACE TEMPERATURE OF CHINA’S OFFSHORE AND ITS ADJACENT REGIONS [J]. Journal of Tropical Meteorology, 2014, 20(1): 1-7.

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A POSSIBLE IMPACT OF ELNi?o MODOKI ON SEA SURFACE TEMPERATURE OF CHINA’S OFFSHORE AND ITS ADJACENT REGIONS

Key Laboratory of Global Change and Marine-Atmospheric Chemistry, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005 China Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100190

Received Date: 2013-03-11

Rev Recd Date: 2014-01-15

Abstract: El Niño Modoki, similar to but different from canonical El Niño, has been observed since the late 1970s. In this paper, using HadISST and NCEP/NCAR wind data, we analyze the relationship between El Niño Modoki and Sea Surface Temperature (SST) in the offshore area of China and its adjacent waters for different seasons. Our results show a significant negative correlation between El Niño Modoki in summer and SST in autumn in the offshore area of China and its adjacent waters, particularly for regions located in the east of the Kuroshio. It is also found that during El Niño Modoki period, anomalous northerlies prevail over the regions from the northern part of the Philippines to the offshore area of China, indicating that the northerlies are unfavorable for the transport of warm water from the western tropical Pacific to the mid-latitude area. Consequently, El Niño Modoki in summer may play a substantial role in cold SST anomalies in the offshore area of China and its adjacent waters in autumn through the influence of the Kuroshio, with a lagged response of the ocean to the atmospheric wind field.

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A POSSIBLE IMPACT OF ELNi?o MODOKI ON SEA SURFACE TEMPERATURE OF CHINA’S OFFSHORE AND ITS ADJACENT REGIONS

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