Decadal variations in mixed layer salinity in the Kuroshio Extension recirculation gyre region: influence of precipitation during the warm season

作者：Kitamura Tomoyuki; Nakano Toshiya; Sugimoto Shusaku

来源：Journal of Oceanography, 2016, 72(2): 167-175.

DOI：10.1007/s10872-015-0317-1

• Kuroshio Extension recirculation gyre region
• Mixed layer salinity
• Precipitation
• Pacific-Japan (PJ) teleconnection pattern
• Storm track

The salinity of the mixed layer in the Kuroshio Extension recirculation gyre (KERG) region (28A degrees-35A degrees N, 141A degrees-160A degrees E) was examined over a period of 20 years (1993-2012), and was found to show low-frequency variations on a decadal (similar to 10 years) timescale: salinity decreased during the periods 1995-2001 and 2006-2009, but increased over the periods 2002-2005 and 2010-2012. Salinity anomalies at the sea surface during the warm season (June-October) influenced salinity in the following winter. These warm-season anomalies were caused by precipitation changes related to the number of low-pressure systems passing over the KERG associated with a westward elongation/eastward shrinkage of the summertime North Pacific subtropical high, which is driven by the Pacific-Japan (PJ) teleconnection pattern.

• 出版日期2016-4
• 单位中国气象科学研究院