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

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• 作者：Tomoyuki Kitamura ; Toshiya Nakano ; Shusaku Sugimoto
• 关键词：Kuroshio Extension recirculation gyre region ; Mixed layer salinity ; Precipitation ; Pacific–Japan (PJ) teleconnection pattern ; Storm track
• 刊名：Journal of Oceanography
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：72
• 期：2
• 页码：167-175
• 全文大小：2,101 KB
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• 作者单位：Tomoyuki Kitamura (1) (2) (4)
  Toshiya Nakano (1) (2)
  Shusaku Sugimoto (3)
  
  1. Global Environment and Marine Department, Japan Meteorological Agency, 1-3-4 Otemachi, Chiyoda-ku, Tokyo, 100-8122, Japan
  2. Oceanography and Geochemistry Research Department, Meteorological Research Institute, 1-1 Nagamine, Tsukuba, 305-0052, Japan
  4. Ocean and Earth Division, Research and Development Bureau, Ministry of Education, Culture, Sports, Science and Technology, 3-2-2 Kasumigaseki, Chiyoda-ku, Tokyo, 100-8959, Japan
  3. Department of Geophysics, Graduate School of Science, Tohoku University, 6-3 Aramaki-aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Oceanography
  Hydrobiology
  
• 出版者：Springer Netherlands
• ISSN：1573-868X

文摘

The salinity of the mixed layer in the Kuroshio Extension recirculation gyre (KERG) region (28°–35°N, 141°–160°E) was examined over a period of 20 years (1993–2012), and was found to show low-frequency variations on a decadal (~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.