Marked freshening of North Pacific subtropical mode water in 2009 and 2010: Influence of freshwater supply in the 2008 warm season

Shusaku Sugimoto, Nobuto Takahashi, Kimio Hanawa

研究成果: Article査読

12 被引用数 (Scopus)

抄録

Changes in salinity of the North Pacific subtropical mode water (STMW) were investigated using profiles for 2003-2011. In 2009 and 2010, the STMW freshened markedly (S < 34.7 psu), with salinity 0.1 psu lower than other years. Freshening in 2009 was caused by excess rainfall in the 2008 warm season, which was related to an increase in the number of low pressures passing over the STMW formation region associated with a southeastward shrinkage of the summertime North Pacific subtropical high. The freshening signal persisted under the seasonal pycnocline during the 2009 warm season. This resulted in the freshening of STMW in 2010. Key Points We investigated salinity changes using Argo float The STMW freshened markedly in 2009 and 2010 The freshening was caused by excess rainfall in the 2008 warm season

本文言語English
ページ(範囲)3102-3105
ページ数4
ジャーナルGeophysical Research Letters
40
12
DOI
出版ステータスPublished - 2013 6 28

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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