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

被引:17
作者
Sugimoto, Shusaku [1 ]
Takahashi, Nobuto [2 ]
Hanawa, Kimio [1 ]
机构
[1] Tohoku Univ, Dept Geophys, Grad Sch Sci, Sendai, Miyagi 9808578, Japan
[2] Miyagi Univ, Sch Food Agr & Environm Sci, Sendai, Miyagi, Japan
基金
日本学术振兴会;
关键词
North Pacific subtropical mode water; winter mixed layer; salinity; freshwater supply; Argo float; MIXED-LAYER; VARIABILITY;
D O I
10.1002/grl.50600
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
[1] 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<34.7psu), with salinity 0.1psu 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.
引用
收藏
页码:3102 / 3105
页数:4
相关论文
共 22 条
[2]  
Boyer T. P., 2009, WORLD OCEAN DATABASE
[3]   Variability of core layer temperature (CLT) of the North Pacific subtropical mode water [J].
Hanawa, K ;
Kamada, J .
GEOPHYSICAL RESEARCH LETTERS, 2001, 28 (11) :2229-2232
[4]  
Hanawa K., 2001, Ocean Circulation and Climate: Observing and Modeling the Global Ocean, P373, DOI DOI 10.1016/S0074-6142(01)80129-7
[5]  
HANAWA K, 2001, J OCEANOGR, V57, P679, DOI DOI 10.1023/A:1021276224519
[6]  
Hosoda S., 2008, JAMSTEC Rep. Res. Dev, V8, P47, DOI [10.5918/jamstecr.8.47, DOI 10.5918/JAMSTECR.8.47]
[7]  
Kawai H, 1972, Kuroshio, its physical aspects, P235
[8]   North Atlantic Subtropical Mode Water: A history of ocean-atmosphere interaction 1961-2000 [J].
Kwon, YO ;
Riser, SC .
GEOPHYSICAL RESEARCH LETTERS, 2004, 31 (19) :L193071-4
[9]   SUBTROPICAL MODE WATER [J].
MASUZAWA, J .
DEEP-SEA RESEARCH, 1969, 16 (05) :463-&
[10]   Future Change in Extratropical Cyclones Associated with Change in the Upper Troposphere [J].
Mizuta, Ryo ;
Matsueda, Mio ;
Endo, Hirokazu ;
Yukimoto, Seiji .
JOURNAL OF CLIMATE, 2011, 24 (24) :6456-6470