북태평양 혼합층깊이와 클로로필 변동성

Title
북태평양 혼합층깊이와 클로로필 변동성
Alternative Title
Variability of mixed layer depth and its relation with chlorophyll concentration in the North Pacific Ocean
Author(s)
장찬주; 유신재
KIOST Author(s)
Jang, Chan Joo(장찬주)
Publication Year
2010-10-26
Abstract
Mixed layer depth (MLD) affects phytoplankton dynamics through controlling the availability of nutrients and light in the upper ocean. This study investigates variability of MLD and its relation with chlorophyll (CHL) in the North Pacific Ocean on seasonal to year-to-year timescales. The Pacific MLD field was calculated from SODA (Simple Ocean Data Assimilation) version 2.1.6 covering 51 years from January 1958 to December 2008. MLD was defined as the depth at which the potential density takes the reference depth (10 m) salinity value and the temperature value which is 0.2 degree centigrade lower than the reference value. The variability of maximum MLD is well correlated with CHL variability in some regions in the North Pacific Ocean including the Kuroshio Extension (KE). For example, increased maximum MLDs in the years of 2003-2007 compared with values in the years of 1998-2002 correspond to enhanced CHLs in the KE. The good correspondence between MLD and CHL suggests that increased maximum MLD helps to entrain deep nutrient into the upper ocean and thus to maintain high CHL in the KE. Changes in primary production based on nutrient entrainment by wind mixing at selected locations in the North Pacific also will be given and compared with observation.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/28677
Bibliographic Citation
북태평양해양과학기수(PICES) 2010년 총회, pp.97 - 98, 2010
Publisher
PICES
Type
Conference
Language
English
Publisher
PICES
Related Researcher
Research Interests

upper ocean dynamics,regional climate modeling,ocean climate change,해양상층역학,지역기후모델링,해양기후변화

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