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Distribution of the partial pressure of CO2 in surface water (pCO2w) between Japan and the Hawaiian Islands: pCO2wSST relationship in the winter and summer

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Title: Distribution of the partial pressure of CO2 in surface water (pCO2w) between Japan and the Hawaiian Islands: pCO2wSST relationship in the winter and summer
Authors: Yoshikawa, Hisayuki1 Browse this author →KAKEN DB
Ishii, Masao Browse this author
Matsueda, Hidekazu Browse this author
Kawano, Takeshi Browse this author
Takasugi, Yoshio Browse this author
Authors(alt): 吉川, 久幸1
Keywords: Oceanic CO2
North Pacific Subtropical Gyre
pCO2
Seasonal Variation
Sea Surface Temperature
Issue Date: Apr-2003
Publisher: Blackwell
Journal Title: Tellus B
Volume: 55
Issue: 2
Start Page: 456
End Page: 465
Publisher DOI: 10.1034/j.1600-0889.2003.01482.x
Abstract: On the basis of measurements of the partial pressure of carbon dioxide in surface seawater (pCO2w) between Japan and the Hawaiian Islands in winter and summer, we examined the relationship between the pCO2w and the sea surface temperature (SST) in the North Pacific Subtropical Gyre (NPSG). In winter, the pCO2w correlated well with the SST (0.14-0.24 %°C-1), suggesting a monotonous change in the carbonate system. However, in summer, five different pCO2w-SST relationships were found in the NPSG including the Kuroshio Extension due to changes in the relative contribution of ocean dynamics (upwelling, vertical mixing, and advection), the biological activity under the absence (very low level) of macro-nutrients, and thermodynamics. The increase in the pCO2w against the unit increase in the SST from January to July was low (<2.5%°C-1) west (leeward side) of the Hawaiian Islands (19-22˚N, 158-168˚W) and in the Kuroshio Extension (33-35ºN, 140-165ºE), and high (~3%°C-1) south of the Kuroshio Extension (25-30°N, 180-165°W) and the Hawaiian Islands (15-19°N, 157-162˚W). This suggested that the drawdown of dissolved inorganic carbon was affected by the enhanced biological activity due to upwelling events associated with eddies and/or the transport of dissolved nutrients from gyre edges to the interior.
Rights: Copyright (c) 2003 Blackwell Munksgaad. Published on behalf of the Swedish Geophysical Society
Type: article (author version)
URI: http://hdl.handle.net/2115/630
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 吉川 久幸

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OAI-PMH ( junii2 , jpcoar )


 

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