2009 Fiscal Year Final Research Report
Analysis of biogeochemical changes in the North Pacific using long-term time-series data of dissolved oxygen
| Project/Area Number |
19510021
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Japan, Meteorological Research Institute |
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Principal Investigator |
ISHII Masao Japan, Meteorological Research Institute, 地球化学研究部, 主任研究官 (70354553)
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| Co-Investigator(Kenkyū-buntansha) |
SASANO Daisuke 気象庁気象研究所, 地球化学研究部, 研究官 (10462524)
TOKIEDA Takayuki 気象庁気象研究所, 地球化学研究部, 主任研究官 (90354555)
NAKANO Toshiya 気象庁気象研究所, 海洋研究部, 主任研究官 (40354550)
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| Co-Investigator(Renkei-kenkyūsha) |
MATSUEDA Hidekazu 気象庁気象研究所, 地球化学研究部, 室長 (60354552)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 溶存酸素 / 酸素センサー / 物質循環 / 気候変動 |
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| Research Abstract |
Data of dissolved oxygen in the western North Pacific were compiled and quality-checked by a statistical technique. The errors due to interpolation of discrete oxygen data were also evaluated by comparing with vertical continuous data obtained by a new rapid-response oxygen sensor that was introduced and examined in this study. In the northern subtropical and subarctic zones, significant trend of oxygen decreases were determined at depths between 500m and 2000m. These decreasing trend are mainly attributable to the decrease in density that is associated with ocean warming, but those at the depth around 1000m is ascribed to the changes in the ocean circulation.
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