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북동태평양 KODOS 해역의 유기탄소 및 겉보기산소량 특성

Characteristics of Organic Carbon and Apparent Oxygen Utilization in the NE Pacific KODOS Area

손주원|손승규|박용철|김기현|김경홍|김동화|김태하
한국해양과학기술원 (Korea Institute of Ocean Science & Technology)|2005.03|Ocean and Polar Research|제27권 제1호|pp. 1-13

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참고문헌

키워드

TOC총유기탄소북동 적도 태평양겉보기산소량입자유기 탄소Northeast Equatorial PacificAOUPOC
주제분류해양학

초록

Abstract

The samples for organic carbon analysis were collected between 5o and 17oN along 131.5oW in the northeast Pacific KODOS (Korea Deep Ocean Study) area. The mean concentration of total organic carbon (TOC) in the surface mixed layer (~50 m) was 100.13 2.05 mM-C, while the mean concentration of TOC in the lower 500 m of the water column was 50.19 4.23 mM-C. A strong linear regression between TOC and temperature (r2 = 0.70) showed that TOC distribution was controlled by physical process. Results from the linear regression between chlorophyll-a and TOC, and between chlorophyll-a and particulate organic carbon (POC), decreasing of dissolved organic carbon (DOC) in the surface layer caused by non-biological photo-oxidation process. Below the surface layer, biological production and consumption occurred. DOC accumulation dominated in the depth range of 30~50 m and DOC consumption occurred in the depth range of 50~200 m. TOC was inversely correlated with apparent oxygen utilization (AOU) and TOC/AOU molar ratios ranged from -0.077 to -0.21. These ratios indicated that TOC oxidation was responsible for 10.9~30.1% (mean 20.2%) of oxygen consumption in the NE Pacific KODOS area. In the euphotic zone, distributions of dissolved and particulate organic matter were controlled by photo-chemical, chemical, biological and physical processes.

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