북동 적동태평양 유광층의 총유기탄소 및 무기영양염의 수직분포 특성

Title
북동 적동태평양 유광층의 총유기탄소 및 무기영양염의 수직분포 특성
Alternative Title
Vertical distribution of total organic carbon and inorganic nutrient in photic zone of the northeast equatorial Pacific Ocean
Author(s)
손승규; 김경홍; 손주원; 지상범; 박정기; 김기현
KIOST Author(s)
Son, Seung Kyu(손승규)Kim, Kyeong Hong(김경홍)Chi, Sang Bum(지상범)
Publication Year
2003-05-15
Abstract
As a part of the KODES program, total organic carbon (TOC) and inorganic nutrients were determined in photic zone of 10 stations located from 131° to 135°W along 10.5°N in the northeast equatorial Pacific during June, 2002. Photic zone in the study area was extended down to 100 m depth and was divided into surface mixed layer (SML) and seasonal thermocline that was formed at between 40 and 60 m depth. The nutrient concentrations in top 40 m intervals were low, and increased with depth at all stations. SML was high in water temperature and showed the characteristics of oligotrophic water. Longitudinal variation was minor in the vertical profiles of nutrient concentrations. In the photic zone, integrated nitrogen, phosphorus, and silicon concentrations were 23.43 gN/m2, 3.88 gP/m2, and 33.31 gSi/m2 in average, respectively. The values of integrated nitrogen in the top 40 m interval varied in a narrow range from 0.03 to 0.06 gN/m2, while those in the thermocline increased exponentially to 2.69 gN/m2 up to 50 m depth. Phosphorus values ranged from 3.1 to 88.1 mgP/m2 in the top 40 m interval and then increased exponentially to 595.9 mgP/m2 up to 50 m depth. However, integrated silicon were different from case of nitrogen and phosphorus. Silicon values ranged from 0.3 to 16.3 gSi/m2 in the photic zone, and slowly increased with depth. TOC contents ranged from 0.48 to 1.47 mgC/L with an average of 0.93 mgC/L in the photic zone. TOC contents of SML were highest in the photic zone, and varied in a wide range reaching up to 0.87 mgC/L. At 50 to 60 m interval below thermocline, integrated TOC content decreased drastically. Integrated TOC content in the photic zone was 92.39 gC/m2. Consequently, the distributions of inorganic nutrients, especially nitrogen and phosphorus, and TOC in the study area are likely the result of close coupling between microbial activity and physical environment.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/32320
Bibliographic Citation
한국해양학회지 2003년 춘계학술발표회, pp.295, 2003
Publisher
한국해양학회
Type
Conference
Language
English
Publisher
한국해양학회
Related Researcher
Research Interests

deep sea mineral resources,deep sea sediments,심해저 광물자원,심해저 퇴적물,심해 환경

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