TERRAPUB Journal of Oceanography

Journal of Oceanography, Vol. 55 (No. 6), pp. 645-653, 1999

Overview of NOPACCS (Northwest Pacific Carbon Cycle Study)

Hiroyuki Tsubota1,2,3, Joji Ishizaka4,5, Akira Nishimura6 and Yutaka W. Watanabe4

1Hiroshima University
2Institute of Environmental Sciences, Shin-Nippon Meteorological and Oceanographical Consultant Co., Ltd., 1334-5 Riemon, Ooigawa-cho, Shida-gun, Shizuoka 421-0212, Japan
3Kansai Environmental Engineering Center, Co., Ltd., 1-3-5 Azuchi-cho, Chuou-ku, Osaka 541-0052, Japan
4National Institute for Resources and Environment, 16-3 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
5Faculty of Fisheries, Nagasaki University, 1-14 Bunkyo, Nagasaki, Nagasaki 852-8521, Japan
6Geological Survey of Japan, Tsukuba, Ibaraki 305-8567, Japan

(Received 13 August 1999; in revised form 30 September 1999; accepted 7 October 1999)

Abstract: The Northwest Pacific Carbon Cycle Study (NOPACCS) was a program aimed at investigating the carbon cycle of the North Pacific Ocean, which can be thought of as a large reservoir of carbon dioxide. NOPACCS was also aimed at estimating the North Pacific's capacity as a carbon sink. Project design, scientific results, and data availability, and subsequent projects resulting from this project are also described in this review. Studies of the upper ocean processes focused on the latitudinal differences in the fugacity of carbon dioxide; and on the detail of plankton community structures. Intermediate water was studied in relation to the formation of North Pacific Intermediate Water and the amount of accumulated anthropogenic carbon. The sedimentation process, past carbon cycle and coral reefs were also studied during the project. A preliminary, overall view of the carbon cycle of the North Pacific was drawn from the results of the project and compared to global values.

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