caa a22 4500 605455295 CHVBK 20210128100211.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10872-015-0313-5 doi (NATIONALLICENCE)springer-10.1007/s10872-015-0313-5 Effect of seasonal change in gas transfer coefficient on air-sea CO2 flux in the western North Pacific [Elektronische Daten] [Xuanrui Xiong, Yoshio Masuda, Taketo Hashioka, Tsuneo Ono, Yasuhiro Yamanaka] We used an eddy-permitting three-dimensional ocean ecosystem model and applied it in the western North Pacific to understand the seasonal variations and horizontal distributions of the air-sea CO2 flux and difference in the partial pressure between sea water and the atmosphere (∆pCO2). The high-resolution model reproduced the observed zonal belt of strong CO2 uptake in the mid-latitude (30-45°N) western North Pacific including the Kuroshio extension and mixed water regions, which was difficult to show in previous coarse-resolution models. The East Asian winter monsoon, an important phenomenon in the western North Pacific, affects the seasonal CO2 air-sea gas exchange with a high (low) gas transfer coefficient in winter (summer). In the subtropical region, ∆pCO2 is negative in winter and positive in summer as a result of the temperature effect. Combination of seasonal change in gas transfer coefficient with ∆pCO2 suppresses CO2 release in the subtropical region, and vice versa in the subarctic region (i.e., suppresses CO2 uptake). That is, the East Asian winter monsoon in the western North Pacific contributes to the reduction of the annual CO2 flux through the seasonal change in the gas transfer coefficient, leading to an overall annual CO2 uptake in the subtropical region and CO2 release in the subarctic region. The Oceanographic Society of Japan and Springer Japan, 2015 Gas transfer coefficient nationallicence p CO2 nationallicence Air-sea CO2 flux nationallicence Ecosystem model nationallicence North Pacific nationallicence East Asian winter monsoon nationallicence Seasonal change nationallicence Xiong Xuanrui Graduate School of Environmental Earth Science, Hokkaido University, N10W5, Kita-ku, 060-0810, Sapporo, Hokkaido, Japan aut Masuda Yoshio Graduate School of Environmental Earth Science, Hokkaido University, N10W5, Kita-ku, 060-0810, Sapporo, Hokkaido, Japan aut Hashioka Taketo Environmental Biogeochemical Cycle Research Program, Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, 236-0001, Yokohama, Japan aut Ono Tsuneo National Research Institute of Fisheries Science, 2-12-4 Fukuura, Kanazawa, 236-8648, Yokohama, Kanagawa, Japan aut Yamanaka Yasuhiro Graduate School of Environmental Earth Science, Hokkaido University, N10W5, Kita-ku, 060-0810, Sapporo, Hokkaido, Japan aut Journal of Oceanography Springer Japan 71/6(2015-12-01), 685-701 0916-8370 71:6<685 2015 71 10872 https://doi.org/10.1007/s10872-015-0313-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10872-015-0313-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Xiong Xuanrui Graduate School of Environmental Earth Science, Hokkaido University, N10W5, Kita-ku, 060-0810, Sapporo, Hokkaido, Japan aut NATIONALLICENCE 700 1- Masuda Yoshio Graduate School of Environmental Earth Science, Hokkaido University, N10W5, Kita-ku, 060-0810, Sapporo, Hokkaido, Japan aut NATIONALLICENCE 700 1- Hashioka Taketo Environmental Biogeochemical Cycle Research Program, Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, 236-0001, Yokohama, Japan aut NATIONALLICENCE 700 1- Ono Tsuneo National Research Institute of Fisheries Science, 2-12-4 Fukuura, Kanazawa, 236-8648, Yokohama, Kanagawa, Japan aut NATIONALLICENCE 700 1- Yamanaka Yasuhiro Graduate School of Environmental Earth Science, Hokkaido University, N10W5, Kita-ku, 060-0810, Sapporo, Hokkaido, Japan aut NATIONALLICENCE 773 0- Journal of Oceanography Springer Japan 71/6(2015-12-01), 685-701 0916-8370 71:6<685 2015 71 10872