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Reconstruction of sea surface dimethylsulfide in the North Pacific during 1970s to 2000s
Title: | Reconstruction of sea surface dimethylsulfide in the North Pacific during 1970s to 2000s |
Authors: | Watanabe, Y.W. Browse this author →KAKEN DB | Yoshinari, H. Browse this author | Sakamoto, A. Browse this author | Nakano, Y. Browse this author | Kasamatsu, N. Browse this author | Midorikawa, T. Browse this author | Ono, T. Browse this author |
Keywords: | Dimethylsulfide | Algorithm | Decadal change | North Pacific |
Issue Date: | 16-Jan-2007 |
Publisher: | Elsevier |
Journal Title: | Marine Chemistry |
Volume: | 103 |
Issue: | 3-4 |
Start Page: | 347 |
End Page: | 358 |
Publisher DOI: | 10.1016/j.marchem.2006.10.004 |
Abstract: | We proposed an empirical equation of sea surface dimethylsulfide (DMS, nM) using sea surface temperature (SST, K), sea surface nitrate (SSN, μM) and latitude (L, °N) to reconstruct the sea surface flux of DMS over the North Pacific between 25°N and 55°N: ln DMS = 0.06346 · SST − 0.1210 · SSN − 14.11 · cos(L) − 6.278 (R2 = 0.63, p < 0.0001). Applying our algorithm to climatological hydrographic data in the North Pacific, we reconstructed the climatological distributions of DMS and its flux between 25 °N and 55 °N. DMS generally increased eastward and northward, and DMS in the northeastern region became to 2–5 times as large as that in the southwestern region. DMS in the later half of the year was 2–4 times as large as that in the first half of the year. Moreover, applying our algorithm to hydrographic time series datasets in the western North Pacific from 1971 to 2000, we found that DMS in the last three decades has shown linear increasing trends of 0.03 ± 0.01 nM year− 1 in the subpolar region, and 0.01 ± 0.001 nM year− 1 in the subtropical region, indicating that the annual flux of DMS from sea to air has increased by 1.9–4.8 μmol m− 2 year− 1. The linear increase was consistent with the annual rate of increase of 1% of the climatological averaged flux in the western North Pacific in the last three decades. |
Relation: | http://www.sciencedirect.com/science/journal/03044203 |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/20390 |
Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 渡辺 豊
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