Iron supply to the western subarctic Pacific : Importance of iron export from the Sea of Okhotsk

Nishioka, Jun; Ono, Tsuneo; Saito, Hiroaki; Nakatsuka, Takeshi; Takeda, Shigenobu; Yoshimura, Takeshi; Suzuki, Koji; Kuma, Kenshi; Nakabayashi, Shigeto; Tsumune, Daisuke; Mitsudera, Humio; Johnson, W. Keith; Tsuda, Atsushi

Iron supply to the western subarctic Pacific : Importance of iron export from the Sea of Okhotsk

Nishioka, Jun; Ono, Tsuneo; Saito, Hiroaki et al.

Journal of Geophysical Research, 2007, 112, C10012

Permalink : https://hdl.handle.net/2115/30285

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アクセス権	open access
URI	https://hdl.handle.net/2115/30285
タイトル	Iron supply to the western subarctic Pacific : Importance of iron export from the Sea of Okhotsk
著者	Nishioka, Jun ; Ono, Tsuneo ; Saito, Hiroaki ; Nakatsuka, Takeshi ; Takeda, Shigenobu ; Yoshimura, Takeshi ; Suzuki, Koji ; Kuma, Kenshi ; Nakabayashi, Shigeto ; Tsumune, Daisuke ; Mitsudera, Humio ; Johnson, W. Keith ; Tsuda, Atsushi
著者名 Nishioka, Jun
著者名 Ono, Tsuneo
著者名 Saito, Hiroaki
著者名 Nakatsuka, Takeshi
著者名 Takeda, Shigenobu
著者名 Yoshimura, Takeshi
著者名 Suzuki, Koji
e-Rad_Researcher 30205158 著者名 Kuma, Kenshi
著者名 Nakabayashi, Shigeto
著者名 Tsumune, Daisuke
e-Rad_Researcher 20360943 著者名 Mitsudera, Humio
著者名 Johnson, W. Keith
著者名 Tsuda, Atsushi
言語	英語
キーワード	iron
	lateral transport
	biogeochemical cycle
発行日	2007-10-11
出版者	American Geophysical Union
収録物名	Journal of Geophysical Research
巻(号)	112
ページ	C10012
抄録	Iron is an essential nutrient and plays an important role in the control of phytoplankton growth (Martin et al., 1989). Atmospheric dust has been thought to be the most important source of iron, supporting annual biological production in the western subarctic Pacific (WSP) (Duce and Tindale, 1991; Moore et al., 2002). We argue here for another source of iron to the WSP. We found extremely high concentrations of dissolved and particulate iron in the Okhotsk Sea Intermediate Water (OSIW) and the North Pacific Intermediate Water (NPIW), and water ventilation processes in this region probably control the transport of iron through the intermediate water layer from the continental shelf of the Sea of Okhotsk to wide areas of the WSP. Additionally, our time series data in the Oyashio region of the WSP indicate that the pattern of seasonal changes in dissolved iron concentrations in the surface-mixed layer was similar to that of macronutrients, and that deep vertical water mixing resulted in higher winter concentrations of iron in the surface water of this region. The estimated dissolved iron supply from the iron-rich intermediate waters to the surface waters in the Oyashio region was comparable to or higher than the reported atmospheric dust iron input and thus a major source of iron to these regions. Our data suggest that the consideration of this source of iron is essential in our understanding of spring biological production and biogeochemical cycles in the western subarctic Pacific and the role of the marginal sea.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	An edited version of this paper was published by AGU. Copyright 2007 American Geophysical Union. Nishioka, Jun; Ono, Tsuneo; Saito, Hiroaki; Nakatsuka, Takeshi; Takeda, Shigenobu; Yoshimura, Takeshi; Suzuki, Koji; Kuma, Kenshi; Nakabayashi, Shigeto; Tsumune, Daisuke; Mitsudera, Humio, (2007), Iron supply to the western subarctic Pacific : Importance of iron export from the Sea of Okhotsk, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 112, C10012, 10.1029/2006JC004055. To view the published open abstract, go to http://dx.doi.org/10.1029/2006JC004055
PISSN	0148-0227
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1029/2006JC004055