このアイテムのアクセス数: 155

このアイテムのファイル:
ファイル 記述 サイズフォーマット 
s10872-012-0150-8.pdf1.38 MBAdobe PDF見る/開く
タイトル: Stoichiometry among bioactive trace metals in the Chukchi and Beaufort Seas
著者: Cid, Abigail Parcasio
Nakatsuka, Seiji
Sohrin, Yoshiki  kyouindb  KAKEN_id
著者名の別形: 宗林, 由樹
キーワード: Arctic Ocean
Chukchi Sea
Beaufort Sea
Seawater
Bioactive trace metals
Total dissolvable species
Dissolved species
Labile particulate species
Speciation
Stoichiometry
発行日: Dec-2012
出版者: Springer Japan
誌名: Journal of Oceanography
巻: 68
号: 6
開始ページ: 985
終了ページ: 1001
抄録: he distribution of Al, Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb in seawater was investigated in the Chukchi and Beaufort Seas of the western Arctic Ocean in September 2000. The unfiltered and filtered seawater samples were used for determination of total dissolvable metal (TDM) and dissolved metal (DM), respectively. The concentration of labile particulate metal (LPM) was estimated with the difference between that of TDM and DM. The concentrations of TDAl, TDMn, TDFe, TDCo and TDPb varied substantially in the study area. The high concentrations occurred at stations near the Bering Strait, in the Mackenzie delta, and above reductive sediments on the shelf and slope. These elements were mostly dominated by labile particulate species, such as Fe–Mn oxides and species adsorbed on terrestrial clay. DCo was correlated with DMn over the study area (r = 0.78, n = 135), and the slope of the regression line was 27 times higher at a pelagic station than at a shelf station. TDNi, TDCu, TDZn and TDCd showed relatively small variations and were generally dominated by dissolved species. There was a moderate correlation between DCd and phosphate for all samples (r = 0.79), whereas there were no significant correlation between the other DMs and nutrients. TDNi and TDCu showed a remarkable linearity for most stations except those near the Bering Strait (R[2] = 0.95, n = 126). These results suggest that biogeochemical cycling including uptake by phytoplankton and remineralization from settling particles has only minor control over the distribution of trace metals in this area. Using the present data, the annual input of bioactive trace metals form the Bering Strait and the Mackenzie River was estimated. Also, the trace metal compositions of major water masses were evaluated. The dissolved elemental ratio was P:Al:Mn:Fe:Co:Ni:Cu:Zn:Cd = 1:1.2 × 10[−2]:4.4 × 10[−4]:1.4 × 10[−3]:3.7 × 10[−5]:3.7 × 10[−3]:1.4 × 10[−3]:4.5 × 10[−3]:2.2 × 10[−4] for Canada Basin deep water (CBDW). This ratio was significantly different from that for Pacific deep water and Bering Sea water, suggesting substantial modification of the trace metal compositions of seawater in the study area.
著作権等: The final publication is available at www.springerlink.com
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/166328
DOI(出版社版): 10.1007/s10872-012-0150-8
出現コレクション:学術雑誌掲載論文等

アイテムの詳細レコードを表示する

Export to RefWorks


出力フォーマット 


このリポジトリに保管されているアイテムはすべて著作権により保護されています。