Dissolved manganese in the Atlantic sector of the Southern Ocean

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	Dissolved manganese in the Atlantic sector of the Southern Ocean
	Middag, R. ; de Baar, H. J. W. ; Laan, P. ; Cai, P. H. ; van Ooijen, J. C. ; Cai PH(蔡平河)
刊名	http://dx.doi.org/10.1016/j.dsr2.2010.10.043
	2011-12-15
关键词	CONTINENTAL-MARGIN SEDIMENTS TRACE-METALS SURFACE WATERS HYDROTHERMAL MANGANESE IRON LIMITATION PACIFIC-OCEAN SARGASSO SEA INDIAN-OCEAN WEDDELL SEA BLACK-SEA
英文摘要	NWO [851.40.101]; The first comprehensive dataset (492 samples) of dissolved Mn in the Southern Ocean shows extremely low values of 0.04 up to 0.64 nM in the surface waters and a subsurface maximum with an average concentration of 0.31 nM (n=20; S.D.=0.08 nM). The low Mn in surface waters correlates well with the nutrients PO4 and NO3 and moderately well with Si(OH)(4) and fluorescence. Furthermore, elevated concentrations of Mn in the surface layer coincide with elevated Fe and light transmission and decreased export (Th-234/U-238 deficiency) and fluorescence. It appears that Mn is a factor of importance in partly explaining the HNLC conditions in the Southern Ocean, in conjunction with significant controls by the combination of Fe limitation and light limitation. No input of Mn from the continental margins was observed. This is ascribed to the protruding continental ice sheet that covers the shelf and shuts down the usual biological production, microbial breakdown and sedimentary geochemical cycling. The low concentrations of Mn in the deep ocean basins (0.07-0.23 nM) were quite uniform, but some elevations were observed. The highest deep concentrations of Mn were observed at the Bouvet Triple Junction region and coincided with high concentrations of Fe and are deemed to be from hydrothermal input. The deep basins on both sides of the ridge were affected by this input. In the deep Weddell Basin the input of Weddell Sea Bottom Water appears to be the source of the slightly elevated concentrations of Mn in this water layer. (C) 2010 Elsevier Ltd. All rights reserved.
语种	英语
出版者	DEEP-SEA RES PT II
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87792]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Middag, R.,de Baar, H. J. W.,Laan, P.,et al. Dissolved manganese in the Atlantic sector of the Southern Ocean[J]. http://dx.doi.org/10.1016/j.dsr2.2010.10.043,2011.
APA	Middag, R.,de Baar, H. J. W.,Laan, P.,Cai, P. H.,van Ooijen, J. C.,&蔡平河.(2011).Dissolved manganese in the Atlantic sector of the Southern Ocean.http://dx.doi.org/10.1016/j.dsr2.2010.10.043.
MLA	Middag, R.,et al."Dissolved manganese in the Atlantic sector of the Southern Ocean".http://dx.doi.org/10.1016/j.dsr2.2010.10.043 (2011).