Aluminium in the North Atlantic Ocean and the Labrador Sea (GEOTRACES GA01 section): roles of continental inputs and biogenic particle removal
Aluminium in the North Atlantic Ocean and the Labrador Sea (GEOTRACES GA01 section): roles of continental inputs and biogenic particle removal
复制标题
北大西洋和拉布拉多海中的铝（GEOTRACES GA01 部分）：大陆输入和生物颗粒去除的作用
作者：
Jan‐Lukas Menzel Barraqueta;C. Schlosser;H. Planquette;Arthur Gourain;M. Cheize;Julia Boutorh;R. Shelley;L. Contreira Pereira;M. Gledhill;M. Hopwood;F. Lacan;P. Lherminier;G. Sarthou;E. Achterberg
抽象的。溶解铝（dAl）在水中的分布
沿沿着GEOTRACES对北大西洋和拉布拉多海的纵列进行了研究
第GA01节，以解开这个元素的来源和汇。地表水
由于低气溶胶沉积，dAl浓度较低（中位数为2.5 nM
以及被生物颗粒（即浮游植物细胞）去除。然而，在这方面，
伊比利亚和格陵兰的地表水dAl浓度增加
大陆架（高达30.9 nM）由于大陆输入（河流，冰川粉，
冰融化）。地表沃茨中溶解铝与
叶绿素a和生物硅（蛋白石）浓度。的丰度
硅藻对表面颗粒物有显著的控制作用（p<0.01）
通过降低dAl水平和增加pAl水平来确定Al（pAl）与dAl的比率。
溶解铝浓度一般随深度增加，
在伊比利亚盆地以西，强酸性（R2>0.76），
这表明在下沉的再矿化过程中，dAl在深度处的净释放
含有蛋白石的颗粒。dAl在近底深度的富集是
由于沉积物的再悬浮而观察到。最高dAl浓度
(up至38.7 nM），在地中海流出沃茨中观察到，
北大西洋东部中层沃茨的主要dAl来源。这
研究清楚地表明，dAl的垂直和横向分布在
北大西洋与大西洋其他地区相比有所不同，
全球海洋。造成这些巨大的流域间和流域内差异的原因
大气中主要铝源的空间变化较大
沉积，和主要的铝汇，颗粒清除生物颗粒。
Abstract. The distribution of dissolved aluminium (dAl) in the water
column of the North Atlantic and Labrador Sea was studied along GEOTRACES
section GA01 to unravel the sources and sinks of this element. Surface water
dAl concentrations were low (median of 2.5 nM) due to low aerosol deposition
and removal by biogenic particles (i.e. phytoplankton cells). However,
surface water dAl concentrations were enhanced on the Iberian and Greenland
shelves (up to 30.9 nM) due to continental inputs (rivers, glacial flour,
and ice melt). Dissolved Al in surface waters scaled negatively with
chlorophyll a and biogenic silica (opal) concentrations. The abundance of
diatoms exerted a significant (p<0.01) control on the surface particulate
Al (pAl) to dAl ratios by decreasing dAl levels and increasing pAl levels.
Dissolved Al concentrations generally increased with depth and correlated
strongly with silicic acid (R2>0.76) west of the Iberian Basin,
suggesting net release of dAl at depth during remineralization of sinking
opal-containing particles. Enrichment of dAl at near-bottom depths was
observed due to the resuspension of sediments. The highest dAl concentrations
(up to 38.7 nM) were observed in Mediterranean Outflow Waters, which act as
a major source of dAl to mid-depth waters of the eastern North Atlantic. This
study clearly shows that the vertical and lateral distributions of dAl in the
North Atlantic differ when compared to other regions of the Atlantic and
global oceans. Responsible for these large inter- and intra-basin differences
are the large spatial variabilities in the main Al source, atmospheric
deposition, and the main Al sink, particle scavenging by biogenic particles.
南乔治亚州南大洋陆架水域和浮游植物繁殖的溶解和不稳定颗粒铁供应机制
影响因子：
4.9
作者：
Schlosser C
通讯作者：
Schlosser C
影响因子：
5.2
作者：
S. Ussher;E. Achterberg;Claire F. Powell;A. Baker;T. Jickells;R. Torres;P. Worsfold
通讯作者：
S. Ussher;E. Achterberg;Claire F. Powell;A. Baker;T. Jickells;R. Torres;P. Worsfold