Influence of Phytoplankton Advection on the Productivity Along the Atlantic Water Inflow to the Arctic Ocean
Influence of Phytoplankton Advection on the Productivity Along the Atlantic Water Inflow to the Arctic Ocean
复制标题
浮游植物平流对大西洋流入北冰洋沿岸生产力的影响
DOI：
10.3389/fmars.2019.00583
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发表时间：
2019
影响因子：
3.7
通讯作者：
P. Matrai
中科院分区：
文献类型：
--
作者：
M. Vernet;I. Ellingsen;Lena Seuthe;D. Slagstad;M. Cape;P. Matrai
向北流动的大西洋水域以浮游动物的形式将热量、营养物质和有机碳输送到格陵兰海东部和弗拉姆海峡。关于浮游植物平流在这股从北大西洋到北冰洋的大西洋水流入(AWI)中的作用，人们知之甚少。利用物理-生物耦合SINMOD模式估算了挪威北部海岸(沿挪威大西洋流NAC)、西斯匹茨卑尔根流(WSC)和弗拉姆海峡北部北冰洋入海口的原地和平流初级生产力。模拟结果表明，AWI沿岸任何一个位置浮游植物生物量的变化主要受平流的支持。这种平流是原地光合作用生物量的5-50倍，随季节变化，在原地初级生产力最大的6月份贡献最小。NAC的平流将浮游植物的生物量从南方的高产量地区输送过来，有助于维持更靠北的浮游植物生产力。斯瓦尔巴群岛北部北冰洋入口处的就地生产率进一步下降。在生长季节(4月至9月)，北部自来水公司过剩的原地年产量被出口到北冰洋。原地初级生产力和平流初级生产力之间的平衡确定了AWI沿线的三个主要区域，推测受到桡足类放牧的空间和时间变化的影响。随着海冰每年范围的缩小和更温暖的海水进入北冰洋，带有AWI标志的无冰WSC的生态特征可能会延伸到斯瓦尔巴特群岛以北和以东，进入北极中部。因此，平流是连接北冰洋和大西洋海洋生态系统的重要纽带，主要是在入海口。
Northwards flowing Atlantic waters transport heat, nutrients, and organic carbon in the form of zooplankton into the eastern Greenland Sea and Fram Strait. Less is known of the contribution of phytoplankton advection in this current, the Atlantic Water Inflow (AWI) spanning from the North Atlantic to the Arctic Ocean. The in situ and advected primary production was estimated by using the physical-biological coupled SINMOD model, from northern Norway coast (along the Norwegian Atlantic Current, NAC), the West Spitsbergen Current (WSC) and the entrance to the Arctic Ocean in northern Fram Strait. The simulation results show that changes in phytoplankton biomass at any one location along the AWI are supported primarily by advection. This advection is 5-50 times higher than the biomass photosynthesized in situ, seasonally variable, with minimum contribution in June, at the time of maximum in situ primary production. Advection in the NAC transports phytoplankton biomass from areas of higher production in the south, contributing to the maintenance of phytoplankton productivity further north. In situ productivity further decreases north of Svalbard Archipelago, at the entrance to the Arctic Ocean. Excess in situ annual production in northern WSC is exported to the Arctic Ocean during the growth season (April to September). The balance between in situ and advected primary production defines three main regions along the AWI, presumably modulated by the spatial and temporal variability of copepod grazing. As the sea ice reduces its annual extent and warmer waters enter the Arctic Ocean, ecological characteristics of the ice-free WSC with its AWI signature could extend north and east of Svalbard and into the central Arctic. Advection thus constitutes an important link connecting marine ecosystems of the Arctic and Atlantic Ocean, mainly at the gateways.
影响因子：
6.7
作者：
Hofmann, M.;Worm, B.;Schellnhuber, H. J.
通讯作者：
Schellnhuber, H. J.
影响因子：
--
作者：
Torres-Valdés S
通讯作者：
Torres-Valdés S