Space and time variability of the Southern Ocean carbon budget
Space and time variability of the Southern Ocean carbon budget
复制标题
南大洋碳预算的时空变化
DOI：
10.1002/2016jc012646
复制
发表时间：
2017
影响因子：
--
通讯作者：
L. Talley
中科院分区：
文献类型：
--
作者：
I. Rosso;M. Mazloff;Ariane Verdy;L. Talley
上层海洋溶解无机碳（DIC）浓度受平流和扩散输送散度、生物过程、淡水和海气CO2通量的调节。这些机制在南大洋的相对重要性尚不确定，因为在这一地区的全年观测有限。我们使用一种新的物理-地球化学状态估计的南大洋构建一个封闭的DIC预算的顶部650米，并调查的空间和时间的变化的碳系统的不同组成部分。
上层海洋DIC的变化的主导机制取决于所考虑的位置和时间和空间尺度。平流输送是最有影响力的机制，并在10天至5年的时间尺度分析，管理当地DIC预算。扩散效应几乎可以忽略不计。大规模的输送结构主要是由上升流和下降流，虽然横向非地转和地转输送是显着的。在南极绕极流中，碳收支分量也受到地形和生物热点的影响。在亚热带，蒸发和海气CO2通量主要平衡由于生物生产和平流输送的汇。最后，在副极地地区的海冰过程，改变海水体积，从而DIC浓度，补偿平流输送的巨大影响，并调制生物活动和海气CO2通量的时间。
The upper ocean dissolved inorganic carbon (DIC) concentration is regulated by advective and diffusive transport divergence, biological processes, freshwater and air-sea CO2 fluxes. The relative importance of these mechanisms in the Southern Ocean is uncertain, as year-round observations in this area have been limited. We use a novel physical-biogeochemical state estimate of the Southern Ocean to construct a closed DIC budget of the top 650 m and investigate the spatial and temporal variability of the different components of the carbon system.
The dominant mechanisms of variability in upper ocean DIC depend on location and time and space scales considered. Advective transport is the most influential mechanism and governs the local DIC budget across the 10 day to 5-year timescales analyzed. Diffusive effects are nearly negligible. The large-scale transport structure is primarily set by up- and downwelling, though both the lateral ageostrophic and geostrophic transports are significant. In the Antarctic Circumpolar Current, the carbon budget components are also influenced by the presence of topography and biological hot spots. In the subtropics, evaporation and air-sea CO2 flux primarily balances the sink due to biological production and advective transport. Finally, in the subpolar region sea ice processes, which change the seawater volume and thus the DIC concentration, compensate the large impact of the advective transport and modulate the timing of biological activity and air-sea CO2 flux.
南大洋冰盖融化和冰山崩解产生的淡水通量
影响因子：
3.2
作者：
Hammond M
通讯作者：
Hammond M
影响因子：
3.2
作者：
Losch, Martin;Menemenlis, Dimitris;Hill, Chris
通讯作者：
Hill, Chris