Modulation of the North Atlantic deoxygenation by the slowdown of the nutrient stream
Modulation of the North Atlantic deoxygenation by the slowdown of the nutrient stream
复制标题
通过减缓营养流来调节北大西洋的脱氧
DOI：
10.5194/bg-17-231-2020
复制
发表时间：
2019
期刊：
影响因子：
4.9
通讯作者：
A. Bracco
中科院分区：
文献类型：
--
作者：
F. Tagklis;Takamitsu Ito;A. Bracco
抽象的。西部边界流起到输送通道的作用
从低纬度到高纬度的营养丰富的水域(营养流)和
负责维持北方中纬度和高纬度的生产力
大西洋和北太平洋。这项研究调查了百年氧
(O2)和背景下北半球的营养变化
预测的大西洋经向变暖和普遍减弱
地球系统模型子集中的翻转环流(AMOC)
在CMIP5目录中。在检查的所有模型中，大西洋变暖的速度更快
比太平洋，导致了更大的盆地规模的溶解度
减少。然而，这种热力学趋势被以下变化所补偿
占主导地位的生物驱动的氧气消耗
氧气预算。这些变化与营养物质的减速有关
该盆地中的河流，响应于AMOC的减弱。北大西洋
抵抗由于生物衰弱而导致的升温引起的脱氧
碳输出和再矿化，导致更高的O2水平。相反，预计的营养流和常量营养素库存在
北太平洋几乎保持不变。
Abstract. Western boundary currents act as transport pathways for
nutrient-rich waters from low to high latitudes (nutrient streams) and are
responsible for maintaining midlatitude and high-latitude productivity in the North
Atlantic and North Pacific. This study investigates the centennial oxygen
(O2) and nutrient changes over the Northern Hemisphere in the context
of the projected warming and general weakening of the Atlantic Meridional
Overturning Circulation (AMOC) in a subset of Earth system models included
in the CMIP5 catalogue. In all models examined, the Atlantic warms faster
than the Pacific Ocean, resulting in a greater basin-scale solubility
decrease. However, this thermodynamic tendency is compensated by changes in
the biologically driven O2 consumption which dominates the overall
O2 budget. These changes are linked to the slowdown of the nutrient
stream in this basin, in response to the AMOC weakening. The North Atlantic
resists the warming-induced deoxygenation due to the weakened biological
carbon export and remineralization, leading to higher O2 levels. Conversely, the projected nutrient stream and macronutrient inventory in the
North Pacific remain nearly unchanged.
影响因子：
56.9
作者：
Stramma, Lothar;Johnson, Gregory C.;Mohrholz, Volker
通讯作者：
Mohrholz, Volker
影响因子：
64.8
作者：
Schmidtko, Sunke;Stramma, Lothar;Visbeck, Martin
通讯作者：
Visbeck, Martin