The Sensitivity of Future Ocean Oxygen to Changes in Ocean Circulation
The Sensitivity of Future Ocean Oxygen to Changes in Ocean Circulation
复制标题
未来海洋氧气对海洋环流变化的敏感性
DOI:
10.1002/2017gb005777
复制
发表时间:
2018
影响因子:
5.2
通讯作者:
Trossman, David S.
中科院分区:
文献类型:
--
作者:
Palter, Jaime B.;Trossman, David S.
A decline in global ocean oxygen concentrations has been observed over the twentieth century and is predicted to continue under future climate change. We use a unique modeling framework to understand how the perturbed ocean circulation may influence the rate of ocean deoxygenation in response to a doubling of atmospheric CO2and associated global warming. These simulations suggest that much of the oxygen decline under warming is due to changes in ocean mixing and O2solubility. However, in our model, the large‐scale ocean circulation response to CO2doubling slows the pace of future oxygen loss by 20%. Oxygen concentration changes are most sensitive to circulation perturbations in the Southern Ocean. A small stabilizing effect on oxygen arises from the reduction of export productivity and associated respiration in the ocean interior. A slowdown of the Atlantic Meridional Overturning Circulation increases the residence time of the deep Atlantic Ocean but does not cause a major oxygen decline at the time of CO2doubling, because respiration is slow at these depths. The simulations show that the decrease in O2solubility associated with ocean warming is greater than the realized decrease in preformed O2, particularly at high latitudes, where circulation changes reduce the proportion of undersaturated waters sinking into the ocean interior. Finally, in the tropical Pacific oxygen minimum zone, a predicted weakening of the Walker Circulation slows the regional upwelling of nutrients and the associated export productivity and respiration, preventing the intensification of hypoxia there.
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影响因子:
2.5
作者:
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通讯作者:
I. Marinov
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
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影响因子:
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通讯作者:
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通讯作者:
Marvasti, Seyedehsafoura Sedigh
影响因子:
56.9
作者:
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通讯作者:
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