Sensitivity of ocean oxygenation to variations in tropical zonal wind stress magnitude
Sensitivity of ocean oxygenation to variations in tropical zonal wind stress magnitude
复制标题
海洋氧合对热带纬向风应力强度变化的敏感性
DOI：
10.1002/2013gb004708
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发表时间：
2014
影响因子：
5.2
通讯作者：
M. England
中科院分区：
文献类型：
--
作者：
N. Ridder;M. England
据观察，海洋氧化作用在过去几十年中发生了变化，由于若干机制的相互作用，预计在全球气候变化下将进一步变化。在这项研究中，我们隔离修改后的热带表面风应力条件下的数值气候模式中的海洋氧合的演变的影响。我们发现海洋氧合与低纬度表面风应力成反比。这种反应大约有三分之一是由海洋表面温度异常引起的;其余三分之二是由海洋环流和海洋生物的变化引起的。全球平均O2浓度变化在两个最极端的扰动情况下分别达到+4 μM和-3.6 μM的最大值，风变化分别为-30%和+30%。局部变化在风速减少30%时的+92 μM和风速增加30%时的-56 μM之间。总的来说，我们发现全球低氧量的程度与风扰动的符号相同;即，较弱的风会减少全球范围内的低氧量，反之亦然。我们确定了两个区域，一个在智利附近的太平洋，另一个在索马里附近的印度洋，这对全球海洋中氧气最低区的演变特别重要。
Ocean oxygenation has been observed to have changed over the past few decades and is projected to change further under global climate change due to an interplay of several mechanisms. In this study we isolate the effect of modified tropical surface wind stress conditions on the evolution of ocean oxygenation in a numerical climate model. We find that ocean oxygenation varies inversely with low‐latitude surface wind stress. Approximately one third of this response is driven by sea surface temperature anomalies; the remaining two thirds result from changes in ocean circulation and marine biology. Global mean O2 concentration changes reach maximum values of +4 μM and −3.6 μM in the two most extreme perturbation cases of −30% and +30% wind change, respectively. Localized changes lie between +92 μM under 30% reduced winds and −56 μM for 30% increased winds. Overall, we find that the extent of the global low‐oxygen volume varies with the same sign as the wind perturbation; namely, weaker winds reduce the low‐oxygen volume on the global scale and vice versa for increased trade winds. We identify two regions, one in the Pacific Ocean off Chile and the other in the Indian Ocean off Somalia, that are of particular importance for the evolution of oxygen minimum zones in the global ocean.
影响因子：
5.2
作者：
Duteil, O.;Oschlies, A.
通讯作者：
Oschlies, A.
影响因子：
56.9
作者：
Stramma, Lothar;Johnson, Gregory C.;Mohrholz, Volker
通讯作者：
Mohrholz, Volker