Controls on near-bed oxygen concentration on the Northwest European Continental Shelf under a potential future climate scenario
Controls on near-bed oxygen concentration on the Northwest European Continental Shelf under a potential future climate scenario
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未来潜在气候情景下对西北欧洲大陆架近床氧浓度的控制
DOI：
10.1016/j.pocean.2020.102400
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发表时间：
2020
影响因子：
4.1
通讯作者：
Wakelin S
中科院分区：
文献类型：
--
作者：
Wakelin S
海洋中的溶解氧浓度在全球范围内正在下降。然而，气候变化对陆架海氧气的影响还没有得到很好的了解。我们调查了未来潜在的变化，氧气在西北欧大陆架下照常营业的温室气体排放情景（代表性浓度途径RCP8.5）。欧洲大陆架的地区从春季到秋季是热分层的，这可能导致密度跃层沃茨的氧气耗尽。利用一个瞬态气候强迫模式模拟研究了21世纪世纪温盐和近床溶解氧浓度的变化。在温暖和清新的水，氧浓度下降，在所有货架区。气候变化的信号首先出现在盐度，然后在温度，最后在近床氧。目前经历氧气耗尽的地区（北海东部，凯尔特海和阿莫里肯大陆架）在未来的情景中变得更大，氧气耗尽持续时间更长。在许多地区，由温度和盐度变化引起的溶解度变化是降低近床氧浓度的主要原因。直到2040年左右，溶解度的影响超过了生态系统的影响。但到2100年，在北海东部，生态系统变化的影响一般大于溶解度的影响。在阿莫里肯大陆架和凯尔特海，生态系统的变化部分缓解了溶解度变化引起的氧气下降。在21世纪世纪，欧洲大陆架的平均近床氧浓度预计将减少6.3%，其中73%是由于溶解度的变化，其余的生态系统的变化。对于月最小氧，下降为7.7%，其中溶解度分量占总量的50%。
Dissolved oxygen concentrations in the ocean are declining on a global scale. However, the impact of climate change on oxygen in shelf seas is not well understood. We investigate potential future changes in oxygen on the northwest European continental shelf under a business as usual greenhouse gas emissions scenario (Representative Concentration Pathway RCP8.5). Regions of the European shelf are thermally stratified from spring to autumn, which can cause oxygen depletion in sub-pycnocline waters. A transient climate-forced model simulation is used to study how the temperature, salinity and concentration of near bed dissolved oxygen change over the 21st century. In warming and freshening water, the oxygen concentration declines in all shelf regions. The climate change signal emerges first in salinity, then in temperature and finally in near bed oxygen. Regions that currently experience oxygen depletion (the eastern North Sea, Celtic Sea and Armorican shelf) become larger in the future scenario and oxygen depletion lasts longer. Solubility changes, caused by changes in temperature and salinity, are the dominant cause of reducing near bed oxygen concentrations in many regions. Until about 2040 the impact of solubility dominates over the effects of the evolving ecosystem. However, in the eastern North Sea by 2100, the effect of ecosystem change is generally larger than that of solubility. In the Armorican Shelf and Celtic Sea the ecosystem changes partially mitigate the oxygen decline caused by solubility changes. Over the 21st century the mean near bed oxygen concentration on the European shelf is projected to decrease by 6.3%, of which 73% is due to solubility changes and the remainder to changes in the ecosystem. For monthly minimum oxygen the decline is 7.7% with the solubility component being 50% of the total.
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影响因子：
2.8
作者：
Blackford, JC;Allen, JI;Gilbert, FJ
通讯作者：
Gilbert, FJ
爱尔兰海温度和盐度长期变化的预测和分析
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
E. Young;J. Holt
通讯作者：
J. Holt
21世纪西北欧陆架海气候预测的不确定性
影响因子：
4.1
作者：
J. Tinker;J. Lowe;A. Pardaens;J. Holt;R. Barciela
通讯作者：
R. Barciela
影响因子：
5.1
作者：
Jones, C. D.;Hughes, J. K.;Zerroukat, M.
通讯作者：
Zerroukat, M.
气候变化和海洋酸化对低营养层和有机碳向深海出口的影响
影响因子：
4.9
作者：
A. Yool;E. Popova;A. Coward;D. Bernie;T. R. Anderson
通讯作者：
T. R. Anderson