Rapid increase of observed DIC and pCO(2) in the surface waters of the North Sea in the 2001-2011 decade ascribed to climate change superimposed by biological processes

Clargo Nicola M.; Salt Lesley A.; Thomas Helmuth; de Saar Hein J. W.

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Rapid increase of observed DIC and pCO(2) in the surface waters of the North Sea in the 2001-2011 decade ascribed to climate change superimposed by biological processes

机译：由于生物过程叠加的气候变化，在2001-2011十年间，北海地表水中观测到的DIC和pCO（2）迅速增加

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The CO2 system in the North Sea over the 2001-2011 decade was investigated using four comprehensive basin-wide datasets covering the late summer periods of 2001, 2005, 2008 and 2011. We find that rises in surface water DIC and pCO(2) exceeded concurrent rises in atmospheric pCO(2), which we attribute primarily to biological activity in late summer. After accounting for this biological signal, the observed ocean acidification occurs at a rate that is consistent with concurrent atmospheric and open ocean CO2 increases over the 2001-2011 decade. Nevertheless, we do find a consistent reduction in CO2 undersaturation in the NNS and an increase in CO2 supersaturation in the SNS. We propose that the synergistic effects of increasing atmospheric pCO(2) and subsequent decrease in seawater buffering capacity, together with rising sea surface temperatures in the future oceans, may reduce the strength of the North Sea as a CO2 sink. Such a reduction would diminish the efficiency of this region as a continental shelf pump with respect to uptake of CO2 by the sea. Ultimately this would constitute a positive feedback mechanism, i.e. enhancing the airborne fraction of anthropogenic CO2 and thus the net rate of increase of atmospheric pCO(2) and subsequent global climate change. (C) 2015 Elsevier B.V. All rights reserved.

机译：我们使用四个全面的全流域数据集（涵盖2001年，2005年，2008年和2011年夏末）调查了2001-2011年十年期间北海的CO2系统。我们发现地表水DIC和pCO（2）的上升超过了大气中pCO（2）的同时上升，这主要归因于夏末的生物活动。考虑到这种生物信号后，观测到的海洋酸化发生的速率与2001-2011十年期间大气和露天海洋二氧化碳的同时增加是一致的。但是，我们确实发现NNS中的CO2饱和度持续降低，而SNS中的CO2饱和度升高。我们建议，增加大气中pCO（2）的协同效应以及随后海水缓冲能力的降低，以及未来海洋中海面温度的升高，可能会降低北海作为CO2汇的强度。这样的减少将降低该地区作为大陆架泵对海洋吸收CO2的效率。最终，这将构成一种积极的反馈机制，即提高人为二氧化碳的空气传播比例，从而提高大气中pCO（2）的净增加率以及随后的全球气候变化。（C）2015 Elsevier B.V.保留所有权利。

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来源
《Marine Chemistry》 |2015年第3期|566-581|共16页
作者
Clargo Nicola M.; Salt Lesley A.; Thomas Helmuth; de Saar Hein J. W.;
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作者单位

Royal Netherlands Inst Sea Res, NL-1797 SZ Texel, Netherlands;

CNRS, UMR 7144, Equipe Chim Marine, Stn Biol Roscoff, F-29680 Roscoff, France;

Dalhousie Univ, Dept Oceanog, Halifax, NS B3H 4R2, Canada;

Royal Netherlands Inst Sea Res, NL-1797 SZ Texel, Netherlands;

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正文语种 eng
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Carbon dioxide (CO2); Shelf Seas; Dissolved Inorganic Carbon; Air-sea CO2 exchange; North Sea; Mechanisms of Ocean Acidification;

机译：二氧化碳;陆架海洋;溶解性无机碳;海气交换;北海;海洋酸化机制;

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Rapid increase of observed DIC and pCO(2) in the surface waters of the North Sea in the 2001-2011 decade ascribed to climate change superimposed by biological processes

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