Ocean acidification in the subtropical North Pacific estimated from accumulated carbonate data
Ocean acidification in the subtropical North Pacific estimated from accumulated carbonate data
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DOI：
10.2467/mripapers.62.47
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
T. Midorikawa;M. Ishii;D. Sasano;N. Kosugi;H. Sugimoto;Naotaka Hiraishi;S. Masuda;Toru Suzuki
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文献类型：
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作者：
T. Midorikawa;M. Ishii;D. Sasano;N. Kosugi;H. Sugimoto;Naotaka Hiraishi;S. Masuda;Toru Suzuki
最近海洋吸收人类活动产生的碳，使表层海洋碳循环发生变化，可能导致海洋酸化，从而对海洋生态系统产生严重影响。由于没有精确的pH值数据，我们使用过去40年的CO2分压合成数据评估了北太平洋亚热带大面积区域表层海洋酸化的趋势。结果表明，显着的酸化趋势（pH值下降0.01至0.02每十年）在亚热带北太平洋。pH值的下降率，排除海表温度的变化的贡献后，是最高的在东亚热带地区。特别是在这一区域，溶解无机碳浓度高的亚北极沃茨的侵入可能促成了相对较高的酸化率。对过去26年的pH值估计下降率与1969年之后的10年和未来50年的pH值估计下降率进行比较表明，根据未来人为CO2排放的情况，近年来以及未来的酸化将加速。
The recent uptake of anthropogenic carbon by the ocean brings about changes in the surface-ocean carbon cycle that could result in ocean acidification with subsequent serious effects on marine ecosystems. We evaluated the trend of ocean acidification in the surface layer of extensive regions of the subtropical North Pacific using synthesized data for partial pressure of CO2 for the past 40 years because no precise pH data were available. The results show significant trends of acidification (a pH decrease of 0.01 to 0.02 per decade) over the subtropical North Pacific. The rate of pH decrease, after excluding the contribution from changes in sea surface temperature, was highest in the eastern subtropical region. In this region in particular, the intrusion of subarctic waters with high concentrations of dissolved inorganic carbon could have contributed to the relatively high rate of acidification. Comparisons of the estimated rate of pH decrease for the past 26 years with those for the decade following 1969 and for 50 years into the future suggest an acceleration of acidification in recent years, as well as in the future, depending on the scenario of future anthropogenic CO2 emission.