Impact of anthropogenic CO2 on the CaCO3 system in the oceans
Impact of anthropogenic CO2 on the CaCO3 system in the oceans
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DOI：
10.1126/science.1097329
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发表时间：
2004-07-16
期刊：
影响因子：
56.9
通讯作者：
Millero, FJ
中科院分区：
文献类型：
--
作者：
Feely, RA;Sabine, CL;Millero, FJ
在过去两个世纪里，大气中二氧化碳浓度的上升导致海洋吸收更多的二氧化碳。这一酸化过程改变了海洋中碳酸钙颗粒的饱和状态。在这里，我们估计在原位碳酸钙溶解速率为全球海洋总碱度和氯氟烃数据，我们还讨论了未来的影响，人为CO2对碳酸钙壳形成物种。碳酸钙溶解速率，范围从0.003至1.2微摩尔每公斤每年，观察开始附近的文石饱和地平线。全球海洋的总水柱CaCO 3溶解速率约为每年0.5 +/- 0.2 petagram的CaCO 3-C，约为CaCO 3出口产量的45%至65%。
Rising atmospheric carbon dioxide (CO2) concentrations over the past two centuries have led to greater CO2 uptake by the oceans. This acidification process has changed the saturation state of the oceans with respect to calcium carbonate (CaCO3) particles. Here we estimate the in situ CaCO3 dissolution rates for the global oceans from total alkalinity and chlorofluorocarbon data, and we also discuss the future impacts of anthropogenic CO2 on CaCO3 shell forming species. CaCO3 dissolution rates, ranging from 0.003 to 1.2 micromoles per kilogram per year, are observed beginning near the aragonite saturation horizon. The total water column CaCO3 dissolution rate for the global oceans is approximately 0.5 +/- 0.2 petagrams of CaCO3-C per year, which is approximately 45 to 65% of the export production of CaCO3.