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Carbon at the coastal interface

机译:沿海界面的碳

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摘要

The thin strip of coastal ocean at the interface between land and the vast areas of the open sea contains some of the most biologically productive areas of the world's oceans. These coastal regions support most of the marine resources harvested by humans', despite covering only a tiny fraction of the ocean's surface area. One would expect these regions to act as strong sinks for atmospheric carbon dioxide because of their high rates of photosynthetic carbon fixation. Indeed, an early estimate from the late 1990s suggested a coastal-ocean sink strength of about 1 peta-gram of carbon per year (Pg C yr~(-1); 1 petagram is 10~(15)g) - a value that, when combined with the open-ocean sink strength of about 2.3 ± 0.7 Pg Cyr~(-1), would make the ocean by far the largest sink for the CO_2 that humans emit every year into the atmosphere. Reporting in Global Biogeochemical Cycles, Laruelle and coauthors now show that the global coastal ocean is a much smaller CO_2 sink than was thought, amounting to only about 0.2 Pg C yr~(-1).
机译:陆地和公海之间的交界处的沿海海洋薄带包含了世界上海洋中生物产量最高的地区。尽管仅覆盖了海洋表层的一小部分,但这些沿海地区仍支持着人类捕捞的大部分海洋资源。人们会期望这些区域由于其光合作用的碳固定率高而成为大气二氧化碳的强大汇。的确,从1990年代后期开始的早期估算表明,沿海海洋汇的碳强度约为每年1皮克/克(Pg C yr〜(-1); 1皮克为10〜(15)g)-该值等于,再加上约2.3±0.7 Pg Cyr〜(-1)的开阔海洋汇聚强度,将使海洋成为迄今为止人类每年向大气中排放的最大CO_2汇聚体。 Laruelle及其合作者在《全球生物地球化学循环》中的报告中指出,全球沿海海洋的CO_2汇比想象的要小得多,仅约0.2 Pg C yr〜(-1)。

著录项

  • 来源
    《Nature》 |2015年第7533期|148-149|共2页
  • 作者

    NICOLAS GRUBER;

  • 作者单位

    Environmental Physics Group, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, 8092 Zurich, Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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