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An estimate of anthropogenic CO2 inventory from decadal changes in oceanic carbon content

机译:根据海洋碳含量的十年变化估算人为二氧化碳清单

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摘要

Increased knowledge of the present global carbon cycle is important for our ability to understand and to predict the future carbon cycle and global climate. Approximately half of the anthropogenic carbon released to the atmosphere from fossil fuel burning is stored in the ocean, although distribution and regional fluxes of the ocean sink are debated. Estimates of anthropogenic carbon (Cant) in the oceans remain prone to error arising from (i) a need to estimate preindustrial reference concentrations of carbon for different oceanic regions, and (ii) differing behavior of transient ocean tracers used to infer Cant. We introduce an empirical approach to estimate Cant that circumvents both problems by using measurement of the decadal change of ocean carbon concentrations and the exponential nature of the atmospheric Cant increase. In contrast to prior approaches, the results are independent of tracer data but are shown to be qualitatively and quantitatively consistent with tracer-derived estimates. The approach reveals more Cant in the deep ocean than prior studies; with possible implications for future carbon uptake and deep ocean carbonate dissolution. Our results suggest that this approachs applied on the unprecedented global data archive provides a means of estimating the Cant for large parts of the world's ocean.
机译:对当前全球碳循环的了解不断增加,对于我们了解和预测未来碳循环和全球气候的能力至关重要。化石燃料燃烧释放到大气中的大约一半人为碳都存储在海洋中,尽管人们对海洋汇的分布和区域通量存有争议。由于(i)需要估计不同海洋区域的工业前碳参考浓度,以及(ii)用于推断Cant的瞬态海洋示踪剂的不同行为,因此对海洋中人为碳(Cant)的估计仍然容易出错。我们引入一种经验方法来估计Cant,该方法通过使用海洋碳浓度的年代际变化和大气Cant指数增加的指数性质的度量来规避这两个问题。与先前的方法相比,结果独立于示踪剂数据,但显示出定性和定量与示踪剂来源的估计值一致。该方法比以前的研究揭示了深海中更多的Cant。对未来的碳吸收和深海碳酸盐的溶解可能产生影响。我们的结果表明,这种方法应用于空前的全球数据存档,为估算世界大部分海洋的Cant提供了一种方法。

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