Strong Southern Ocean carbon uptake evident in airborne observations

Strong Southern Ocean carbon uptake evident in airborne observations
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机载观测显示南大洋碳吸收强劲

DOI:
10.1126/science.abi4355
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发表时间:
2021
期刊:
影响因子:
56.9
通讯作者:
Chevallier, Frederic
Chevallier, Frederic
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Long, Matthew C.;Stephens, Britton B.;McKain, Kathryn;Sweeney, Colm;Keeling, Ralph F.;Kort, Eric A.;Morgan, Eric J.;Bent, Jonathan D.;Chandra, Naveen;Chevallier, Frederic

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南大洋在确定大气二氧化碳(CO2)方面发挥着重要作用,但对该区域海气CO2通量的估计差异很大。在这项研究中,我们约束南大洋海气CO2交换通量的水平和垂直CO2梯度在大气传输模型和应用大气观测这些梯度来估计通量。基于飞机的垂直大气CO2梯度的测量提供了强大的通量约束。我们发现,在2009-2018年期间,45°S以南的年平均碳通量(净吸收)为-0.53 ± 0.23千兆克。这是一致的平均大气逆温估计和表面海洋分压的CO2(PCO 2)为基础的产品,但我们的数据表明更强的年平均吸收比最近的解释剖析浮子观测建议。
The Southern Ocean plays an important role in determining atmospheric carbon dioxide (CO2), yet estimates of air-sea CO2flux for the region diverge widely. In this study, we constrained Southern Ocean air-sea CO2exchange by relating fluxes to horizontal and vertical CO2gradients in atmospheric transport models and applying atmospheric observations of these gradients to estimate fluxes. Aircraft-based measurements of the vertical atmospheric CO2gradient provide robust flux constraints. We found an annual mean flux of –0.53 ± 0.23 petagrams of carbon per year (net uptake) south of 45°S during the period 2009–2018. This is consistent with the mean of atmospheric inversion estimates and surface-ocean partial pressure of CO2(Pco2)–based products, but our data indicate stronger annual mean uptake than suggested by recent interpretations of profiling float observations.
从地表到平流层下部以及从极到极的氧气浓度的机载测量
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发表时间: 2020
影响因子: 3.8
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根据德雷克海峡营养物、溶解无机碳和表层海洋 pCO2 的时间序列观测(2002-2011 年)确定的南大洋群落净生产估计
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