Arctic and Antarctic sea ice acts as a sink for atmospheric CO2 during periods of snow melt and surface flooding
Arctic and Antarctic sea ice acts as a sink for atmospheric CO2 during periods of snow melt and surface flooding
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在雪融化和地表洪水期间，北极和南极海冰充当大气二氧化碳的汇
DOI：
10.1002/2013jc009048
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发表时间：
2013
影响因子：
3.6
通讯作者：
Hashida G.
中科院分区：
文献类型：
--
作者：
Nomura D;Granskog MA;Assmy P;Simizu D;Hashida G.
在这项研究中，我们提出的证据表明，南极和北极海冰作为汇大气CO2在融雪和表面洪水期间。直接在淹没海冰表面测量的CO2通量（Fflood）构成了-1.1 ± 0.9 mmol C m-2d-1（平均值± 1 SD）的净CO2汇，这比在雪-空气表面（Fsnow）和裸冰面（Fice）测量的通量高一个数量级。Fsnow/Fridio随着雪和叠加冰的水当量的增加而减小，这表明雪和叠加冰形成的性质影响CO2通量的大小。F雪/F冰比值在0.1至0.5之间，说明洪水表面50-90%的潜在通量由于雪/叠加冰的存在而减少。因此，积雪特性和叠加冰在海冰-雪-大气界面的CO2通量中起着重要作用。
In this study, we present evidence that Antarctic and Arctic sea ice act as sink for atmospheric CO2during periods of snowmelt and surface flooding. The CO2flux measured directly at the flooded sea ice surface (Fflood) constituted a net CO2sink of −1.1 ± 0.9 mmol C m−2d−1(mean ± 1 SD), which was an order of magnitude higher than the flux measured at the snow‐air surface (Fsnow) and bare ice surface (Fice). TheFsnow/Ffloodratio decreased with increasing water equivalent of snow and superimposed‐ice, suggesting that the properties of snow and superimposed‐ice formation affect the magnitude of the CO2flux. TheFsnow/Ffloodratio ranged from 0.1 to 0.5, illustrating that 50–90% of the potential flux at the flooded surface was reduced due to the presence of snow/superimposed‐ice. Hence, snow cover properties and superimposed‐ice play an important role in the CO2fluxes across the sea ice‐snow‐atmosphere interface.