Drivers of inorganic carbon dynamics in first-year sea ice: A model study.
Drivers of inorganic carbon dynamics in first-year sea ice: A model study.
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第一年海冰无机碳动力学的驱动因素：模型研究。
DOI：
10.1002/2014jc010388
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发表时间：
2015
影响因子：
--
通讯作者：
H. Goosse
中科院分区：
文献类型：
--
作者：
S. Moreau;M. Vancoppenolle;B. Delille;J. Tison;Jia;M. Kotovitch;D. Thomas;Nicolas;H. Goosse
海冰是二氧化碳（CO2）的活跃来源或汇，尽管在多大程度上尚不清楚。在这里，我们分析了海冰内的CO2动力学使用一维盐热力学海冰模型，包括气体物理和碳地球化学。用流体输运方程描述了溶解无机碳（DIC）和总碱度（TA）的冰-海通量和垂直输运。还包括碳酸盐化学、初级生产和呼吸对CO2的消耗和释放、伊卡石（CaCO 3·6 H2O）的沉淀和溶解以及冰-空气CO2通量。该模型进行了评估，从一个6个月的实地研究点巴罗，阿拉斯加，和冰槽实验的观察。在巴罗，结果表明，DIC预算主要是由物理过程驱动，而盐水-空气CO2通量，ikaite形成，净初级生产力，是次要因素。在冰-气CO2交换方面，海冰在冬季和夏季分别是CO2的净源和净汇。冰-大气CO2通量的公式影响模拟的近地表CO2分压（pCO 2），但不影响DIC预算。由于模拟的冰-大气CO2通量受DIC储存量的限制，因此<2 mmol m−2 d−1，我们认为，从涡度相关反演中观察到的更大的CO2通量不能用海冰直接来源来解释，必须涉及其他过程或其他CO2来源。最后，模拟结果表明，近地表TA/DIC比值为0.02，有时被用作钙化的指标，而不是表明除气。
Sea ice is an active source or a sink for carbon dioxide (CO2), although to what extent is not clear. Here, we analyze CO2 dynamics within sea ice using a one-dimensional halothermodynamic sea ice model including gas physics and carbon biogeochemistry. The ice-ocean fluxes, and vertical transport, of total dissolved inorganic carbon (DIC) and total alkalinity (TA) are represented using fluid transport equations. Carbonate chemistry, the consumption, and release of CO2 by primary production and respiration, the precipitation and dissolution of ikaite (CaCO3·6H2O) and ice-air CO2 fluxes, are also included. The model is evaluated using observations from a 6 month field study at Point Barrow, Alaska, and an ice-tank experiment. At Barrow, results show that the DIC budget is mainly driven by physical processes, wheras brine-air CO2 fluxes, ikaite formation, and net primary production, are secondary factors. In terms of ice-atmosphere CO2 exchanges, sea ice is a net CO2 source and sink in winter and summer, respectively. The formulation of the ice-atmosphere CO2 flux impacts the simulated near-surface CO2 partial pressure (pCO2), but not the DIC budget. Because the simulated ice-atmosphere CO2 fluxes are limited by DIC stocks, and therefore <2 mmol m−2 d−1, we argue that the observed much larger CO2 fluxes from eddy covariance retrievals cannot be explained by a sea ice direct source and must involve other processes or other sources of CO2. Finally, the simulations suggest that near-surface TA/DIC ratios of ∼2, sometimes used as an indicator of calcification, would rather suggest outgassing.
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影响因子：
5
作者：
S. Papadimitriou;H. Kennedy;P. Kennedy;Davis Thomas
通讯作者：
S. Papadimitriou;H. Kennedy;P. Kennedy;Davis Thomas
影响因子：
--
作者：
Nicolas-Xavier Geilfus;G. Carnat;G. Dieckmann;N. Halden;G. Nehrke;T. Papakyriakou;J. Tison;B. Delille
通讯作者：
Nicolas-Xavier Geilfus;G. Carnat;G. Dieckmann;N. Halden;G. Nehrke;T. Papakyriakou;J. Tison;B. Delille
影响因子：
1.6
作者：
M. Fischer;D. Thomas;A. Krell;G. Nehrke;J. Göttlicher;L. Norman;K. Meiners;C. Riaux-Gobin;G. Dieckmann
通讯作者：
M. Fischer;D. Thomas;A. Krell;G. Nehrke;J. Göttlicher;L. Norman;K. Meiners;C. Riaux-Gobin;G. Dieckmann
水钙石 (CaCO3·6H2O) 沉淀随 pH、盐度、温度和磷酸盐浓度变化的实验室研究
影响因子：
3
作者：
Wolf-Gladrow;Dieckmann;Völker;Nehrke
通讯作者：
Nehrke