Complexity of Marine CO2 System Highlighted by Seasonal Asymmetries
Complexity of Marine CO2 System Highlighted by Seasonal Asymmetries
复制标题
季节性不对称凸显了海洋二氧化碳系统的复杂性
DOI：
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发表时间：
2018
影响因子：
5.2
通讯作者：
R. Woosley
中科院分区：
文献类型：
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作者：
R. Woosley
海洋碳循环的复杂性继续被发现。在本期中，Fassbender等人（2018，https：//doi.org/10.1029/2017GB005855）将测量的海洋表面二氧化碳分压（pCO2）与溶解无机碳增加的模型预测相结合，以探索季节性pCO2变化。他们发现，当其他变量（温度，盐度，总碱度和溶解无机碳）的季节性周期保持气候平均值时，pCO2的季节性振幅受到不对称的影响。因此，即使忽略其他自然或气候变化因素，pCO2的季节性循环将保持不变的假设也可能是无效的。Fassbender等人（2018）故意忽略了其他变量的影响，如全球变暖信号，以便明确地研究碳系统动态。结果表明，在研究二氧化碳通量时，特别是在未来，必须研究整个季节循环，因为一年中某个时间发生的事情可能不会转化为一年中的其他时间。实际上，这意味着为了充分了解海洋碳循环及其对大气CO2水平的控制，迫切需要更多的表面pCO2数据，涵盖一年中更多的月份，特别是在季节性很强的极地海洋。
The complexities of the marine carbon cycle continue to be uncovered. In this issue, Fassbender et al. (2018, https://doi.org/10.1029/2017GB005855) combined measured surface ocean partial pressure of carbon dioxide (pCO2) with model predictions of increases in dissolved inorganic carbon to explore seasonal pCO2 changes. They find that when seasonal cycles of other variables (temperature, salinity, total alkalinity, and dissolved inorganic carbon) are maintained to climatological means, seasonal amplitudes of pCO2 are affected asymmetrically. Thus, even ignoring other natural or climate change factors, the assumption that the seasonal cycle of pCO2 will be preserved may not be valid. Fassbender et al. (2018) intentionally ignore the influence of other variables such as a global warming signal in order to hone in explicitly on carbon system dynamics. The results show that when studying CO2 fluxes, especially into the future, the full seasonal cycle must be investigated, as what happens at one time of year may not translate to the rest of the year. Practically, this means that in order to fully understand the marine carbon cycle and its control over atmospheric CO2 levels, there is an urgent need for more surface pCO2 data covering more months of the year particularly in the polar oceans that are highly seasonally biased.