Changes in column inventories of carbon and oxygen in the Atlantic Ocean
Changes in column inventories of carbon and oxygen in the Atlantic Ocean
复制标题
大西洋碳和氧柱库存的变化
DOI：
10.5194/bg-9-4819-2012
复制
发表时间：
2012
期刊：
影响因子：
4.9
通讯作者：
R. Keeling
中科院分区：
文献类型：
--
作者：
T. Tanhua;R. Keeling
抽象的。预计内陆海洋中溶解无机碳浓度的增加是大气中CO2浓度增加的直接后果。这种额外的DIC通常被称为人为碳（Cant），其在内陆海洋中的库存或增加率以前已经通过多种观测方法进行了估计。这些方法中的每一种都与难以测试的假设相关联，因为无法直接观察到Cant。结果从一个更简单的概念，更少的假设适用于大西洋在这里报告使用两个大型数据收集的碳相关的瓶数据。本文计算了大西洋DIC、呼吸补偿DIC和氧在十年时间尺度上的柱存量变化，即储存率。我们在95%水平（CI）报告储存率和平均趋势的置信区间，反映平均趋势，但不考虑空间和时间采样的潜在偏倚效应。对于整个大西洋，DIC和氧气的平均趋势在95%置信水平下为非零：DIC：0.86（CI：0.72-1.00）和氧气：-0.24（CI：-0.41-（-0.07））mol m-2 yr-1。对于氧气，整个大西洋的趋势主要是由亚极地北大西洋，而其他地区的O2趋势并不显着。储存率与其他研究发现的变化相似，但具有很大的不确定性。对于副极地北大西洋的存储率显示出显着的时间和区域变化的所有变量。这似乎是由于不同DIC和氧浓度的地下水质量的流行率的变化，导致有时不同的迹象DIC的存储率相比，公布的铁路超高估计。这项研究表明，准确评估海洋吸收CO2将需要会计不仅影响Cant的过程，但也修改CO2存储的其他过程。
Abstract. Increasing concentrations of dissolved inorganic carbon (DIC) in the interior ocean are expected as a direct consequence of increasing concentrations of CO2 in the atmosphere. This extra DIC is often referred to as anthropogenic carbon (Cant), and its inventory, or increase rate, in the interior ocean has previously been estimated by a multitude of observational approaches. Each of these methods is associated with hard to test assumptions since Cant cannot be directly observed. Results from a simpler concept with fewer assumptions applied to the Atlantic Ocean are reported on here using two large data collections of carbon relevant bottle data. The change in column inventory on decadal time scales, i.e. the storage rate, of DIC, respiration compensated DIC and oxygen is calculated for the Atlantic Ocean. We report storage rates and the confidence intervals of the mean trend at the 95% level (CI), reflecting the mean trend but not considering potential biasing effects of the spatial and temporal sampling. For the whole Atlantic Ocean the mean trends for DIC and oxygen are non-zero at the 95% confidence level: DIC: 0.86 (CI: 0.72–1.00) and oxygen: −0.24 (CI: −0.41–(−0.07)) mol m−2 yr−1. For oxygen, the whole Atlantic trend is dominated by the subpolar North Atlantic, whereas for other regions the O2 trends are not significant. The storage rates are similar to changes found by other studies, although with large uncertainty. For the subpolar North Atlantic the storage rates show significant temporal and regional variation of all variables. This seems to be due to variations in the prevalence of subsurface water masses with different DIC and oxygen concentrations leading to sometimes different signs of storage rates for DIC compared to published Cant estimates. This study suggest that accurate assessment of the uptake of CO2 by the oceans will require accounting not only for processes that influence Cant but also additional processes that modify CO2 storage.
DOI：
10.1016/j.dsr2.2010.10.061
发表时间：
2011-09-01
影响因子：
3
作者：
Rhein, Monika;Kieke, Dagmar;Yashayaev, Igor
通讯作者：
Yashayaev, Igor
DOI：
10.1016/j.dsr.2012.05.007
发表时间：
2012-09-01
影响因子：
2.4
作者：
Schneider, A.;Tanhua, T.;Wallace, D. W. R.
通讯作者：
Wallace, D. W. R.