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Updated climatological mean ΔfCO2 and net sea–air CO2 flux over the global open ocean regions
Earth System Science Data ( IF 11.4 ) Pub Date : 2024-05-02 , DOI: 10.5194/essd-16-2123-2024
Amanda R. Fay , David R. Munro , Galen A. McKinley , Denis Pierrot , Stewart C. Sutherland , Colm Sweeney , Rik Wanninkhof

Abstract. The late Taro Takahashi (Lamont-Doherty Earth Observatory (LDEO), Columbia University) and colleagues provided the first near-global monthly air–sea CO2 flux climatology in Takahashi et al. (1997), based on available surface water partial pressure of CO2 measurements. This product has been a benchmark for uptake of CO2 in the ocean. Several versions have been provided since, with improvements in procedures and large increases in observations, culminating in the authoritative assessment in Takahashi et al. (2009a, b). Here we provide and document the last iteration using a greatly increased dataset (SOCATv2022) and determining fluxes using air–sea partial pressure differences as a climatological reference for the period 1980–2021 (Fay et al., 2023, https://doi.org/10.25921/295g-sn13). The resulting net flux for the open ocean region is estimated as -1.79±0.7 Pg C yr−1, which compares well with other global mean flux estimates. While global flux results are consistent, differences in regional means and seasonal amplitudes are discussed. Consistent with other studies, we find the largest differences in the data-sparse southeast Pacific and Southern Ocean.

中文翻译:

更新了全球公海地区的气候平均值 ΔfCO2 和净海-气 CO2 通量

摘要。已故的高桥太郎(哥伦比亚大学拉蒙特-多尔蒂地球观测站(LDEO))及其同事在高桥等人的研究中提供了第一个近全球月度海气二氧化碳通量气候学数据。 (1997),基于可用的地表水 CO2 分压测量。该产品已成为海洋中二氧化碳吸收的基准。此后,随着程序的改进和观察的大量增加,已经提供了多个版本,最终形成了 Takahashi 等人的权威评估。 (2009a,b)。在这里,我们使用大幅增加的数据集 (SOCATv2022) 提供并记录最后一次迭代,并使用海气分压差确定通量,作为 1980-2021 年期间的气候参考(Fay 等人,2023,https://doi. org/10.25921/295g-sn13)。由此产生的公海区域净通量估计为-1.79±0.7 Pg C yr−1,与其他全球平均通量估计值相比较。虽然全球通量结果是一致的,但讨论了区域平均值和季节性幅度的差异。与其他研究一致,我们发现数据稀疏的东南太平洋和南大洋存在最大差异。
更新日期:2024-05-02
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