Updated climatological mean Δ f CO 2 and net sea–air CO 2 flux over the global open ocean regions

The late Taro Takahashi (Lamont-Doherty Earth Observatory (LDEO), Columbia University) and colleagues provided the first near-global monthly air–sea CO 2 flux climatology in Takahashi et al. (1997), based on available surface water partial pressure of CO 2 measurements. This product has been a bench...

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Bibliographic Details
Published in:Earth System Science Data
Main Authors: A. R. Fay, D. R. Munro, G. A. McKinley, D. Pierrot, S. C. Sutherland, C. Sweeney, R. Wanninkhof
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2024
Subjects:
Environmental sciences
GE1-350
Geology
QE1-996.5
Southern Ocean
Online Access:https://doi.org/10.5194/essd-16-2123-2024
https://doaj.org/article/d5e6746b28944b9a8a4d8cbd8735c249
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Summary:The late Taro Takahashi (Lamont-Doherty Earth Observatory (LDEO), Columbia University) and colleagues provided the first near-global monthly air–sea CO 2 flux climatology in Takahashi et al. (1997), based on available surface water partial pressure of CO 2 measurements. This product has been a benchmark for uptake of CO 2 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 <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="58pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="55d84f9403501279537900c710ee5dae"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="essd-16-2123-2024-ie00001.svg" width="58pt" height="10pt" src="essd-16-2123-2024-ie00001.png"/></svg:svg> 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.

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