Table 1 Corrections and revisions to the estimate of global ocean anthropogenic CO2 uptake

From: Asymmetric bubble-mediated gas transfer enhances global ocean CO2 uptake

Oceanic CO2 uptake estimates

GCB 2023

Corrections

Revised flux

Asymmetric effect

Cool skin effect

Warm bias

Based on SOCAT data

2.60

0.37

0.25

0.17

3.39

Based on models

2.23

0.12

0.08

–

2.43

  1. Two independent oceanic CO2 uptake estimates are made in the Global Carbon Budget (GCB) 20232. The values in the “asymmetric effect“ column represent the ensemble mean of the flux corrections using two Δs parameterisations (Eqs. 5 and 6). The correction to the model-based flux estimate is assumed to be ~1/3 of the correction to the data-based flux estimate30. The warm bias correction is taken from ref. 28. All numbers in the table are in Pg C yr−1 and represent the average from 1991 to 2020.
Back to article page