Articles | Volume 16, issue 13
Research article
11 Jul 2019
Research article |  | 11 Jul 2019

What drives the latitudinal gradient in open-ocean surface dissolved inorganic carbon concentration?

Yingxu Wu, Mathis P. Hain, Matthew P. Humphreys, Sue Hartman, and Toby Tyrrell


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Discussed (final revised paper)

Latest update: 21 Sep 2023
Short summary
This study takes advantage of the GLODAPv2 database to investigate the processes driving the surface ocean dissolved inorganic carbon distribution, with the focus on its latitudinal gradient between the polar oceans and the low-latitude oceans. Based on our quantitative study, we find that temperature-driven CO2 gas exchange and high-latitude upwelling of DIC- and TA-rich deep waters are the two major drivers, with the importance of the latter not having been previously realized.
Final-revised paper