What Drives the Latitudinal Gradient in Open Ocean Surface Dissolved Inorganic Carbon Concentration?

Yingxu Wu1, Toby Tyrrell2, Mathis Hain1, Matthew Paul Humphreys2 and Susan Elizabeth Hartman3, (1)University of Southampton, Southampton, United Kingdom, (2)University of Southampton, Ocean and Earth Science, Southampton, United Kingdom, (3)National Oceanography Center Southampton, Southampton, United Kingdom