Where is mineral ballast important for surface export of particulate organic carbon in the ocean?

Le Moigne, Frederic A.C.; Pabortsava, Katsiaryna; Marcinko, Charlotte L.J.; Martin, Patrick; Sanders, Richard J. 2014 Where is mineral ballast important for surface export of particulate organic carbon in the ocean? Geophysical Research Letters, 41 (23). 8460-8468. https://doi.org/10.1002/2014GL061678