Table 3.

Global Alkalinity Balance of the Ocean (Tmol year⁻¹)

Alkalinity sources/sinks	Riverine DIC and carbonate burial balance	Complete alkalinity balance
Riverine DIC	32	32
Riverine PIC		21
Submarine Groundwater		1
Submarine Silicate		2.8
Sulfur Burial		4.7
Denitrification		1.5
Organic Matter Burial		3
Total Sources	32	66
Open Ocean Carbonate Burial	23	23
Ocean Margin Carbonate Burial	36	36
Reverse Weathering		1
Total Sinks	59	60
Imbalance	27	−6

Note. Supporting Information S3 provides a detailed documentation for the various terms, including the range.