Alkalinity refers to the level of chemicals in a substance that make it less acidic. It measures how much of these chemicals are present, which can affect how an environment or solution reacts to acidic substances. Full definition
Three main characteristics were found: high alkalinity of this water, its micro-clusters size and its anti-oxidant properties. (altichealthprevention.com)
Goyet, C., C. Coatanoan, G. Eischeid, T. Amaoka, K. Okuda, R. Healy, and S. Tsunogai, 1999: Spatial variation of total CO2 and total alkalinity in the northern Indian Ocean: A novel approach for the quantification of anthropogenic CO2 in seawater. (pubs.giss.nasa.gov)
Superimposed on the diurnal signal was a transition during the second sampling period to a surplus of total alkalinity (TA) and dissolved inorganic carbon (DIC) compared to ocean endmember TA and DIC measurements. (news-oceanacidification-icc.org)