Open AccessSpace-time ph variability in the Black Sea
Author(s) -
A. B. Polonsky,
Е.А. Grebneva
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524864494-499
Subject(s) - atmosphere (unit) , carbon dioxide , ocean acidification , black sea , carbon black , surface layer , environmental science , chemistry , atmospheric sciences , layer (electronics) , environmental chemistry , seawater , oceanography , meteorology , geology , physics , natural rubber , organic chemistry
Based on the archival data for the period from 1956 to 2010, space-time pH changes in the Black Sea upper layer are analyzed. In the surface layer, a statistically significant decreasing in the pH value (at a level of -0.06 pH units per 50 years) was found. It is mostly due to the growing concentrations of carbon dioxide in the atmosphere. Intermediate layers are characterized by a negative pH trend which absolute value more than fivefold exceeds the surface pH trend. Likely reason of the pH decreases here is a long-term upward moving of acidic waters with a typical velocity of ~1 m per year.