Modern state of the aragonite saturation and carbon dioxide fluxes in the Kara and Laptev seas (text & video)

OA Week 2021, Arctic Hub Session

Dr. Alexander Polukhin, Shirshov Institute of Oceanology, Russian Academy of Sciences, Russia


The processes occurring in the areas of the outer shelf and the continental slope of the Siberian epicontinental seas play a huge role in the regulation of the biogeochemical regime and substance fluxes, and the formation of biological productivity. These processes are associated with current climatic trends, since it is in the area of the Arctic continental slope that the current trend of a decrease in ice cover and an increase in the duration of the ice-free period in the Arctic is most pronounced. One of the most important characteristics of matter fluxes in Arctic ecosystems is the exchange of carbon dioxide at the ocean-atmosphere interface. As a result of our studies, it became obvious that, over a significant latitudinal extent of the water in the area of the outer shelf and continental slope of the Kara and Laptev seas, in the summer season, CO2 flows from the atmosphere into the surface layer of the sea. And the main factor affecting the aragonite saturation on the shallow shelf of the seas is the river runoff due to an increase in the removal of carbon in various forms from the land.

Ocean Acidification Week 2021 was sponsored by the following organizations:

(1) GOA-ON, the Global Ocean Acidification Observing Network,

(2) NOAA, the United States National Oceanic & Atmospheric Administration,

(3) IAEA OA-ICC, the International Atomic Energy Agency – Ocean Acidification International Coordination Centre, and

(4) IOC-UNESCO – the Intergovernmental Oceanographic Commission of the United Nations Educational, Scientific and Cultural Organization

For more information, please visit

GOA-ON, YouTube, 24 September 2021. Text and video.

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