Changes in the arctic ocean carbon cycle with diminishing ice cover
DeGrandpre, Michael D.
Krishfield, Richard A.
Williams, William J.
MetadataShow full item record
KeywordArctic Ocean; ice concentration; seawater CO2; interannual variability; Canada Basin; shipboard CO2 measurements
Less than three decades ago only a small fraction of the Arctic Ocean (AO) was ice free and then only for short periods. The ice cover kept sea surface pCO2 at levels lower relative to other ocean basins that have been exposed year round to ever increasing atmospheric levels. In this study, we evaluate sea surface pCO2 measurements collected over a 6‐year period along a fixed cruise track in the Canada Basin. The measurements show that mean pCO2 levels are significantly higher during low ice years. The pCO2 increase is likely driven by ocean surface heating and uptake of atmospheric CO2 with large interannual variability in the contributions of these processes. These findings suggest that increased ice‐free periods will further increase sea surface pCO2, reducing the Canada Basin's current role as a net sink of atmospheric CO2.
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in DeGrandpre, M., Evans, W., Timmermans, M., Krishfield, R., Williams, B., & Steele, M. Changes in the arctic ocean carbon cycle with diminishing ice cover. Geophysical Research Letters, 47(12), (2020): e2020GL088051, doi:10.1029/2020GL088051.
Suggested CitationDeGrandpre, M., Evans, W., Timmermans, M., Krishfield, R., Williams, B., & Steele, M. (2020). Changes in the arctic ocean carbon cycle with diminishing ice cover. Geophysical Research Letters, 47(12), e2020GL088051.
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Radium isotopes across the Arctic Ocean show time scales of water mass ventilation and increasing shelf inputs Rutgers van der Loeff, Michiel M.; Kipp, Lauren; Charette, Matthew A.; Moore, Willard S.; Black, Erin E.; Stimac, Ingrid; Charkin, Alexander; Bauch, Dorothea; Valk, Ole; Karcher, Michael; Krumpen, Thomas; Casacuberta, Nuria; Smethie, William M.; Rember, Robert (John Wiley & Sons, 2018-07-13)The first full transarctic section of 228Ra in surface waters measured during GEOTRACES cruises PS94 and HLY1502 (2015) shows a consistent distribution with maximum activities in the transpolar drift. Activities in the ...
Freshwater and its role in the Arctic Marine System : sources, disposition, storage, export, and physical and biogeochemical consequences in the Arctic and global oceans Carmack, Edward C.; Yamamoto-Kawai, Michiyo; Haine, Thomas W. N.; Bacon, Sheldon; Bluhm, Bodil A.; Lique, Camille; Melling, Humfrey; Polyakov, Igor V.; Straneo, Fiamma; Timmermans, Mary-Louise; Williams, William J. (John Wiley & Sons, 2016-03-30)The Arctic Ocean is a fundamental node in the global hydrological cycle and the ocean's thermohaline circulation. We here assess the system's key functions and processes: (1) the delivery of fresh and low-salinity waters ...
Recent advances in Arctic ocean studies employing models from the Arctic Ocean Model Intercomparison Project Proshutinsky, Andrey; Aksenov, Yevgeny; Kinney, Jaclyn Clement; Gerdes, Rudiger; Golubeva, Elena; Holland, David; Holloway, Greg; Jahn, Alexandra; Johnson, Mark; Popova, Ekaterina E.; Steele, Michael; Watanabe, Eiji (Oceanography Society, 2011-09)Observational data show that the Arctic Ocean has significantly and rapidly changed over the last few decades, which is unprecedented in the observational record. Air and water temperatures have increased, sea ice volume ...