The Northeast Greenland shelf as a late-summer CO2 source to the atmosphere

The Northeast Greenland shelf carbon system is largely undescribed with the exception of the region associated with the Northeast Water Polynya. We describe the carbon system and the dominant processes affecting it in the region between 24 August and 25 September 2017. During this period the shelf w...

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Bibliographic Details
Main Authors: Willcox, Esdoorn, Lemes, Marcos, Juul-Pedersen, Thomas, Sejr, Mikael Kristian, Holding, Johnna Michelle, Rysgaard, Søren
Format: Text
Language:English
Published: 2024
Subjects:
Arctic
Greenland
Sea ice
Online Access:https://doi.org/10.5194/egusphere-2024-6
https://egusphere.copernicus.org/preprints/2024/egusphere-2024-6/
Description
Summary:The Northeast Greenland shelf carbon system is largely undescribed with the exception of the region associated with the Northeast Water Polynya. We describe the carbon system and the dominant processes affecting it in the region between 24 August and 25 September 2017. During this period the shelf was largely sea ice free and although the north shelf was a carbon dioxide sink, the rest of the shelf and slope acted as both source and sink. This is in contrast to the common perception for this Arctic outflow shelf region as a CO 2 sink during the ice-free season. In the southern end of our sampling area, and particularly along the slope, low values of TA can lead to the shelf being a strong carbon dioxide source to the atmosphere. We hypothesize on the possible causes for this low TA.

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