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SSF-Svalbard Science Forum

Flux seasonality, drivers and wind-speed parameterisation of the gas transfer velocity in an Arctic fjord: Sea-air CO2 exchange in Isfjorden

Awarded: NOK 12,681

In this study we want to present the first direct (Eddy Covariance method) air-sea CO2 exchange time series from an arctic fjord in Svalbard. Direct continuous measurements of air-sea CO2 exchange are the key to understand how the flux varies in time and space. In addition to land-based flux measurements oceanic measurements will be used to determine the air-sea p CO2 gradient, which is expected to be the main driver of the flux as mentioned above. The pCO2 gradient is controlled by the oceanic conditions, but the turbulent exchange is driven by the atmosphere. Thus, the energy exchange at the air-ocean interface and the wind conditions affect the flux magnitude. This study aims for quantifying the seasonal CO2 sink/source strength of Adventfjorden, part of Isfjorden, with a November to June long feel campaign. The results will be used further to determine a regional gas exchange coefficient (k). The study is conducted by installing a eddy covariance flux mast at the shoreline by Adventpynten and by collecting water samples, CTD-casts and having a pCO2 sensor within the flux print area of the mast

Funding scheme:

SSF-Svalbard Science Forum