Gas transfer velocities in Norwegian fjords and the adjacent North Atlantic waters

• Autorzy: Banko-Kubis Hanne M. , Wurl Oliver , Mustaffa Nur Ili Hamizah , Ribas-Ribas Mariana

Identyfikatory

DOI

10.1016/j.oceano.2019.04.002

• Języki publikacji: EN

Abstrakty

EN

We investigated air-sea carbon dioxide (CO₂) transfer in situ to determine the role of wind and turbulence in forcing gas transfer. In situ gas transfer velocities of CO₂ were measured with a floating chamber technique along the Norwegian coast and inside the Sogne- and Trondheimsfjord. Gas transfer velocities were related to wind speed and turbulence, but neither wind speed nor turbulence can satisfactorily predict gas transfer velocity. However, comparison to existing wind-based parameterizations showed that the data from this study have a similar trend. Generally, we measured higher transfer velocities than the parameterizations predict. In the North Atlantic, we measured transfer velocities of up to 54.9 cm h^-1 versus predicted transfer velocities of 6.3 cm h^-1 at a wind speed of 3.7 m s^-1. In addition, we observed that measurements of transfer velocities at wind speeds below 4 m s^-1 are higher than predictions. Wind-based parameterizations are lacking data in the low wind regime for validation, and we provide 25 data points for this critical wind speed range. Overall, results indicate that Norwegian fjords and the adjacent North Atlantic are sinks for atmospheric CO₂ during summer, with uptake rates of -9.6 ± 7.6 μmol m^-2 min^-1 and -4.1 ± 1.7 μmol m^-2 min^-1, respectively. Due to the low partial pressure of CO₂ in the upper water layer of the stratified fjords (down to 150.7 μatm), the Sogne- and Trondheimsfjord absorb 196 tons of carbon per day during the summer.

Słowa kluczowe

EN

air-sea CO2 flux; gas transfer velocity; gas exchange; parameterization; fjord

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2019
• Tom: No. 61 (4)
• Strony: 460--470
• Opis fizyczny: Bibliogr. 57 poz., mapa, tab., wykr.

Twórcy

autor

Banko-Kubis Hanne M.

• Center for Marine Sensors, Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University of Oldenburg, Wilhelmshaven, Germany

autor

Wurl Oliver

• Center for Marine Sensors, Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University of Oldenburg, Wilhelmshaven, Germany

autor

Mustaffa Nur Ili Hamizah

• Center for Marine Sensors, Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University of Oldenburg, Wilhelmshaven, Germany

autor

Ribas-Ribas Mariana

• Center for Marine Sensors, Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University of Oldenburg, Wilhelmshaven, Germany

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).