Abstract
The role of sea ice melting on the air-sea CO2 flux was investigated at two ice camps in the East Siberian Sea of the Arctic Ocean. On average, sea ice samples from the two ice camps had a total alkalinity (TA) of ∼108 and ∼31 μmol kg–1 and a corresponding salinity of 1.39 and 0.36, respectively. A portion (18–23% as an average) of these sea ice TA values was estimated to exist in the sea ice with zero salinity, which indicates the excess TA was likely attributed to chemical (CaCO3 formation and dissolution) and biological processes in the sea ice. The dilution by sea ice melting could increase the oceanic CO2 uptake to 11–12 mmol m–2 d–1 over the next 21 days if the mixed layer depth and sea ice thickness were assumed to be 18.5 and 1.5 m, respectively. This role can be further enhanced by adding TA (including excess TA) from sea ice melting, but a simultaneous release of dissolved inorganic carbon (DIC) counteracts the effect of TA supply. In our study region, the additional impact of sea ice melting with close to unity TA:DIC ratio on air-sea CO2 exchange was not significant.
Original language | English |
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Article number | 766810 |
Journal | Frontiers in Marine Science |
Volume | 9 |
DOIs | |
Publication status | Published - 2022 Feb 23 |
Bibliographical note
Funding Information:This work was supported by the Polar Academic Program (PE17900) funded by the Korea Polar Research Institute, and the project titled “Korea-Arctic Ocean Warming and Response of Ecosystem (K-AWARE),” the Korea Polar Research Institute (KOPRI) 1525011760, funded by the Ministry of Oceans and Fisheries, South Korea. KL was supported by National Research Foundation of Korea (NRF-2021R1A2C3008748).
Publisher Copyright:
Copyright © 2022 Mo, Yang, Kang, Kim, Lee, Ko, Kim and Kim.
Keywords
- Arctic Ocean
- East Siberian Sea
- ikaite
- sea ice melting
- total alkalinity
ASJC Scopus subject areas
- Oceanography
- Global and Planetary Change
- Aquatic Science
- Water Science and Technology
- Environmental Science (miscellaneous)
- Ocean Engineering