Photoproduction of carbon monoxide in first-year sea ice in Franklin Bay, southeastern Beaufort Sea

Details Photoproduction of carbon monoxide in first-year sea ice in Franklin Bay, southeastern Beaufort Sea Photoproduction of carbon monoxide in first-year sea ice in Franklin Bay, southeastern Beaufort Sea

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3212606x&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 12, CiteID L12606

Mathematics

Logic

7

Cryosphere: Sea Ice (4540), Oceanography: Biological And Chemical: Biogeochemical Cycles, Processes, And Modeling (0412, 0414, 0793, 1615, 4912), Oceanography: Biological And Chemical: Carbon Cycling (0428), Oceanography: Biological And Chemical: Gases, Oceanography: Biological And Chemical: Photochemistry

Scientific paper

The concentration of carbon monoxide ([CO]) in first-year ice in Franklin Bay, southeastern Beaufort Sea, was ~40 times higher than in the underlying seawater and ~15 times higher than in the adjacent open water. The [CO] in the sea ice decreased with increasing depth and increased rapidly at the bottom where there was an abundance of ice microalgae. The depth distribution of [CO] was consistent with a photochemical source of this compound in sea ice, which was further inferred from the vertical profiles of the dissolved organic matter absorption coefficients and directly verified by incubation of ice samples refrozen from melted ice. Results from this study suggest that substantial photooxidation of organic matter occurs in sea ice. This process may affect the organic carbon cycle in the Arctic Ocean. The potential flux of CO from sea ice to the Arctic atmosphere is estimated to be 1.4 × 1010 moles a-1.

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