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Increased oceanic dimethyl sulfide emissions in areas of sea ice retreat inferred from a Greenland ice core

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Title: Increased oceanic dimethyl sulfide emissions in areas of sea ice retreat inferred from a Greenland ice core
Authors: Kurosaki, Yutaka Browse this author
Matoba, Sumito Browse this author →KAKEN DB
Iizuka, Yoshinori Browse this author →KAKEN DB
Fujita, Koji Browse this author →KAKEN DB
Shimada, Rigen Browse this author
Keywords: Cryospheric science
Marine chemistry
Issue Date: 26-Dec-2022
Journal Title: Communications Earth & Environment
Volume: 3
Issue: 1
Start Page: 327
Publisher DOI: 10.1038/s43247-022-00661-w
Abstract: Ocean phytoplankton are an important source of dimethyl sulfide, which influences marine cloud formation. Model studies suggest that declines in Arctic sea ice may lead to increased dimethyl sulfide emissions, however observational support is lacking. Here, we present a 55-year high-resolution ice core record of methane sulfonic acid flux, an oxidation product of dimethyl sulfide, from the southeast Greenland Ice Sheet. We infer temporal variations in ocean dimethyl sulfide emissions and find that springtime (April–June) fluxes of methane sulfonic acid correlate well with satellite-derived chlorophyll-a concentration in the Irminger Sea. Summertime (July–September) methane sulfonic acid fluxes were 3 to 6 times higher between 2002–2014 than 1972–2001. We attribute this to sea ice retreat day becoming earlier and a coincident increase in chlorophyll-a concentration in the adjacent open coastal waters.
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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