{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T06:08:33Z","timestamp":1772258913757,"version":"3.50.1"},"reference-count":110,"publisher":"Copernicus GmbH","issue":"4","license":[{"start":{"date-parts":[[2015,4,17]],"date-time":"2015-04-17T00:00:00Z","timestamp":1429228800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Clim. Past"],"abstract":"<jats:p>Abstract. We present results from a sediment core collected from a pockmark field on the Vestnesa Ridge (~ 80\u00b0 N) in the eastern Fram Strait. This is the only deep-water gateway to the Arctic, and one of the northernmost marine gas hydrate provinces in the world. Eight 14C AMS dates reveal a detailed chronology for the last 14 ka BP. The \u03b4 13C record measured on the benthonic foraminiferal species Cassidulina neoteretis shows two distinct intervals with negative values termed carbon isotope excursion (CIE I and CIE II, respectively). The values were as low as \u22124.37\u2030 in CIE I, correlating with the B\u00f8lling\u2013Aller\u00f8d interstadials, and as low as \u22123.41\u2030 in CIE II, correlating with the early Holocene. In the B\u00f8lling\u2013Aller\u00f8d interstadials, the planktonic foraminifera also show negative values, probably indicating secondary methane-derived authigenic precipitation affecting the foraminiferal shells. After a cleaning procedure designed to remove authigenic carbonate coatings on benthonic foraminiferal tests from this event, the 13C values are still negative (as low as \u22122.75\u2030). The CIE I and CIE II occurred during periods of ocean warming, sea-level rise and increased concentrations of methane (CH4) in the atmosphere. CIEs with similar timing have been reported from other areas in the North Atlantic, suggesting a regional event. The trigger mechanisms for such regional events remain to be determined. We speculate that sea-level rise and seabed loading due to high sediment supply in combination with increased seismic activity as a result of rapid deglaciation may have triggered the escape of significant amounts of methane to the seafloor and the water column above.<\/jats:p>","DOI":"10.5194\/cp-11-669-2015","type":"journal-article","created":{"date-parts":[[2015,4,17]],"date-time":"2015-04-17T04:49:01Z","timestamp":1429246141000},"page":"669-685","source":"Crossref","is-referenced-by-count":52,"title":["Carbon isotope (\u03b4\n                    <sup>13<\/sup>\n                    C) excursions suggest times of major methane release during the last 14 kyr in Fram Strait, the deep-water gateway to the Arctic"],"prefix":"10.5194","volume":"11","author":[{"given":"C.","family":"Consolaro","sequence":"first","affiliation":[]},{"given":"T. L.","family":"Rasmussen","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9411-1729","authenticated-orcid":false,"given":"G.","family":"Panieri","sequence":"additional","affiliation":[]},{"given":"J.","family":"Mienert","sequence":"additional","affiliation":[]},{"given":"S.","family":"B\u00fcnz","sequence":"additional","affiliation":[]},{"given":"K.","family":"Sztybor","sequence":"additional","affiliation":[]}],"member":"3145","published-online":{"date-parts":[[2015,4,17]]},"reference":[{"key":"ref1","doi-asserted-by":"crossref","unstructured":"Aagaard, K., Swift, J. H., and Carmack, E. C.: Thermohaline circulation in the Arctic Mediterranean Seas, J. Geophys. Res., 90, 4833\u20134846, 1985.","DOI":"10.1029\/JC090iC03p04833"},{"key":"ref2","doi-asserted-by":"crossref","unstructured":"Aagaard, K., Foldvik, A., and Hillman, S. R.: The West Spitsbergen Current: disposition and water mass transformation, J. Geophys. 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