Organic carbon and nitrogen composition in the sediment of the Kara Sea, Arctic Ocean during the Last Glacial Maximum to Holocene times

Details Organic carbon and nitrogen composition in the sediment of the Kara Sea, Arctic Ocean during the Last Glacial Maximum to Holocene times Organic carbon and nitrogen composition in the sediment of the Kara Sea, Arctic Ocean during the Last Glacial Maximum to Holocene times

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3412607k&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 12, CiteID L12607

Physics

2

Geochemistry: Organic And Biogenic Geochemistry, Geochemistry: Stable Isotope Geochemistry (0454, 4870), Oceanography: General: Arctic And Antarctic Oceanography (9310, 9315)

Scientific paper

A sharp decrease in Corg/Ntot ratios and apparently heavier stable isotope ratios of Corg and Ntot (δ 13Corg and δ 15Ntot) after deglaciation were observed in sediment cores St-25 and St-34 collected from the Saint Anna Trough in the Kara Sea, exhibiting a change of sediment origin from terrestrial to marine during the LGM and Holocene times. Organic nitrogen (Norg) contributed about 40% to total nitrogen (Ntot) during the Holocene, but the Norg fraction was hardly observed in the lower LGM sediments (below 120 cm depth in St-25 and beneath 170 cm in St-34). This may be due to a permanent cover of sea ice in the area during the LGM. In addition, the δ 13C values for OClabile and OCresi were remarkably different between LGM and Holocene sediment. The unexpected lighter δ 13C values for OCresi for the LGM period might be due to methanotrophic bacteria in the sediment of Kara Sea.

Affiliated with

Also associated with

No associations

Rating

Organic carbon and nitrogen composition in the sediment of the Kara Sea, Arctic Ocean during the Last Glacial Maximum to Holocene times does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Organic carbon and nitrogen composition in the sediment of the Kara Sea, Arctic Ocean during the Last Glacial Maximum to Holocene times, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Organic carbon and nitrogen composition in the sediment of the Kara Sea, Arctic Ocean during the Last Glacial Maximum to Holocene times will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-879615