Organic and black carbon 13C and 14C through the Santa Monica Basin sediment oxic-anoxic transition

Details Organic and black carbon 13C and 14C through the Santa Monica Basin sediment oxic-anoxic transition Organic and black carbon 13C and 14C through the Santa Monica Basin sediment oxic-anoxic transition

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30d..34m&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 4, pp. 34-1, CiteID 1185, DOI 10.1029/2002GL015050

Physics

6

Geochemistry: Geochemical Cycles (0330), Oceanography: General: Continental Shelf Processes, Global Change: Biogeochemical Processes (4805), Geochemistry: Marine Geochemistry (4835, 4850), Geochemistry: Isotopic Composition/Chemistry

Scientific paper

Black carbon (BC) is a significant percentage of sedimentary organic carbon (SOC) at abyssal ocean sites, but its presence in shelf sediments is not well studied. Approximately 1600AD, Santa Monica Basin bottom waters shifted from oxic to very low oxygen (dysoxic) deposition conditions. Under oxic deposition conditions BC was 11 +/- 4% of SOC, whereas after the overlying water became dysoxic (and sediments became anoxic), BC was 5.2 +/- 1.2% of SOC. This shift may reflect the preferential remineralization of non-black SOC under oxic conditions. There is an offset between BC and SOC 14C ages which changes with oxidation conditions, suggesting that BC storage is related to oxygen exposure and confirming a previously published report of the vulnerability of BC to sedimentary oxidation [Middelburg, 1999]. Terrestrial carbon is 17 +/- 5% of total SOC in this core's anoxic region, and 31 +/- 11% of this terrestrial carbon is BC.

Affiliated with

Also associated with

No associations

Rating

Organic and black carbon 13C and 14C through the Santa Monica Basin sediment oxic-anoxic transition 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 and black carbon 13C and 14C through the Santa Monica Basin sediment oxic-anoxic transition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Organic and black carbon 13C and 14C through the Santa Monica Basin sediment oxic-anoxic transition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-922453