Decadal Change in Sediment Community Oxygen Consumption in the Abyssal Northeast Pacific.

ABSTRACT: Long time-series studies are critical to assessing impacts of climate change on the marine carbon cycle. A 27-year time-series study in the abyssal northeast Pacific (Sta. M, 4000 m depth) has provided the first concurrent measurements of sinking particulate organic carbon supply (POC flux) and remineralization by the benthic community. Sediment community oxygen consumption (SCOC), an estimate of organic carbon remineralization, was measured in situ over daily to interannual periods with four different instruments. Daily averages of SCOC ranged from a low of 5.0 mg C m-2 day-1 in February 1991 to a high of 31.0 mg C m-2 day-1 in June 2012. POC flux estimated from sediment trap collections at 600 and 50 m above bottom ranged from 0.3 mg C m-2 day-1 in October 2013 to 32.0 mg C m-2 day-1 in

SUBMITTER: Smith KL 

PROVIDER: S-EPMC7175715 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature