Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin

Craig A Carlson; Dennis A Hansell; Norman B Nelson; David A Siegel; William M Smethie; Samar Khatiwala; Meredith M Meyers; Elisa Halewood

doi:10.1016/j.dsr2.2010.02.013

Journal article

Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin

Craig A Carlson, Dennis A Hansell, Norman B Nelson, David A Siegel, William M Smethie, Samar Khatiwala, Meredith M Meyers and Elisa Halewood

Deep-sea research. Part II, Topical studies in oceanography, Vol.57(16), pp.1433-1445

2010

DOI: https://doi.org/10.1016/j.dsr2.2010.02.013

Abstract

CFC

DOC

NADW

Carbon export

AOU

Dissolved organic carbon (DOC) data are presented from three meridional transects conducted in the North Atlantic as part of the US Climate Variability (CLIVAR) Repeat Hydrography program in 2003. The hydrographic sections covered a latitudinal range of 6°S to 63°N along longitudes 20°W (CLIVAR line A16), 52°W (A20) and 66°W (A22). Over 3700 individual measurements reveal unprecedented detail in the DOC distribution and systematic variations in the mesopelagic and bathypelagic zones of the North Atlantic basin. Latitudinal gradients in DOC concentrations combined with published estimates of ventilation rates for the main thermocline and North Atlantic Deep Water (NADW) indicate a net DOC export rate of 0.081 Pg C yr −1 from the epipelagic zone into the mesopelagic and bathypelagic zones. Model II regression and multiple linear regression models applied to pairwise measures of DOC and chlorofluorocarbon (CFC-12) ventilation age, retrieved from major water masses within the main thermocline and NADW, indicate decay rates for exported DOC ranging from 0.13 to 0.94 μmol kg −1 yr −1, with higher DOC concentrations driving higher rates. The contribution of DOC oxidation to oxygen consumption ranged from 5 to 29% while mineralization of sinking biogenic particles drove the balance of the apparent oxygen utilization.

Metrics

17 Record Views

203 Times Cited - Web of Science

See more details

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.2 Marine Biology; 3.2.154 Phytoplankton
Web Of Science research areas: Oceanography
ESI research areas: Geosciences

UN Sustainable Development Goals (SDGs)

This output has contributed to the advancement of the following goals:

Source: InCites

Details

Title: Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin
Creators: Craig A Carlson - Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106
Dennis A Hansell - Rosenstiel School of Marine and Atmospheric Science, University of Miami, Florida, 33149
Norman B Nelson - Institute for Computational Earth System Science, Mail Code 3060, University of California, Santa Barbara, CA 93106
David A Siegel - Institute for Computational Earth System Science, Mail Code 3060, University of California, Santa Barbara, CA 93106
William M Smethie - Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY
Samar Khatiwala - Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY
Meredith M Meyers - Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106
Elisa Halewood - Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106
Publication Details: Deep-sea research. Part II, Topical studies in oceanography, Vol.57(16), pp.1433-1445
Publisher: Elsevier Ltd
Academic Unit: Leadership Department; Rosenstiel School; Rosenstiel - Ocean Sciences
Language: English
Resource Type: Journal article
Record Identifier: 991031559285902976