Dissolved organic carbon fluxes in the Middle Atlantic Bight: An integrated approach based on satellite data and ocean model products

Antonio Mannino, Sergio R. Signorini, Michael G. Novak, John Wilkin, Marjorie A.M. Friedrichs, Raymond G. Najjar

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Continental margins play an important role in global carbon cycle, accounting for 15-21% of the global marine primary production. Since carbon fluxes across continental margins from land to the open ocean are not well constrained, we undertook a study to develop satellite algorithms to retrieve dissolved organic carbon (DOC) and combined these satellite data with physical circulation model products to quantify the shelf boundary fluxes of DOC for the U.S. Middle Atlantic Bight (MAB). Satellite DOC was computed through seasonal relationships of DOC with colored dissolved organic matter absorption coefficients, which were derived from an extensive set of in situ measurements. The multiyear time series of satellite-derived DOC stocks (4.9 Teragrams C; Tg) shows that freshwater discharge influences the magnitude and seasonal variability of DOC on the continental shelf. For the 2010-2012 period studied, the average total estuarine export of DOC into the MAB shelf is 0.77 Tg C yr-1 (year). The integrated DOC tracer fluxes across the shelf boundaries are 12.1 Tg C yr-1 entering the MAB from the southwest alongshore boundary, 18.5 Tg C yr-1 entering the MAB from the northeast alongshore boundary, and 29.0 Tg C yr-1 flowing out of the MAB across the entire length of the 100 m isobath. The magnitude of the cross-shelf DOC flux is quite variable in time (monthly) and space (north to south). The highly dynamic exchange of water along the shelf boundaries regulates the DOC budget of the MAB at subseasonal time scales.

Original languageEnglish (US)
Pages (from-to)312-336
Number of pages25
JournalJournal of Geophysical Research: Biogeosciences
Volume121
Issue number2
DOIs
StatePublished - Feb 2016

Fingerprint

ocean models
carbon flux
Organic carbon
dissolved organic carbon
integrated approach
remote sensing
satellite data
oceans
Satellites
Fluxes
carbon
ocean
products
shelves
continental shelves
continental margin
Carbon
product
dissolved organic matter
carbon cycle

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Mannino, Antonio ; Signorini, Sergio R. ; Novak, Michael G. ; Wilkin, John ; Friedrichs, Marjorie A.M. ; Najjar, Raymond G. / Dissolved organic carbon fluxes in the Middle Atlantic Bight : An integrated approach based on satellite data and ocean model products. In: Journal of Geophysical Research: Biogeosciences. 2016 ; Vol. 121, No. 2. pp. 312-336.
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Dissolved organic carbon fluxes in the Middle Atlantic Bight : An integrated approach based on satellite data and ocean model products. / Mannino, Antonio; Signorini, Sergio R.; Novak, Michael G.; Wilkin, John; Friedrichs, Marjorie A.M.; Najjar, Raymond G.

In: Journal of Geophysical Research: Biogeosciences, Vol. 121, No. 2, 02.2016, p. 312-336.

Research output: Contribution to journalArticle

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