Estuarine Dissolved Organic Carbon Flux From Space: With Application to Chesapeake and Delaware Bays

Sergio R. Signorini, Antonio Mannino, Marjorie A.M. Friedrichs, Pierre St-Laurent, John Wilkin, Aboozar Tabatabai, Raymond Gabriel Najjar, Jr., Eileen E. Hofmann, Fei Da, Hanqin Tian, Yuanzhi Yao

Research output: Contribution to journalArticle

Abstract

This study uses a neural network model trained with in situ data, combined with satellite data and hydrodynamic model products, to compute the daily estuarine export of dissolved organic carbon (DOC) at the mouths of Chesapeake Bay (CB) and Delaware Bay (DB) from 2007 to 2011. Both bays show large flux variability with highest fluxes in spring and lowest in fall as well as interannual flux variability (0.18 and 0.27 Tg C/year in 2008 and 2010 for CB; 0.04 and 0.09 Tg C/year in 2008 and 2011 for DB). Based on previous estimates of total organic carbon (TOCexp) exported by all Mid-Atlantic Bight estuaries (1.2 Tg C/year), the DOC export (CB + DB) of 0.3 Tg C/year estimated here corresponds to 25% of the TOCexp. Spatial and temporal covariations of velocity and DOC concentration provide contributions to the flux, with larger spatial influence. Differences in the discharge of fresh water into the bays (74 billion m3/year for CB and 21 billion m3/year for DB) and their geomorphologies are major drivers of the differences in DOC fluxes for these two systems. Terrestrial DOC inputs are similar to the export of DOC at the bay mouths at annual and longer time scales but diverge significantly at shorter time scales (days to months). Future efforts will expand to the Mid-Atlantic Bight and Gulf of Maine, and its major rivers and estuaries, in combination with coupled terrestrial-estuarine-ocean biogeochemical models that include effects of climate change, such as warming and CO2 increase.

Original languageEnglish (US)
Pages (from-to)3755-3778
Number of pages24
JournalJournal of Geophysical Research: Oceans
Volume124
Issue number6
DOIs
StatePublished - Jun 1 2019

Fingerprint

Delaware Bay (US)
Chesapeake Bay (US)
Chesapeake Bay
carbon flux
Organic carbon
dissolved organic carbon
Fluxes
carbon
estuaries
mouth
Estuaries
Geomorphology
geomorphology
fresh water
ocean models
gulfs
neural networks
hydrodynamics
climate change
remote sensing

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

Signorini, S. R., Mannino, A., Friedrichs, M. A. M., St-Laurent, P., Wilkin, J., Tabatabai, A., ... Yao, Y. (2019). Estuarine Dissolved Organic Carbon Flux From Space: With Application to Chesapeake and Delaware Bays. Journal of Geophysical Research: Oceans, 124(6), 3755-3778. https://doi.org/10.1029/2018JC014646
Signorini, Sergio R. ; Mannino, Antonio ; Friedrichs, Marjorie A.M. ; St-Laurent, Pierre ; Wilkin, John ; Tabatabai, Aboozar ; Najjar, Jr., Raymond Gabriel ; Hofmann, Eileen E. ; Da, Fei ; Tian, Hanqin ; Yao, Yuanzhi. / Estuarine Dissolved Organic Carbon Flux From Space : With Application to Chesapeake and Delaware Bays. In: Journal of Geophysical Research: Oceans. 2019 ; Vol. 124, No. 6. pp. 3755-3778.
@article{e385c8f041f94c9bafedd64ce20054cc,
title = "Estuarine Dissolved Organic Carbon Flux From Space: With Application to Chesapeake and Delaware Bays",
abstract = "This study uses a neural network model trained with in situ data, combined with satellite data and hydrodynamic model products, to compute the daily estuarine export of dissolved organic carbon (DOC) at the mouths of Chesapeake Bay (CB) and Delaware Bay (DB) from 2007 to 2011. Both bays show large flux variability with highest fluxes in spring and lowest in fall as well as interannual flux variability (0.18 and 0.27 Tg C/year in 2008 and 2010 for CB; 0.04 and 0.09 Tg C/year in 2008 and 2011 for DB). Based on previous estimates of total organic carbon (TOCexp) exported by all Mid-Atlantic Bight estuaries (1.2 Tg C/year), the DOC export (CB + DB) of 0.3 Tg C/year estimated here corresponds to 25{\%} of the TOCexp. Spatial and temporal covariations of velocity and DOC concentration provide contributions to the flux, with larger spatial influence. Differences in the discharge of fresh water into the bays (74 billion m3/year for CB and 21 billion m3/year for DB) and their geomorphologies are major drivers of the differences in DOC fluxes for these two systems. Terrestrial DOC inputs are similar to the export of DOC at the bay mouths at annual and longer time scales but diverge significantly at shorter time scales (days to months). Future efforts will expand to the Mid-Atlantic Bight and Gulf of Maine, and its major rivers and estuaries, in combination with coupled terrestrial-estuarine-ocean biogeochemical models that include effects of climate change, such as warming and CO2 increase.",
author = "Signorini, {Sergio R.} and Antonio Mannino and Friedrichs, {Marjorie A.M.} and Pierre St-Laurent and John Wilkin and Aboozar Tabatabai and {Najjar, Jr.}, {Raymond Gabriel} and Hofmann, {Eileen E.} and Fei Da and Hanqin Tian and Yuanzhi Yao",
year = "2019",
month = "6",
day = "1",
doi = "10.1029/2018JC014646",
language = "English (US)",
volume = "124",
pages = "3755--3778",
journal = "Journal of Geophysical Research: Atmospheres",
issn = "2169-897X",
number = "6",

}

Signorini, SR, Mannino, A, Friedrichs, MAM, St-Laurent, P, Wilkin, J, Tabatabai, A, Najjar, Jr., RG, Hofmann, EE, Da, F, Tian, H & Yao, Y 2019, 'Estuarine Dissolved Organic Carbon Flux From Space: With Application to Chesapeake and Delaware Bays', Journal of Geophysical Research: Oceans, vol. 124, no. 6, pp. 3755-3778. https://doi.org/10.1029/2018JC014646

Estuarine Dissolved Organic Carbon Flux From Space : With Application to Chesapeake and Delaware Bays. / Signorini, Sergio R.; Mannino, Antonio; Friedrichs, Marjorie A.M.; St-Laurent, Pierre; Wilkin, John; Tabatabai, Aboozar; Najjar, Jr., Raymond Gabriel; Hofmann, Eileen E.; Da, Fei; Tian, Hanqin; Yao, Yuanzhi.

In: Journal of Geophysical Research: Oceans, Vol. 124, No. 6, 01.06.2019, p. 3755-3778.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Estuarine Dissolved Organic Carbon Flux From Space

T2 - With Application to Chesapeake and Delaware Bays

AU - Signorini, Sergio R.

AU - Mannino, Antonio

AU - Friedrichs, Marjorie A.M.

AU - St-Laurent, Pierre

AU - Wilkin, John

AU - Tabatabai, Aboozar

AU - Najjar, Jr., Raymond Gabriel

AU - Hofmann, Eileen E.

AU - Da, Fei

AU - Tian, Hanqin

AU - Yao, Yuanzhi

PY - 2019/6/1

Y1 - 2019/6/1

N2 - This study uses a neural network model trained with in situ data, combined with satellite data and hydrodynamic model products, to compute the daily estuarine export of dissolved organic carbon (DOC) at the mouths of Chesapeake Bay (CB) and Delaware Bay (DB) from 2007 to 2011. Both bays show large flux variability with highest fluxes in spring and lowest in fall as well as interannual flux variability (0.18 and 0.27 Tg C/year in 2008 and 2010 for CB; 0.04 and 0.09 Tg C/year in 2008 and 2011 for DB). Based on previous estimates of total organic carbon (TOCexp) exported by all Mid-Atlantic Bight estuaries (1.2 Tg C/year), the DOC export (CB + DB) of 0.3 Tg C/year estimated here corresponds to 25% of the TOCexp. Spatial and temporal covariations of velocity and DOC concentration provide contributions to the flux, with larger spatial influence. Differences in the discharge of fresh water into the bays (74 billion m3/year for CB and 21 billion m3/year for DB) and their geomorphologies are major drivers of the differences in DOC fluxes for these two systems. Terrestrial DOC inputs are similar to the export of DOC at the bay mouths at annual and longer time scales but diverge significantly at shorter time scales (days to months). Future efforts will expand to the Mid-Atlantic Bight and Gulf of Maine, and its major rivers and estuaries, in combination with coupled terrestrial-estuarine-ocean biogeochemical models that include effects of climate change, such as warming and CO2 increase.

AB - This study uses a neural network model trained with in situ data, combined with satellite data and hydrodynamic model products, to compute the daily estuarine export of dissolved organic carbon (DOC) at the mouths of Chesapeake Bay (CB) and Delaware Bay (DB) from 2007 to 2011. Both bays show large flux variability with highest fluxes in spring and lowest in fall as well as interannual flux variability (0.18 and 0.27 Tg C/year in 2008 and 2010 for CB; 0.04 and 0.09 Tg C/year in 2008 and 2011 for DB). Based on previous estimates of total organic carbon (TOCexp) exported by all Mid-Atlantic Bight estuaries (1.2 Tg C/year), the DOC export (CB + DB) of 0.3 Tg C/year estimated here corresponds to 25% of the TOCexp. Spatial and temporal covariations of velocity and DOC concentration provide contributions to the flux, with larger spatial influence. Differences in the discharge of fresh water into the bays (74 billion m3/year for CB and 21 billion m3/year for DB) and their geomorphologies are major drivers of the differences in DOC fluxes for these two systems. Terrestrial DOC inputs are similar to the export of DOC at the bay mouths at annual and longer time scales but diverge significantly at shorter time scales (days to months). Future efforts will expand to the Mid-Atlantic Bight and Gulf of Maine, and its major rivers and estuaries, in combination with coupled terrestrial-estuarine-ocean biogeochemical models that include effects of climate change, such as warming and CO2 increase.

UR - http://www.scopus.com/inward/record.url?scp=85067406629&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85067406629&partnerID=8YFLogxK

U2 - 10.1029/2018JC014646

DO - 10.1029/2018JC014646

M3 - Article

AN - SCOPUS:85067406629

VL - 124

SP - 3755

EP - 3778

JO - Journal of Geophysical Research: Atmospheres

JF - Journal of Geophysical Research: Atmospheres

SN - 2169-897X

IS - 6

ER -

Signorini SR, Mannino A, Friedrichs MAM, St-Laurent P, Wilkin J, Tabatabai A et al. Estuarine Dissolved Organic Carbon Flux From Space: With Application to Chesapeake and Delaware Bays. Journal of Geophysical Research: Oceans. 2019 Jun 1;124(6):3755-3778. https://doi.org/10.1029/2018JC014646