Carbon Budget of Tidal Wetlands, Estuaries, and Shelf Waters of Eastern North America

R. G. Najjar, M. Herrmann, R. Alexander, E. W. Boyer, D. J. Burdige, D. Butman, W. J. Cai, E. A. Canuel, R. F. Chen, M. A.M. Friedrichs, R. A. Feagin, P. C. Griffith, A. L. Hinson, J. R. Holmquist, X. Hu, W. M. Kemp, K. D. Kroeger, A. Mannino, S. L. McCallister, W. R. McGillisM. R. Mulholland, C. H. Pilskaln, J. Salisbury, S. R. Signorini, P. St-Laurent, H. Tian, M. Tzortziou, P. Vlahos, Z. A. Wang, R. C. Zimmerman

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Carbon cycling in the coastal zone affects global carbon budgets and is critical for understanding the urgent issues of hypoxia, acidification, and tidal wetland loss. However, there are no regional carbon budgets spanning the three main ecosystems in coastal waters: tidal wetlands, estuaries, and shelf waters. Here we construct such a budget for eastern North America using historical data, empirical models, remote sensing algorithms, and process-based models. Considering the net fluxes of total carbon at the domain boundaries, 59 ± 12% (± 2 standard errors) of the carbon entering is from rivers and 41 ± 12% is from the atmosphere, while 80 ± 9% of the carbon leaving is exported to the open ocean and 20 ± 9% is buried. Net lateral carbon transfers between the three main ecosystem types are comparable to fluxes at the domain boundaries. Each ecosystem type contributes substantially to exchange with the atmosphere, with CO2 uptake split evenly between tidal wetlands and shelf waters, and estuarine CO2 outgassing offsetting half of the uptake. Similarly, burial is about equal in tidal wetlands and shelf waters, while estuaries play a smaller but still substantial role. The importance of tidal wetlands and estuaries in the overall budget is remarkable given that they, respectively, make up only 2.4 and 8.9% of the study domain area. This study shows that coastal carbon budgets should explicitly include tidal wetlands, estuaries, shelf waters, and the linkages between them; ignoring any of them may produce a biased picture of coastal carbon cycling.

Original languageEnglish (US)
Pages (from-to)389-416
Number of pages28
JournalGlobal Biogeochemical Cycles
Volume32
Issue number3
DOIs
StatePublished - Mar 2018

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carbon budget
Estuaries
Wetlands
Carbon
wetland
estuary
Water
carbon
water
Ecosystems
atmosphere
hypoxia
open ocean
Fluxes
acidification
coastal zone
North America
coastal water
Acidification
Degassing

All Science Journal Classification (ASJC) codes

  • Global and Planetary Change
  • Environmental Chemistry
  • Environmental Science(all)
  • Atmospheric Science

Cite this

Najjar, R. G. ; Herrmann, M. ; Alexander, R. ; Boyer, E. W. ; Burdige, D. J. ; Butman, D. ; Cai, W. J. ; Canuel, E. A. ; Chen, R. F. ; Friedrichs, M. A.M. ; Feagin, R. A. ; Griffith, P. C. ; Hinson, A. L. ; Holmquist, J. R. ; Hu, X. ; Kemp, W. M. ; Kroeger, K. D. ; Mannino, A. ; McCallister, S. L. ; McGillis, W. R. ; Mulholland, M. R. ; Pilskaln, C. H. ; Salisbury, J. ; Signorini, S. R. ; St-Laurent, P. ; Tian, H. ; Tzortziou, M. ; Vlahos, P. ; Wang, Z. A. ; Zimmerman, R. C. / Carbon Budget of Tidal Wetlands, Estuaries, and Shelf Waters of Eastern North America. In: Global Biogeochemical Cycles. 2018 ; Vol. 32, No. 3. pp. 389-416.
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abstract = "Carbon cycling in the coastal zone affects global carbon budgets and is critical for understanding the urgent issues of hypoxia, acidification, and tidal wetland loss. However, there are no regional carbon budgets spanning the three main ecosystems in coastal waters: tidal wetlands, estuaries, and shelf waters. Here we construct such a budget for eastern North America using historical data, empirical models, remote sensing algorithms, and process-based models. Considering the net fluxes of total carbon at the domain boundaries, 59 ± 12{\%} (± 2 standard errors) of the carbon entering is from rivers and 41 ± 12{\%} is from the atmosphere, while 80 ± 9{\%} of the carbon leaving is exported to the open ocean and 20 ± 9{\%} is buried. Net lateral carbon transfers between the three main ecosystem types are comparable to fluxes at the domain boundaries. Each ecosystem type contributes substantially to exchange with the atmosphere, with CO2 uptake split evenly between tidal wetlands and shelf waters, and estuarine CO2 outgassing offsetting half of the uptake. Similarly, burial is about equal in tidal wetlands and shelf waters, while estuaries play a smaller but still substantial role. The importance of tidal wetlands and estuaries in the overall budget is remarkable given that they, respectively, make up only 2.4 and 8.9{\%} of the study domain area. This study shows that coastal carbon budgets should explicitly include tidal wetlands, estuaries, shelf waters, and the linkages between them; ignoring any of them may produce a biased picture of coastal carbon cycling.",
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Najjar, RG, Herrmann, M, Alexander, R, Boyer, EW, Burdige, DJ, Butman, D, Cai, WJ, Canuel, EA, Chen, RF, Friedrichs, MAM, Feagin, RA, Griffith, PC, Hinson, AL, Holmquist, JR, Hu, X, Kemp, WM, Kroeger, KD, Mannino, A, McCallister, SL, McGillis, WR, Mulholland, MR, Pilskaln, CH, Salisbury, J, Signorini, SR, St-Laurent, P, Tian, H, Tzortziou, M, Vlahos, P, Wang, ZA & Zimmerman, RC 2018, 'Carbon Budget of Tidal Wetlands, Estuaries, and Shelf Waters of Eastern North America', Global Biogeochemical Cycles, vol. 32, no. 3, pp. 389-416. https://doi.org/10.1002/2017GB005790

Carbon Budget of Tidal Wetlands, Estuaries, and Shelf Waters of Eastern North America. / Najjar, R. G.; Herrmann, M.; Alexander, R.; Boyer, E. W.; Burdige, D. J.; Butman, D.; Cai, W. J.; Canuel, E. A.; Chen, R. F.; Friedrichs, M. A.M.; Feagin, R. A.; Griffith, P. C.; Hinson, A. L.; Holmquist, J. R.; Hu, X.; Kemp, W. M.; Kroeger, K. D.; Mannino, A.; McCallister, S. L.; McGillis, W. R.; Mulholland, M. R.; Pilskaln, C. H.; Salisbury, J.; Signorini, S. R.; St-Laurent, P.; Tian, H.; Tzortziou, M.; Vlahos, P.; Wang, Z. A.; Zimmerman, R. C.

In: Global Biogeochemical Cycles, Vol. 32, No. 3, 03.2018, p. 389-416.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Carbon Budget of Tidal Wetlands, Estuaries, and Shelf Waters of Eastern North America

AU - Najjar, R. G.

AU - Herrmann, M.

AU - Alexander, R.

AU - Boyer, E. W.

AU - Burdige, D. J.

AU - Butman, D.

AU - Cai, W. J.

AU - Canuel, E. A.

AU - Chen, R. F.

AU - Friedrichs, M. A.M.

AU - Feagin, R. A.

AU - Griffith, P. C.

AU - Hinson, A. L.

AU - Holmquist, J. R.

AU - Hu, X.

AU - Kemp, W. M.

AU - Kroeger, K. D.

AU - Mannino, A.

AU - McCallister, S. L.

AU - McGillis, W. R.

AU - Mulholland, M. R.

AU - Pilskaln, C. H.

AU - Salisbury, J.

AU - Signorini, S. R.

AU - St-Laurent, P.

AU - Tian, H.

AU - Tzortziou, M.

AU - Vlahos, P.

AU - Wang, Z. A.

AU - Zimmerman, R. C.

PY - 2018/3

Y1 - 2018/3

N2 - Carbon cycling in the coastal zone affects global carbon budgets and is critical for understanding the urgent issues of hypoxia, acidification, and tidal wetland loss. However, there are no regional carbon budgets spanning the three main ecosystems in coastal waters: tidal wetlands, estuaries, and shelf waters. Here we construct such a budget for eastern North America using historical data, empirical models, remote sensing algorithms, and process-based models. Considering the net fluxes of total carbon at the domain boundaries, 59 ± 12% (± 2 standard errors) of the carbon entering is from rivers and 41 ± 12% is from the atmosphere, while 80 ± 9% of the carbon leaving is exported to the open ocean and 20 ± 9% is buried. Net lateral carbon transfers between the three main ecosystem types are comparable to fluxes at the domain boundaries. Each ecosystem type contributes substantially to exchange with the atmosphere, with CO2 uptake split evenly between tidal wetlands and shelf waters, and estuarine CO2 outgassing offsetting half of the uptake. Similarly, burial is about equal in tidal wetlands and shelf waters, while estuaries play a smaller but still substantial role. The importance of tidal wetlands and estuaries in the overall budget is remarkable given that they, respectively, make up only 2.4 and 8.9% of the study domain area. This study shows that coastal carbon budgets should explicitly include tidal wetlands, estuaries, shelf waters, and the linkages between them; ignoring any of them may produce a biased picture of coastal carbon cycling.

AB - Carbon cycling in the coastal zone affects global carbon budgets and is critical for understanding the urgent issues of hypoxia, acidification, and tidal wetland loss. However, there are no regional carbon budgets spanning the three main ecosystems in coastal waters: tidal wetlands, estuaries, and shelf waters. Here we construct such a budget for eastern North America using historical data, empirical models, remote sensing algorithms, and process-based models. Considering the net fluxes of total carbon at the domain boundaries, 59 ± 12% (± 2 standard errors) of the carbon entering is from rivers and 41 ± 12% is from the atmosphere, while 80 ± 9% of the carbon leaving is exported to the open ocean and 20 ± 9% is buried. Net lateral carbon transfers between the three main ecosystem types are comparable to fluxes at the domain boundaries. Each ecosystem type contributes substantially to exchange with the atmosphere, with CO2 uptake split evenly between tidal wetlands and shelf waters, and estuarine CO2 outgassing offsetting half of the uptake. Similarly, burial is about equal in tidal wetlands and shelf waters, while estuaries play a smaller but still substantial role. The importance of tidal wetlands and estuaries in the overall budget is remarkable given that they, respectively, make up only 2.4 and 8.9% of the study domain area. This study shows that coastal carbon budgets should explicitly include tidal wetlands, estuaries, shelf waters, and the linkages between them; ignoring any of them may produce a biased picture of coastal carbon cycling.

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