Raymond Najjar

Affiliate Researcher
Titles and Affiliations
Professor, Meteorology and Atmospheric Science

Research Summary

I conduct research on a variety of topics in oceanography, climate science, and hydrology, with current interests focused on how coastal waters are influenced by climate change and pollution. 

In the News

Research Keywords

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Projects

Recent Publications

A Synthesis of Global Coastal Ocean Greenhouse Gas Fluxes

Resplandy, L., Hogikyan, A., Müller, J. D., Najjar, R. G., Bange, H. W., Bianchi, D., Weber, T., Cai, W. J., Doney, S. C., Fennel, K., Gehlen, M., Hauck, J., Lacroix, F., Landschützer, P., Le Quéré, C., Roobaert, A., Schwinger, J., Berthet, S., Bopp, L., Chau, T. T. T., & 15 othersDai, M., Gruber, N., Ilyina, T., Kock, A., Manizza, M., Lachkar, Z., Laruelle, G. G., Liao, E., Lima, I. D., Nissen, C., Rödenbeck, C., Séférian, R., Toyama, K., Tsujino, H. & Regnier, P., Jan 2024, In: Global Biogeochemical Cycles. 38, 1, e2023GB007803.

Research output: Contribution to journalArticlepeer-review

Impacts and uncertainties of climate-induced changes in watershed inputs on estuarine hypoxia

Hinson, K. E., Friedrichs, M. A. M., Najjar, R. G., Herrmann, M., Bian, Z., Bhatt, G., St-Laurent, P., Tian, H. & Shenk, G., May 26 2023, In: Biogeosciences. 20, 10, p. 1937-1961 25 p.

Research output: Contribution to journalArticlepeer-review

Coastal vegetation and estuaries are collectively a greenhouse gas sink

Rosentreter, J. A., Laruelle, G. G., Bange, H. W., Bianchi, T. S., Busecke, J. J. M., Cai, W. J., Eyre, B. D., Forbrich, I., Kwon, E. Y., Maavara, T., Moosdorf, N., Najjar, R. G., Sarma, V. V. S. S., Van Dam, B. & Regnier, P., Jun 2023, In: Nature Climate Change. 13, 6, p. 579-587 9 p.

Research output: Contribution to journalArticlepeer-review

Decoupling of Estuarine Hypoxia and Acidification as Revealed by Historical Water Quality Data

Shen, C., Testa, J. M., Herrmann, M. & Najjar, R. G., Jan 10 2023, In: Environmental Science and Technology. 57, 1, p. 780-789 10 p.

Research output: Contribution to journalArticlepeer-review

Increased Terrestrial Carbon Export and CO2 Evasion From Global Inland Waters Since the Preindustrial Era

Tian, H., Yao, Y., Li, Y., Shi, H., Pan, S., Najjar, R. G., Pan, N., Bian, Z., Ciais, P., Cai, W. J., Dai, M., Friedrichs, M. A. M., Li, H. Y., Lohrenz, S. & Leung, L. R., Oct 2023, In: Global Biogeochemical Cycles. 37, 10, e2023GB007776.

Research output: Contribution to journalArticlepeer-review

Extent and Causes of Chesapeake Bay Warming

Hinson, K. E., Friedrichs, M. A. M., St-Laurent, P., Da, F. & Najjar, R. G., Dec 2022, In: Journal of the American Water Resources Association. 58, 6, p. 805-825 21 p.

Research output: Contribution to journalArticlepeer-review

The land-to-ocean loops of the global carbon cycle

Regnier, P., Resplandy, L., Najjar, R. G. & Ciais, P., Mar 17 2022, In: Nature. 603, 7901, p. 401-410 10 p.

Research output: Contribution to journalReview articlepeer-review

Estimating estuarine primary production using satellite data and machine learning

Xu, M., Hu, C., Najjar, R. G., Herrmann, M., Briceno, H., Barnes, B. B., Roger Johansson, J. O. & English, D., Jun 2022, In: International Journal of Applied Earth Observation and Geoinformation. 110, 102821.

Research output: Contribution to journalArticlepeer-review

Mechanisms Driving Decadal Changes in the Carbonate System of a Coastal Plain Estuary

Da, F., Friedrichs, M. A. M., St-Laurent, P., Shadwick, E. H., Najjar, R. G. & Hinson, K. E., Jun 2021, In: Journal of Geophysical Research: Oceans. 126, 6, e2021JC017239.

Research output: Contribution to journalArticlepeer-review

Triple oxygen isotope constraints on atmospheric O2and biological productivity during the mid-Proterozoic

Liu, P., Liu, J., Ji, A., Reinhard, C. T., Planavsky, N. J., Babikov, D., Najjar, R. G. & Kasting, J. F., Dec 21 2021, In: Proceedings of the National Academy of Sciences of the United States of America. 118, 51, e2105074118.

Research output: Contribution to journalArticlepeer-review

Estuaries as Filters for Riverine Microplastics: Simulations in a Large, Coastal-Plain Estuary

López, A. G., Najjar, R. G., Friedrichs, M. A. M., Hickner, M. A. & Wardrop, D. H., Aug 26 2021, In: Frontiers in Marine Science. 8, 715924.

Research output: Contribution to journalArticlepeer-review

Impacts of Multiple Environmental Changes on Long-Term Nitrogen Loading From the Chesapeake Bay Watershed

Pan, S., Bian, Z., Tian, H., Yao, Y., Najjar, R. G., Friedrichs, M. A. M., Hofmann, E. E., Xu, R. & Zhang, B., May 2021, In: Journal of Geophysical Research: Biogeosciences. 126, 5, e2020JG005826.

Research output: Contribution to journalArticlepeer-review

A Metamodel-Based Analysis of the Sensitivity and Uncertainty of the Response of Chesapeake Bay Salinity and Circulation to Projected Climate Change

Ross, A. C., Najjar, R. G. & Li, M., Jan 2021, In: Estuaries and Coasts. 44, 1, p. 70-87 18 p.

Research output: Contribution to journalArticlepeer-review

Correction to: A Metamodel-Based Analysis of the Sensitivity and Uncertainty of the Response of Chesapeake Bay Salinity and Circulation to Projected Climate Change (Estuaries and Coasts, (2021), 44, 1, (70-87), 10.1007/s12237-020-00761-w)

Ross, A. C., Najjar, R. G. & Li, M., Jul 2021, In: Estuaries and Coasts. 44, 5, p. 1492 1 p.

Research output: Contribution to journalComment/debatepeer-review

Riverine Carbon Cycling Over the Past Century in the Mid-Atlantic Region of the United States

Yao, Y., Tian, H., Pan, S., Najjar, R. G., Friedrichs, M. A. M., Bian, Z., Li, H. Y. & Hofmann, E. E., May 2021, In: Journal of Geophysical Research: Biogeosciences. 126, 5, e2020JG005968.

Research output: Contribution to journalArticlepeer-review