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Browsing College of Forestry, Wildlife and Environment by Author "Najjar, Raymond"

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Anthropogenic and climatic influences on carbon fluxes from eastern North America to the Atlantic Ocean: A process-based modeling study 

Tian, Hanqin; Yang, Qichun; Najjar, Raymond; Ren, Wei; Friedrichs, Marjorie; Hopkinson, Charles; Pan, Shufen; 0000-0002-1806-4091; 0000-0002-4840-4835; 0000-0003-2828-7595; 0000-0002-8689-2550; 0000-0001-7920-1427; 0000-0002-7331-8322 (2026-02-05)
The magnitude, spatiotemporal patterns, and controls of carbon flux from land to the ocean remain uncertain. Here we applied a process-based land model with explicit representation of carbon processes in streams and rivers ...

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

Pan, Shufen; Bian, Zihao; Tian, Hanqin; Yao, Yuanzhi; Najjar, Raymond; Friedrichs, Marjorie; Hofmann, Eileen; Xu, Rongting; Zhang, Bowen; 0000-0002-1806-4091; 0000-0003-2828-7595; 0000-0002-8370-0509; 0000-0001-7292-9271; 0000-0003-2387-4598; 0000-0001-6710-4371 (2026-01-30)
Excessive nutrient inputs from land, particularly nitrogen (N), have been found to increase the occurrence of hypoxia and harmful algal blooms in coastal ecosystems. To identify the main contributors of increased N loading ...

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

Yao, Yuanzhi; Tian, Hanqin; Pan, Shufen; Najjar, Raymond; Friedrichs, Marjorie; Bian, Zihao; Li, Hong-Yi; Hofmann, Eileen; 0000-0002-9807-3851; 0000-0002-1806-4091; 0000-0003-2828-7595; 0000-0001-6710-4371; 0000-0003-2387-4598 (2026-02-05)
The lateral transport and degassing of carbon in riverine ecosystems is difficult to quantify on large spatial and long temporal scales due to the relatively poor representation of carbon processes in many models. Here, ...