Runoff and inorganic nitrogen export from Boreal Plain watersheds six years after wildfire and one year after harvest

2008 ◽  
Vol 7 (Supplement 1) ◽  
pp. 51-61 ◽  
Author(s):  
David E. Pelster ◽  
Janice M. Burke ◽  
Ellie E. Prepas
Keyword(s):  
Inorganic Nitrogen ◽  
Nitrogen Export ◽  
One Year

scholarly journals Using Geospatial Analysis and Hydrologic Modeling to Estimate Climate Change Impacts on Nitrogen Export: Case Study for a Forest and Pasture Dominated Watershed in North Carolina

2018 ◽  
Vol 7 (7) ◽  
pp. 280 ◽  
Author(s):  
Md Alam ◽  
Mehmet Ercan ◽  
Faria Zahura ◽  
Jonathan Goodall
Keyword(s):  
Climate Change ◽  
North Carolina ◽  
General Circulation ◽  
Assessment Tool ◽  
Inorganic Nitrogen ◽  
Swat Model ◽  
Climate Change Impacts ◽  
General Circulation Models ◽  
Nitrogen Loading ◽  
Nitrogen Export

Many watersheds are currently experiencing streamflow and water quality related problems that are caused by excess nitrogen. Given that weather is a major driver of nitrogen transport through watersheds, the objective of this study was to predict climate change impacts on streamflow and nitrogen export. A forest and pasture dominated watershed in North Carolina Piedmont region was used as the study area. A physically-based Soil and Water Assessment Tool (SWAT) model parameterized using geospatial data layers and spatially downscaled temperature and precipitation estimates from eight different General Circulation Models (GCMs) were used for this study. While temperature change predictions are fairly consistent across the GCMs for the study watershed, there is significant variability in precipitation change predictions across the GCMs, and this leads to uncertainty in the future conditions within the watershed. However, when the downscaled GCM projections were taken as a model ensemble, the results suggest that both high and low emission scenarios would result in an average increase in streamflow of 14.1% and 12.5%, respectively, and a decrease in the inorganic nitrogen export by 12.1% and 8.5%, respectively, by the end of the century. The results also show clear seasonal patterns with streamflow and nitrogen loading both increasing in fall and winter months by 97.8% and 50.8%, respectively, and decreasing by 20.2% and 35.5%, respectively, in spring and summer months by the end of the century.

scholarly journals In-stream net uptake regulates inorganic nitrogen export from catchments under base flow conditions

2012 ◽  
Vol 117 (G3) ◽  
pp. n/a-n/a ◽  
Author(s):  
Susana Bernal ◽  
Daniel von Schiller ◽  
Eugènia Martí ◽  
Francesc Sabater
Keyword(s):  
Inorganic Nitrogen ◽  
Base Flow ◽  
Flow Conditions ◽  
Nitrogen Export ◽  
Net Uptake

The Long-term Effects of Disturbance on Organic and Inorganic Nitrogen Export in the White Mountains, New Hampshire

Ecosystems ◽  
2000 ◽  
Vol 3 (5) ◽  
pp. 433-450 ◽  
Author(s):  
Christine L. Goodale ◽  
John D. Aber ◽  
William H. McDowell
Keyword(s):  
New Hampshire ◽  
Inorganic Nitrogen ◽  
Long Term Effects ◽  
White Mountains ◽  
Nitrogen Export

scholarly journals Seasonal nitrogen fluxes of the Lena River Delta

AMBIO ◽  
2021 ◽  
Author(s):  
Tina Sanders ◽  
Claudia Fiencke ◽  
Matthias Fuchs ◽  
Charlotte Haugk ◽  
Bennet Juhls ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Arctic Ocean ◽  
Organic Nitrogen ◽  
Inorganic Nitrogen ◽  
The Arctic ◽  
Nitrous Oxide Emissions ◽  
Sampling Station ◽  
Lena River ◽  
The Arctic Ocean ◽  
One Year

AbstractThe Arctic is nutrient limited, particularly by nitrogen, and is impacted by anthropogenic global warming which occurs approximately twice as fast compared to the global average. Arctic warming intensifies thawing of permafrost-affected soils releasing their large organic nitrogen reservoir. This organic nitrogen reaches hydrological systems, is remineralized to reactive inorganic nitrogen, and is transported to the Arctic Ocean via large rivers. We estimate the load of nitrogen supplied from terrestrial sources into the Arctic Ocean by sampling in the Lena River and its Delta. We took water samples along one of the major deltaic channels in winter and summer in 2019 and sampling station in the central delta over a one-year cycle. Additionally, we investigate the potential release of reactive nitrogen, including nitrous oxide from soils in the Delta. We found that the Lena transported nitrogen as dissolved organic nitrogen to the coastal Arctic Ocean and that eroded soils are sources of reactive inorganic nitrogen such as ammonium and nitrate. The Lena and the Deltaic region apparently are considerable sources of nitrogen to nearshore coastal zone. The potential higher availability of inorganic nitrogen might be a source to enhance nitrous oxide emissions from terrestrial and aquatic sources to the atmosphere.

Between ‘Savage Man’ and ‘Most Faithful Englishman’ Manteo and the Early Anglo-Indian Exchange, 1584–1590

Itinerario ◽  
2000 ◽  
Vol 24 (2) ◽  
pp. 146-169 ◽  
Author(s):  
Michael Leroy Oberg
Keyword(s):  
North Carolina ◽  
Chesapeake Bay ◽  
One Year ◽  
Anglo Indian

In August of 1587 Manteo, an Indian from Croatoan Island, joined a group of English settlers in an attack on the native village of Dasemunkepeuc, located on the coast of present-day North Carolina. These colonists, amongst whom Manteo lived, had landed on Roanoke Island less than a month before, dumped there by a pilot more interested in hunting Spanish prize ships than in carrying colonists to their intended place of settlement along the Chesapeake Bay. The colonists had hoped to re-establish peaceful relations with area natives, and for that reason they relied upon Manteo to act as an interpreter, broker, and intercultural diplomat. The legacy of Anglo-Indian bitterness remaining from Ralph Lane's military settlement, however, which had hastily abandoned the island one year before, was too great for Manteo to overcome. The settlers found themselves that summer in the midst of hostile Indians.

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