Mathematics – Logic
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3120509d&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 20, CiteID L20509
Mathematics
Logic
9
Hydrology: Hydrologic Budget (1655), Hydrology: Runoff And Streamflow, Hydrology: Surface Water Quality, Oceanography: Biological And Chemical: Biogeochemical Cycles (1615)
Scientific paper
Nitrogen (N) removal via benthic denitrification in large river systems can be a significant sink of terrestrial N and a source of nitrous oxide (N2O) to the atmosphere. Recent studies have demonstrated the fraction of in-stream N removed from a river reach is related to the water residence time. We used the HYDRA aquatic transport model to examine the sensitivity of in-stream N removal and the associated N2O emissions in the Mississippi River system to the interannual variability in climate. The results suggested an almost two-fold range in the percent of N removed in the Mississippi River system and a three-fold range in the associated N2O emissions, with the lowest percent removed (10-33%) and the highest N2O emissions (15.5-26.0 106 kg N) occurring in the wettest years. The results demonstrate the importance of considering climate variability and change in the management of nutrient export by large rivers.
Donner Simon D.
Kucharik Christopher J.
Oppenheimer Michael
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