The influence of climate on in‐stream removal of nitrogen
- 30 October 2004
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 31 (20)
- https://doi.org/10.1029/2004gl020477
Abstract
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.This publication has 16 references indexed in Scilit:
- Impact of changing land use practices on nitrate export by the Mississippi RiverGlobal Biogeochemical Cycles, 2004
- Evaluating the impacts of land management and climate variability on crop production and nitrate export across the Upper Mississippi BasinGlobal Biogeochemical Cycles, 2003
- Modeling the impact of hydrological changes on nitrate transport in the Mississippi River Basin from 1955 to 1994Global Biogeochemical Cycles, 2002
- Increasing risk of great floods in a changing climateNature, 2002
- Long‐term changes in concentrations and flux of nitrogen in the Mississippi River Basin, USAHydrological Processes, 2001
- Control of Nitrogen Export from Watersheds by Headwater StreamsScience, 2001
- Testing the performance of a dynamic global ecosystem model: Water balance, carbon balance, and vegetation structureGlobal Biogeochemical Cycles, 2000
- Nitrous oxide production in riparian zones and its importance to national emission inventoriesChemosphere - Global Change Science, 2000
- Global distribution of nitrous oxide production and N inputs in freshwater and coastal marine ecosystemsGlobal Biogeochemical Cycles, 1998
- Regional nitrogen budgets and riverine N & P fluxes for the drainages to the North Atlantic Ocean: Natural and human influencesBiogeochemistry, 1996