Articles | Volume 13, issue 11
https://doi.org/10.5194/bg-13-3441-2016
https://doi.org/10.5194/bg-13-3441-2016
Research article
 | 
15 Jun 2016
Research article |  | 15 Jun 2016

Accurate and precise quantification of atmospheric nitrate in streams draining land of various uses by using triple oxygen isotopes as tracers

Urumu Tsunogai, Takanori Miyauchi, Takuya Ohyama, Daisuke D. Komatsu, Fumiko Nakagawa, Yusuke Obata, Keiichi Sato, and Tsuyoshi Ohizumi

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Cited articles

Alexander, B., Hastings, M. G., Allman, D. J., Dachs, J., Thornton, J. A., and Kunasek, S. A.: Quantifying atmospheric nitrate formation pathways based on a global model of the oxygen isotopic composition (Δ17O) of atmospheric nitrate, Atmos. Chem. Phys., 9, 5043–5056, https://doi.org/10.5194/acp-9-5043-2009, 2009.
Aravena, R., Evans, M. L., and Cherry, J. A.: Stable Isotopes of Oxygen and Nitrogen in Source Identification of Nitrate from Septic Systems, Groundwater, 31, 180–186, 1993.
Barnes, R. and Raymond, P. A.: Land-use controls on sources and processing of nitrate in small watersheds: insights from dual isotopic analysis, Ecol. Appl., 20, 1961–1978, 2010.
Barnes, R., Raymond, P., and Casciotti, K.: Dual isotope analyses indicate efficient processing of atmospheric nitrate by forested watersheds in the northeastern US, Biogeochemistry, 90, 15–27, 2008.
Böttcher, J., Strebel, O., Voerkelius, S., and Schmidt, H. L.: Using Isotope Fractionation of Nitrate Nitrogen and Nitrate Oxygen for Evaluation of Microbial Denitrification in a Sandy Aquifer, J. Hydrol., 114, 413–424, 1990.
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Short summary
We quantified the influence of changes in land use and population density between each catchment area on the fate of atmospheric nitrate, by determining the areal distribution and seasonal variation in stable isotopic compositions of nitrate for more than 30 streams within a same watershed. We found that the absolute concentrations of atmospheric nitrate were almost the same between the streams irrespective to the changes in land use and population density.
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