Summer storms trigger soil N2O efflux episodes in forested catchments
| Autor: | N. J. Casson, Irena F. Creed, E. M. Enanga, F. D. Beall |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Atmospheric Science
Denitrification 010504 meteorology & atmospheric sciences Soil Science chemistry.chemical_element Wetland Aquatic Science Atmospheric sciences 01 natural sciences chemistry.chemical_compound Nitrate Dissolved organic carbon Precipitation 0105 earth and related environmental sciences Water Science and Technology Hydrology geography geography.geographical_feature_category Ecology Paleontology Temperate forest Biogeochemistry Forestry 04 agricultural and veterinary sciences equipment and supplies Nitrogen chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science |
| Zdroj: | Journal of Geophysical Research: Biogeosciences. 121:95-108 |
| ISSN: | 2169-8953 |
| DOI: | 10.1002/2015jg003027 |
| Popis: | Climate change and climate-driven feedbacks on catchment hydrology and biogeochemistry have the potential to alter the aquatic versus atmospheric fate of nitrogen (N) in forests. This study investigated the hypothesis that during the forest growth season, topography redistributes water and water-soluble precursors (i.e., dissolved organic carbon and nitrate) for the formation of gaseous N species. Soil nitrous oxide (N2O) and nitrogen (N2) efflux and soil physical and chemical properties were measured in a temperate forest in Central Ontario, Canada from 2005 to 2010. Hotspots and hot moments of soil N2O and N2 efflux were observed in topographic positions that accumulate precipitation, which likely triggered the formation of redox conditions and in turn intercepted the conversion of nitrate N flowing to the stream by transforming it to N2O and N2. There was a strong relationship between precipitation and N2O efflux (y = 0.44x1.22, r2 = 0.618, p |
| Databáze: | OpenAIRE |
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