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Cold season soil NO fluxes from a temperate forest : Drivers and contribution to annual budgets

Medinets, S. 1; Gasche, R. 1; Skiba, U.; Schindlbacher, A.; Kiese, R. 1; Butterbach-Bahl, K. 1
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)


Soils, and here specifically acidic forest soils exposed to high rates of atmospheric nitrogen deposition, are a significant source for the secondary greenhouse gas nitric oxide (NO). However, as flux estimates are mainly based on measurements during the vegetation period, annual NO emissions budgets may hold uncertainty as cold season soil NO fluxes have rarely been quantified. Here we analyzed cold season soil NO fluxes and potential environmental drivers on the basis of the most extensive database on forest soil NO fluxes obtained at the Höglwald Forest, Germany, spanning the years 1994 to 2010. On average, the cold season (daily average air temperature <3 °C) contributed to 22% of the annual soil NO budget, varying from 13% to 41% between individual cold seasons. Temperature was the main controlling factor of the cold season NO fluxes, whereas during freeze-thaw cycles soil moisture availability determined NO emission rates. The importance of cold season soil NO fluxes for annual NO fluxes depended positively on the length of the cold season, but responded negatively to frost events. Snow cover did not significantly affect cold season soil NO fluxes. ... mehr

Volltext §
DOI: 10.5445/IR/1000065339
DOI: 10.1088/1748-9326/11/11/114012
Zitationen: 19
Web of Science
Zitationen: 17
Zitationen: 17
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 1748-9318, 1748-9326
KITopen-ID: 1000065339
HGF-Programm 12.02.01 (POF III, LK 01) Effects of land use and climate change
Erschienen in Environmental research letters
Verlag Institute of Physics Publishing Ltd (IOP Publishing Ltd)
Band 11
Heft 11
Seiten 114012
Schlagwörter nitric oxide, N₂O, CO₂, freeze-thaw, snow
Nachgewiesen in Dimensions
Web of Science
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