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URN: urn:nbn:de:swb:90-AAA1101036628

Sampling frequency affects estimates of annual nitrous oxide fluxes

Barton, L.; Wolf, B.; Rowlings, D.; Scheer, C.; Kiese, R.; Grace, P.; Stefanova, K.; Butterbach-Bahl, K.

Quantifying nitrous oxide (N$_{2}$O) fluxes, a potent greenhouse gas, from soils is necessary to improve our knowledge of terrestrial N$_{2}$O losses. Developing universal sampling frequencies for calculating annual N$_{2}$O fluxes is difficult, as fluxes are renowned for their high temporal variability. We demonstrate daily sampling was largely required to achieve annual N$_{2}$O fluxes within 10% of the ‘best’ estimate for 28 annual datasets collected from three continents—Australia, Europe and Asia. Decreasing the regularity of measurements either under- or overestimated annual N$_{2}$O fluxes, with a maximum overestimation of 935%. Measurement frequency was lowered using a sampling strategy based on environmental factors known to affect temporal variability, but still required sampling more than once a week. Consequently, uncertainty in current global terrestrial N$_{2}$O budgets associated with the upscaling of field-based datasets can be decreased significantly using adequate sampling frequencies.

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen ID: 110103662
HGF-Programm 12.02.01; LK 01
Erschienen in Scientific reports
Band 5
Seiten 15912
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