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Verlagsausgabe
DOI: 10.5445/IR/1000068753
Veröffentlicht am 18.01.2018
Originalveröffentlichung
DOI: 10.1002/2016JG003667
Scopus
Zitationen: 8
Web of Science
Zitationen: 7

Spatial variability of soil N₂O and CO₂ fluxes in different topographic positions in a tropical montane forest in Kenya

Arias-Navarro, C.; Díaz-Pinés, E.; Klatt, S.; Brandt, P.; Rufino, M. C.; Butterbach-Bahl, K.; Verchot, L. V.

Abstract:
Quantifying and understanding the small-scale variability of nitrous oxide (N₂O) and carbon dioxide (CO₂) emission are essential for reporting accurate ecosystem greenhouse gas budgets. The objective of this study was to evaluate the spatial pattern of soil CO₂ and N₂O emissions and their relation to topography in a tropical montane forest. We measured fluxes of N₂O and CO₂ from 810 sampling locations across valley bottom, midslope, and ridgetop positions under controlled laboratory conditions. We further calculated the minimum number of samples necessary to provide best estimates of soil N₂O and CO₂ fluxes at the plot level. Topography exhibited a major influence on N₂O emissions, with soils at midslope position emitting significantly less than at ridgetops and valley bottoms, but no consistent effect of topography on soil CO₂ emissions was found. The high spatial variation of N₂O and CO₂ fluxes was further increased by changes in vegetation and soil properties resulting from human disturbance associated with charcoal production. Soil N₂O and CO₂ fluxes showed no spatial pattern at the plot level, with “hot spots” strongly contribu ... mehr


Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 0148-0227, 2156-2202, 2169-8953, 2169-8961
URN: urn:nbn:de:swb:90-687537
KITopen ID: 1000068753
HGF-Programm 12.02.01; LK 01
Erschienen in Journal of geophysical research / Biogeosciences
Band 122
Heft 3
Seiten 514-527
Schlagworte tropical forest, topography, spatial variability, nitrous oxide, carbon dioxide, hot sports
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