DOI: 10.1029/2019GB006202
论文题名: Soil COS Exchange: A Comparison of Three European Ecosystems
作者: Kitz F. ; Spielmann F.M. ; Hammerle A. ; Kolle O. ; Migliavacca M. ; Moreno G. ; Ibrom A. ; Krasnov D. ; Noe S.M. ; Wohlfahrt G.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2020
卷: 34, 期: 4 语种: 英语
英文关键词: carbon flux
; comparative study
; grassland soil
; net ecosystem exchange
; savanna
; soil emission
; soil temperature
; soil water
; sulfide
; ultraviolet radiation
学科: carbonyl sulfide
; COS
; soil gas exchange
; soil respiration
; UV radiation
中文摘要: The potential of carbonyl sulfide (COS) flux measurements as an additional constraint for estimating the gross primary production depends, among other preconditions, on our understanding of the soil COS exchange and its contribution to the overall net ecosystem COS flux. We conducted soil chamber measurements of COS, with transparent chambers, in three different ecosystems across Europe. The in situ measurements were followed by laboratory measurements of soil samples collected at the study sites. The soil samples were exposed to UV radiation to investigate the role of photo-degradation for COS exchange. In situ and laboratory measurements revealed pronounced intersite and intrasite variability of COS exchange. In situ COS fluxes were primarily governed by radiation in the savannah-like grassland (SAV), soil temperature and intrasite heterogeneity in the deciduous broadleaf forest, and soil water content and intrasite heterogeneity in the evergreen needleleaf forest. The soil of the ecosystem with the highest light intensity incident on the soil surface, SAV, was a net source for COS, while the soils of the other two ecosystems were COS sinks. UV radiation increased COS emissions and/or reduced COS uptake from all soil samples under laboratory conditions. The impact of UV on the COS flux differed between soil samples, with a tendency toward a stronger response of the COS flux to UV radiation exposure in samples with higher soil organic matter content. Our results emphasize the importance of photo-degradation for the soil COS flux and stress the substantial spatial variability of soil COS exchange in ecosystems. ©2020. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160047
Appears in Collections: 气候变化与战略
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作者单位: Institute of Ecology, University of Innsbruck, Innsbruck, Austria; Max Planck Institute for Biogeochemistry, Jena, Germany; Forest Research Group, Universidad de Extremadura, Plasencia, Spain; Department of Environmental Engineering, Technical University of Denmark, Kongens Lyngby, Denmark; Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
Recommended Citation:
Kitz F.,Spielmann F.M.,Hammerle A.,et al. Soil COS Exchange: A Comparison of Three European Ecosystems[J]. Global Biogeochemical Cycles,2020-01-01,34(4)