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Comparing CO2 storage and advection conditions at night at different carboeuroflux sites
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SYSNO ASEP 0030366 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Comparing CO2 storage and advection conditions at night at different carboeuroflux sites Title Rozdíly v ukládání CO2 za různých advekčních podmínek v průběhu noci na experimentálních ekologických pracovištích sítě CARBOEUROFLUX Author(s) Aubinet, M. (BE)
Berbigier, P. (BE)
Bernhofer, Ch. (FR)
Cescatti, A. (DE)
Feigenwinter, C. (IT)
Granier, A. (CH)
Grunwald, TH (FR)
Havránková, Kateřina (UEK-B) RID, SAI
Heinesch, B. (IT)
Longdoz, B. (IT)
Marcolla, B. (IT)
Montagnani, L. (IT)
Sedlák, Pavel (UEK-B) RID, ORCID, SAISource Title Boundary Layer Meteorology - ISSN 0006-8314
Roč. 116, č. 1 (2005), s. 63-94Number of pages 31 s. Language eng - English Country GB - United Kingdom Keywords advection ; CO2 storage ; forest ecosystems Subject RIV GK - Forestry CEZ AV0Z60870520 - UEK-B (2005-2011) Annotation Anemometer and CO2 concentration data from temporary campaigns performed at six CARBOEUROFLUX forest sites were used to estimate the importance of non-turbulent fluxes in nighttime conditions.While storage was observed to be significant only during periods of both low turbulence and low advection,the advective fluxes strongly influence the nocturnal CO2 balance.On the basis of the main factors determining the onset of advective fluxes,the advection velocity, which takes net radiation and local topography into account, was introduced as a criterion to characterise the conditions of storage enrichment/depletion.In particular,all sites where advection occurs show the onset of a boundary layer characterised by a downslope flow, negative vertical velocities and negative CO2 concentration gradients during nighttime. As a conseguence, vertical advection was observed to be positive at all sites, which corresponds to a removal of CO2 from the ecosystem. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2006
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