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Analysis of periods with strong and coherent CO2 advection over a forested hill
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SYSNO ASEP 0348512 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Analysis of periods with strong and coherent CO2 advection over a forested hill Author(s) Zeri, M. (US)
Rebmann, C. (DE)
Feigenwinter, Ch. (BE)
Sedlák, Pavel (UFA-U) RID, ORCIDSource Title Agricultural and Forest Meteorology. - : Elsevier - ISSN 0168-1923
Roč. 150, č. 5 (2010), s. 674-683Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords Forest ecosystems ; Advection ; Net ecosystem exchange ; Carbon balance ; ADVEX Subject RIV DG - Athmosphere Sciences, Meteorology R&D Projects IAA300420803 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) UT WOS 000278244400004 DOI 10.1016/j.agrformet.2009.12.003 Annotation Horizontal and vertical advective fluxes of CO2 measured during the CarboEurope-IP advection experiment (ADVEX) at the Wetzstein spruce forest site in Thuringia, Germany, were related to wind direction, stratification regime and friction velocity u*. Measurements of wind speed and direction carried out at one of the slopes of the ridge revealed the existence of reverse flow below the canopy on the downwind side. This uphill flow occurred concurrently with the advective fluxes measured on the hill top. Another experimental evidence that suggest a link between advection at this site with the flow over the hill came from the analysis of the horizontal gradient of CO2 inside the volume formed by the ADVEX towers. It was observed that for cross-ridge flows, CO2 accumulated near the downwind side of the crest. The findings are consistent with recent model simulations of the flow and scalar transport across a low hill covered with a canopy. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2011
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