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  Analysis of periods with strong and coherent CO2 advection over a forested hill

Zeri, M., Rebmann, C., Feigenwinter, C., & Sedlake, P. (2010). Analysis of periods with strong and coherent CO2 advection over a forested hill. Agricultural and Forest Meteorology, 150(5), 674-683. doi:10.1016/j.agrformet.2009.12.003.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-000E-DB56-8 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-000E-DB57-6
Genre: Journal Article

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BGC1320.pdf (Publisher version), 3MB
 
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Zeri, M., Author
Rebmann, C.1, Author           
Feigenwinter, C., Author
Sedlake, P., Author
Affiliations:
1Department Biogeochemical Processes, Prof. E.-D. Schulze, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497751              

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Free keywords: Forest ecosystems Advection Net ecosystem exchange Carbon balance ADVEX surface-air exchange tall vegetation complex terrain carbon-dioxide water-vapor micrometeorological observations eddy covariance sensible heat rain-forest mean flow
 Abstract: 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 at the top of the hill. Such result is in agreement with recent modeling works that support the existence of advection at low hills covered with a canopy. 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 CO2 accumulated near the downwind side of the crest for cross-ridge flows, what is consistent with another modeling work of the transport of scalars across a low hill covered with a canopy. (C) 2009 Elsevier B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2010
 Publication Status: Issued
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1016/j.agrformet.2009.12.003
ISI: ://000278244400004
Other: BGC1320
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Title: Agricultural and Forest Meteorology
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 150 (5) Sequence Number: - Start / End Page: 674 - 683 Identifier: CoNE: https://pure.mpg.de/cone/journals/resource/954928468040
ISSN: 0168-1923