About: Direct advection measurements do not help to solve the night-time CO2 closure problem: Evidence from three different forests

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About: Direct advection measurements do not help to solve the night-time CO2 closure problem: Evidence from three different forests Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The ADVEX project involved extensive advection measurements at three sites differing in topography. One aim of the project was to measure the CO2 balance in night-time conditions, in an attempt to improve NEE estimates. Horizontal advection varied greatly from site to site and from one wind sector to another, with the highest values reached at large friction velocities. The night-time NEE estimates deduced from the mass balance were incompatible with biologically driven fluxes because they varied strongly from one wind sector to another, their order of magnitude was not realistic and they still showed a trend vs. friction velocity. From a critical analysis of the measurement and data treatment we concluded that the causes of the problem are related to the measurement representativeness or the simplified CO2 mass balance equation used. This suggests that the improvement of eddy flux measurements by developing an advection-completed CO2 mass balance at night would be practically difficult. The ADVEX project involved extensive advection measurements at three sites differing in topography. One aim of the project was to measure the CO2 balance in night-time conditions, in an attempt to improve NEE estimates. Horizontal advection varied greatly from site to site and from one wind sector to another, with the highest values reached at large friction velocities. The night-time NEE estimates deduced from the mass balance were incompatible with biologically driven fluxes because they varied strongly from one wind sector to another, their order of magnitude was not realistic and they still showed a trend vs. friction velocity. From a critical analysis of the measurement and data treatment we concluded that the causes of the problem are related to the measurement representativeness or the simplified CO2 mass balance equation used. This suggests that the improvement of eddy flux measurements by developing an advection-completed CO2 mass balance at night would be practically difficult. (en)
Title	Direct advection measurements do not help to solve the night-time CO2 closure problem: Evidence from three different forests Direct advection measurements do not help to solve the night-time CO2 closure problem: Evidence from three different forests (en)
skos:prefLabel	Direct advection measurements do not help to solve the night-time CO2 closure problem: Evidence from three different forests Direct advection measurements do not help to solve the night-time CO2 closure problem: Evidence from three different forests (en)
skos:notation	RIV/68378289:_____/10:00348597!RIV11-AV0-68378289
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(IAA300420803), Z(AV0Z30420517)
http://linked.open...iv/cisloPeriodika	5
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Sedlák, Pavel
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky atmosféry AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	254532
http://linked.open...ai/riv/idVysledku	RIV/68378289:_____/10:00348597
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Advection; Forests; CO2 fluxes; Eddy covariance (en)
http://linked.open.../riv/klicoveSlovo	Forests CO2 fluxes Eddy covariance Advection
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[F411C90697D4]
http://linked.open...i/riv/nazevZdroje	Agricultural and Forest Meteorology
http://linked.open...in/vavai/riv/obor	DG
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	10 (xsd:int)
http://linked.open...vavai/riv/projekt	Missing CO2 flux in night-time eddy covariance measurements
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	150
http://linked.open...iv/tvurceVysledku	Sedlák, Pavel Lindroth, A. Montagnani, L. Rebmann, C. Aubinet, M. Bernhofer, C. Canepa, E. Feigenwinter, C. Heinesch, B. Van Gorsel, E.
http://linked.open...ain/vavai/riv/wos	000278244400002
http://linked.open...n/vavai/riv/zamer	Studium atmosférického obalu Země v interakci s pozemskými a kosmickými vlivy
issn	0168-1923
number of pages	10 (xsd:int)
is http://linked.open...avai/riv/vysledek of	Direct advection measurements do not help to solve the night-time CO2 closure problem: Evidence from three different forests Direct advection measurements do not help to solve the night-time CO2 closure problem: Evidence from three different forests Direct advection measurements do not help to solve the night-time CO2 closure problem: Evidence from three different forests

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