Comparison of eddy covariance and bowen ratio energy balance method: energy balance closure versus bowen ratio similarity assumption

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of eddy covariance and bowen ratio energy balance method: energy balance closure versus bowen ratio similarity assumption

Popis výsledku v původním jazyce

The Bowen ratio and the Monin-Obukhov similarity principles are based on the assumption that the eddy diffusivities for temperature and humidity are equal to each other under all atmospheric stratifications within turbulent surface boundary layer. However, several authors reported that this equality was violated under advective inversion or during the non-stationary conditions due to clouds passing by and sudden change of wind speed and direction. The inequality of the eddy diffusivity can lead to errors in the energy partitioning estimates by gradient techniques like the Bowen ratio energy balance (BREB) and the aerodynamical method, or methods based on residual energy balance such as the Penman-Monteith or Priestley-Taylor models. This study investigates two seasons of simultaneous measurement by eddy covariance (EC) and BREB above a high density poplar plantation at the Domaninek locality. The direct measurement of eddy diffusivities by EC is reinvestigating the validity of the long

Název v anglickém jazyce

Comparison of eddy covariance and bowen ratio energy balance method: energy balance closure versus bowen ratio similarity assumption

Popis výsledku anglicky

The Bowen ratio and the Monin-Obukhov similarity principles are based on the assumption that the eddy diffusivities for temperature and humidity are equal to each other under all atmospheric stratifications within turbulent surface boundary layer. However, several authors reported that this equality was violated under advective inversion or during the non-stationary conditions due to clouds passing by and sudden change of wind speed and direction. The inequality of the eddy diffusivity can lead to errors in the energy partitioning estimates by gradient techniques like the Bowen ratio energy balance (BREB) and the aerodynamical method, or methods based on residual energy balance such as the Penman-Monteith or Priestley-Taylor models. This study investigates two seasons of simultaneous measurement by eddy covariance (EC) and BREB above a high density poplar plantation at the Domaninek locality. The direct measurement of eddy diffusivities by EC is reinvestigating the validity of the long

Druh

D - Stať ve sborníku

CEP obor

DG - Vědy o atmosféře, meteorologie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Global Change and Resilience

ISBN

978-80-904351-9-3

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

147-151

Název nakladatele

Global Change Research Centre, AS CR, v. v. i.

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

22. 5. 2013

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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