Wind characteristics of CzeCOS’s ecosystem station Bílý Kříž

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F17%3A00485381" target="_blank" >RIV/86652079:_____/17:00485381 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Wind characteristics of CzeCOS’s ecosystem station Bílý Kříž

Popis výsledku v původním jazyce

Eddy-covariance is a direct and accurate method to measure exchanges of greenhousengases and energy between ecosystems and the atmosphere under good turbulent mixingnconditions. Calm conditions can affect the accuracy of the eddy-covariance measurementsnby potential gas buildup below the measurement height. This study characterizes windnpatterns and calm periods at Bílý Kříž Ecosystem Research Station, using four-year (2010-n2013) wind data measured on an eddy-covariance tower at the site, located in BeskidsnMountains, Czech Republic. The site is covered by young, dense Norway spruce forestnon a 12.5o slope facing South. The results show that the prevailing wind direction wasnfrom S to SW direction (55 % frequency of occurrence), and to a much lesser extent fromnN, NE and NW but including the strongest winds above 12 m s-1, possibly during galenor storm events. Calm condition (u < 1 m s-1) accounted for 34 % of year time. Summernand Spring were the calmest seasons. Occurrence frequencies of calm conditions for thensix-month periods from May to October (plant growing season) were higher than thosenfor the remaining parts of the year (on average 39 % vs 28 % respectively). One should benaware of the calm periods in May-October when processing eddy-covariance data, sincenit is the time period of most contribution of forest ecosystem as a sink of CO2.

Název v anglickém jazyce

Wind characteristics of CzeCOS’s ecosystem station Bílý Kříž

Popis výsledku anglicky

Eddy-covariance is a direct and accurate method to measure exchanges of greenhousengases and energy between ecosystems and the atmosphere under good turbulent mixingnconditions. Calm conditions can affect the accuracy of the eddy-covariance measurementsnby potential gas buildup below the measurement height. This study characterizes windnpatterns and calm periods at Bílý Kříž Ecosystem Research Station, using four-year (2010-n2013) wind data measured on an eddy-covariance tower at the site, located in BeskidsnMountains, Czech Republic. The site is covered by young, dense Norway spruce forestnon a 12.5o slope facing South. The results show that the prevailing wind direction wasnfrom S to SW direction (55 % frequency of occurrence), and to a much lesser extent fromnN, NE and NW but including the strongest winds above 12 m s-1, possibly during galenor storm events. Calm condition (u < 1 m s-1) accounted for 34 % of year time. Summernand Spring were the calmest seasons. Occurrence frequencies of calm conditions for thensix-month periods from May to October (plant growing season) were higher than thosenfor the remaining parts of the year (on average 39 % vs 28 % respectively). One should benaware of the calm periods in May-October when processing eddy-covariance data, sincenit is the time period of most contribution of forest ecosystem as a sink of CO2.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/LO1415" target="_blank" >LO1415: CzechGlobe 2020 - Rozvoj Centra pro studium dopadů globální změny klimatu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Beskydy

ISSN

1803-2451

e-ISSN

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Svazek periodika

10

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

8

Strana od-do

33-40

Kód UT WoS článku

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EID výsledku v databázi Scopus

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