Canopy Chamber: a useful tool to monitor the CO2 exchange dynamics of shrubland

0475294 - ÚVGZ 2018 RIV IT eng J - Článek v odborném periodiku
Guidolotti, G. - De Dato, G. - Liberati, D. - De Angelis, Paolo
Canopy Chamber: a useful tool to monitor the CO2 exchange dynamics of shrubland.
iForest – Biogeosciences and Forestry. Roč. 10, JUN (2017), s. 597-604. ISSN 1971-7458. E-ISSN 1971-7458
Institucionální podpora: RVO:67179843
Klíčová slova: Canopy chamber * Cistus monspeliensis * CO2 fluxes * Mediterranean garrigue * Semiarid ecosystems * Shrubland
Obor OECD: Forestry
Impakt faktor: 1.246, rok: 2017

A transient state canopy-chamber was developed to monitor CO2 exchange of shrubland ecosystems. The chamber covered 0.64 m2 and it was modular with a variable height. Several tests were carried out to check the potential errors in the flux estimates due to leakages and the environment modifications during the measurements inside the chamber. The laboratory leakages test showed an error below 1% of the flux, the temperature increases inside the chamber were below 1.3 °C at different light intensity and small pressure changes. The radial blowers inside the chamber created different wind speed at different chamber height, with faster speed at the top of the chamber and the minimum wind speed that was recorded at soil level, preventing detectable effects on soil CO2 emission rates. Moreover, the chamber was tested for two years in a semi-arid Mediterranean garrigue, identifying a strong seasonality of CO2 fluxes with the highest rates during spring and lowest rates recorded during the hot dry non-vegetative summer.
Trvalý link: http://hdl.handle.net/11104/0272132