Forest ecosystem as a source of CO2 during growing season: relation to weather conditions

0430197 - ÚVGZ 2015 RIV PL eng J - Článek v odborném periodiku
Taufarová, Klára - Havránková, Kateřina - Dvorská, Alice - Pavelka, Marian - Urbaniak, M. - Janouš, Dalibor
Forest ecosystem as a source of CO2 during growing season: relation to weather conditions.
International Agrophysics. Roč. 28, č. 2 (2014), s. 239-249. ISSN 0236-8722. E-ISSN 2300-8725
Grant CEP: GA MŠMT(CZ) ED1.1.00/02.0073; GA MŠMT(CZ) EE2.4.31.0056; GA MŠMT(CZ) LM2010007
Institucionální podpora: RVO:67179843
Klíčová slova: net ecosystem production * CO2 source days * eddy covariance * weather conditions * Norway spruce
Kód oboru RIV: EH - Ekologie - společenstva
Impakt faktor: 1.117, rok: 2014

Net ecosystem production reflects the potential of the ecosystem to sequestrate atmospheric CO2. Daily net ecosystem production of a mountain Norway spruce forest of the temperate zone (Czech Republic) was determined using the eddy covariance method. Growing season days when the ecosystem was a CO2 source were examined with respect to current weather conditions. During the 2005, 2006, and 2007 growing seasons, there were 44, 65, and 39 days, respectively, when the forest was a net CO2 source. The current weather conditions associated with CO2 release during the growing seasons were: cool and overcast conditions at the beginning or end of the growing seasons characterized by a 3-year mean net ecosystem production of -7.2 kg C ha-1 day-1; overcast or/and rainy days (-23.1 kg C ha-1 day-1); partly cloudy and hot days (-11.8 kg C ha-1 day-1); and overcast and hot days (-13.5 kg C ha-1 day-1). CO2 release was the highest during the overcast or/and rainy conditions (84%, average from all years), which had the greatest impact during the major production periods. As forests are important CO2 sinks and more frequent weather extremes are expected due to climate change, it is important to predict future forest carbon balances to study the influence of heightened variability in climatic variables.
Trvalý link: http://hdl.handle.net/11104/0235140