Abstract

PROUTSOS, Nikolaos; LIAKATAS, Αristotle; ALEXANDRIS, Stavros  and  TSIROS, Ioannis. Carbon fluxes above a deciduous forest in Greece. Atmósfera [online]. 2017, vol.30, n.4, pp.311-322. ISSN 0187-6236.  https://doi.org/10.20937/atm.2017.30.04.03.

Photosynthetic production in forest ecosystems occurs through the absorption of light and CO2. The present work deals with CO2 and carbon flux densities above a deciduous forest in Greece, the southernmost monitoring site in Europe. Results show annual net carbon absorption of 7.6 t C ha-1 y-1, indicating that this forest is a strong carbon sink compared to other European sites. However, absorbance may be reduced by 1 μmol m-2 s-1 for every 1.5 ºC above-canopy air temperature increase or 0.015 cm3 cm-3 active root-zone moisture depletion, beyond estimated optimum values. The forest acts as a carbon sink from late April to early November and as a source of carbon in the remaining period of the year. The highest CO2 net absorption flux occurs during June-July (approximately 200 g C m-2 month-1).

Keywords : Carbon fluxes; oak forest; photosynthetic active radiation (PAR); net radiation (R_net); temperature; net ecosystem exchange (NEE)..

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