Human Breathable Air in a Mediterranean Forest: Characterization of Monoterpene Concentrations under the Canopy

Albert Bach, Ana Maria Yáñez-Serrano, Joan Llusià, Iolanda Filella, Roser Maneja and Josep Penuelas
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Albert Bach: Institute of Environmental Science and Technology (ICTA), Autonomous University of Barcelona (UAB), Z Building, ICTA-ICP, Carrer de les columnes, UAB Campus, Bellaterra (Cerdanyola del Vallès), 08193 Barcelona, Spain
Ana Maria Yáñez-Serrano: CREAF, Campus Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Catalonia, Spain
Joan Llusià: CREAF, Campus Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Catalonia, Spain
Iolanda Filella: CREAF, Campus Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Catalonia, Spain
Roser Maneja: Environment and Human Health Laboratory (EH 2 Lab), Forest Science and Technology Center of Catalonia, Crta. de St. Llorenç de Morunys, km 2, 25280 Solsona, Spain
Josep Penuelas: CREAF, Campus Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Catalonia, Spain

IJERPH, 2020, vol. 17, issue 12, 1-11

Abstract: Monoterpenes have been identified as potential determinants of the human health effects induced by forest exposure. The present study characterizes the total monoterpene concentrations at nose height in a Mediterranean Holm oak forest located in North-East Iberian Peninsula during the annual emission peak (summer and autumn: June to November) using a Proton Transfer Reaction–Mass Spectrometry (PTR-MS). Results show a strong variability of the total monoterpene concentrations in season and daytime. The concentration peak appears during July and August. These two months displayed two average maxima in their diel cycles: One during early morning (from 6:00 to 8:00, 0.30 ppbv for July and 0.41 ppbv for August) and another one at early afternoon (from 13:00 to 15:00, 0.27 ppbv during July and 0.32 ppbv during August). Monoterpene concentrations were strongly related with the temperature (exponentially) and solar radiation (rectangular hyperbolic relationship). The concentrations registered here are similar or higher than in previous ex situ studies showcasing the effects of forests on human health. These findings provide relevant data for the scientific and healthcare community by improving the understanding of monoterpene dynamics at nose height and suggesting further research on the effects of forests on human health, particularly in the Mediterranean region.

Keywords: monoterpenes; forest exposure; PTR-MS; forest chemistry; BVOCs; forest bathing (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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