Interannual variability of terpenoid emissions in an alpine city

0557280 - ÚVGZ 2023 RIV DE eng J - Článek v odborném periodiku
Kaser, L. - Peron, A. - Graus, M. - Striednig, M. - Wohlfahrt, G. - Juráň, Stanislav - Karl, T.
Interannual variability of terpenoid emissions in an alpine city.
Atmospheric Chemistry and Physics. Roč. 22, č. 8 (2022), s. 5603-5618. ISSN 1680-7316. E-ISSN 1680-7324
Grant CEP: GA MŠMT(CZ) EF16_019/0000797
Institucionální podpora: RVO:86652079
Klíčová slova: volatile organic-compounds * isoprene emission * monoterpene emissions * flux measurements * air-quality * holm oak * anthropogenic isoprene * biogenic hydrocarbons * ecosystem services * ozone precursors
Obor OECD: Meteorology and atmospheric sciences
Impakt faktor: 6.3, rok: 2022
Způsob publikování: Open access
https://acp.copernicus.org/articles/22/5603/2022/acp-22-5603-2022.pdf

Terpenoid emissions above urban areas are a complex mix of biogenic and anthropogenic emission sources. In line with previous studies we found that summertime terpenoid fluxes in an alpine city were dominated by biogenic sources. Inter-seasonal emission measurements revealed consistency for monoterpenes and sesquiterpenes but a large difference in isoprene between the summers of 2015 and 2018. Standardized emission potentials for monoterpenes and sesquiterpenes were 0.12 nmol m(-2) s(-1) and 3.0 x 10(-3) nmol m(-2) s(-1) in 2015 and 0.11 nmol m(-2) s(-1) and 3.4 x 10(-3) nmol m(-2) s(-1) in 2018, respectively. Observed isoprene fluxes were almost 3 times higher in 2018 than in 2015. This factor decreased to 2.3 after standardizing isoprene fluxes to 30 degrees C air temperature and photosynthetic active radiation (PAR) to 1000 mu mol m(-2) s(-1). Based on emission model parameterizations, increased leaf temperatures can explain some of these differences, but standardized isoprene emission potentials remained higher in 2018 when a heat wave persisted. These data suggest a higher variability of interannual isoprene fluxes than for other terpenes. Potential reasons for the observed differences such as emission parameterization, footprint changes, water stress conditions, and tree trimming are investigated.
Trvalý link: http://hdl.handle.net/11104/0331287