The role of plant phenology in stomatal ozone flux modeling
© 2017 John Wiley & Sons Ltd.
Veröffentlicht in: | Global change biology. - 1999. - 24(2018), 1 vom: 19. Jan., Seite 235-248 |
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1. Verfasser: | |
Weitere Verfasser: | , , , , , |
Format: | Online-Aufsatz |
Sprache: | English |
Veröffentlicht: |
2018
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Zugriff auf das übergeordnete Werk: | Global change biology |
Schlagworte: | Journal Article Research Support, Non-U.S. Gov't dormancy date green-up date ozone phytotoxic ozone dose risk assessment stomatal conductance Ozone 66H7ZZK23N |
Zusammenfassung: | © 2017 John Wiley & Sons Ltd. Plant phenology plays a pivotal role in the climate system as it regulates the gas exchange between the biosphere and the atmosphere. The uptake of ozone by forest is estimated through several meteorological variables and a specific function describing the beginning and the termination of plant growing season; actually, in many risk assessment studies, this function is based on a simple latitude and topography model. In this study, using two satellite datasets, we apply and compare six methods to estimate the start and the end dates of the growing season across a large region covering all Europe for the year 2011. Results show a large variability between the green-up and dormancy dates estimated using the six different methods, with differences greater than one month. However, interestingly, all the methods display a common spatial pattern in the uptake of ozone by forests with a marked change in the magnitude, up to 1.9 TgO3 /year, and corresponding to a difference of 25% in the amount of ozone that enters the leaves. Our results indicate that improved estimates of ozone fluxes require a better representation of plant phenology in the models used for O3 risk assessment |
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Beschreibung: | Date Completed 10.10.2018 Date Revised 10.10.2018 published: Print-Electronic Citation Status MEDLINE |
ISSN: | 1365-2486 |
DOI: | 10.1111/gcb.13823 |