Drought shifts ozone deposition pathways in spruce forest from stomatal to non-stomatal flux

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F25%3A00619039" target="_blank" >RIV/86652079:_____/25:00619039 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0269749125004543?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0269749125004543?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.envpol.2025.126081" target="_blank" >10.1016/j.envpol.2025.126081</a>

Result language

angličtina

Original language name

Drought shifts ozone deposition pathways in spruce forest from stomatal to non-stomatal flux

Original language description

Dry deposition is the primary pathway for tropospheric ozone (O3) removal, with forests playing a critical role. However, environmental stressors such as drought can reduce this removal capacity by limiting stomatal O3 uptake due to stomata closure. Here we test the hypothesis that combined soil and atmospheric drought reduces the O3 sink capacity of forest ecosystems by diminishing stomatal O3 flux. For stomatal O3 flux estimation, we applied a single-layer resistance model, which estimates stomatal O3 flux based on evaporative resistance method complemented by aerodynamic and laminar sublayer resistances calculation. The model was complemented by detailed sap flow monitoring within the forest footprint, to calculate stomatal O3 flux, using long-term eddy covariance measurements of total water vapour and O3 fluxes over four growing seasons (2017–2020), including an unprecedented drought period. The results revealed that non-stomatal O3 flux compensated for the reduction in stomatal flux in a temperate Norway spruce forest at the Bílý Kříž experimental site in the mountainous region of the Czech Republic, Central Europe. Ozone consumption through interactions with volatile organic compounds, quantified by the MEGAN (Model of Emissions of Gases and Aerosols from Nature) model, contributed only marginally to the non-stomatal flux. These findings suggest that surface reactions, where O3 interacts with plant surfaces, cuticular layers, and soil particles, likely constitute a dominant non-stomatal O3 sink during drought. To our knowledge, this is the first report of severe drought influencing O3 fluxes in temperate mountainous regions, which were previously considered less affected by drought stress.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Environmental Pollution

ISSN

0269-7491

e-ISSN

1873-6424

Volume of the periodical

372

Issue of the periodical within the volume

MAY

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

126081

UT code for WoS article

001468220300001

EID of the result in the Scopus database

2-s2.0-105000240820