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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Environmental Pollution

ISSN

0269-7491

e-ISSN

1873-6424

Svazek periodika

372

Číslo periodika v rámci svazku

MAY

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

126081

Kód UT WoS článku

001468220300001

EID výsledku v databázi Scopus

2-s2.0-105000240820