Seasonal and Elevational Variability in Dwarf Birch VOC Emissions in Greenlandic Tundra DOI Creative Commons
Jolanta Rieksta, Tao Li, Cleo L. Davie‐Martin

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2023, Volume and Issue: 128(11)

Published: Nov. 1, 2023

Abstract Rising temperatures amplify biogenic volatile organic compound (VOC) emissions from Arctic vegetation, causing feedbacks to the climate system. Changes in also alter plant physiology and vegetation composition, all of which can influence VOC emissions. Moreover, leaf development biotic stresses cause highly variable during growing season. Therefore, linking with traits tracking responses change might provide better understanding emission regulation under future conditions. We measured other dwarf birch ( Betula glandulosa ) at two elevations Narsarsuaq, South Greenland. The measurements were performed warming experiments that have run since 2016. collected VOCs using branch enclosure method early June until late July 2019 n = 200). Emissions green volatiles (GLVs), oxygenated monoterpenes (oMTs), homoterpenes followed a seasonal trend. rates diversity blend decreased end measurement period. Differences between pronounced Majority did not explain variation show strong variability within season, is likely driven by phenology. While was greater milder low‐elevation site, higher or similar harsher high‐elevation showing stronger potentials than previously assumed. Seasonal variations are crucial for accurate predictions current arctic ecosystems.

Language: Английский

Emissions of volatile organic compounds from Norway spruce and potential atmospheric impacts DOI Creative Commons

Hannele Hakola,

Ditte Taipale, Arnaud P. Praplan

et al.

Frontiers in Forests and Global Change, Journal Year: 2023, Volume and Issue: 6

Published: March 23, 2023

Published biogenic volatile organic compound (BVOC) emission rates of Norway spruces vary a lot. In this study we combined published spruce measured in boreal forests and added our new, unpublished data from Southern (SF) Northern Finland (NF). Standardized summer monthly mean potentials isoprene below the detection limit to 7 μg g –1 (dw) h , monoterpene (MT) sesquiterpene (SQT) 0.01–3 0.03–2.7 respectively. study, found much higher SQT emissions than previously measured, on average SQTs had or MTs. The highest potential 13.6 was observed September Finland. We that none younger (33–40 years) trees Hyytiälä, Finland, emitted isoprene, while one 50-year-old tree strong emitter. difference due age could not be confirmed, since all small were growing so also same genetic origin. On average, older (>80 about ten times more MTs ones (<80 years), but no clear seen emissions. can related stress effects. As shown here for spruce, it is possible factor significantly what currently used models, which may have significant effects prediction formation growth new particles, secondary aerosol (SOA) high, particles. Due high SQTs, impact SOA mass even higher.

Language: Английский

Citations

12
Arctic Heatwaves Could Significantly Influence the Isoprene Emissions From Shrubs DOI Creative Commons
Hui Wang, Allison Welch, Sanjeevi Nagalingam

et al.

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 51(2)

Published: Jan. 21, 2024

Abstract Warming climate in the Arctic is leading to an increase isoprene emission from ecosystems. We assessed influence of temperature on willows with laboratory and field measurements. Our findings indicate that hourly response curve Salix spp., dominant emitting shrub Arctic, aligns temperate plants. In contrast, capacity exhibited a more substantial than expected mean ambient previous day, which much stronger daily predicted by current version Model Emissions Gases Aerosols Nature (MEGAN). With modified algorithm this study, MEGAN predicts 66% higher emissions for during heatwave. However, despite these findings, we are still unable fully explain high sensitivity latitude

Language: Английский

Citations

4
Constraining non-methane VOC emissions with TROPOMI HCHO observations: impact on summertime ozone simulation in August 2022 in China DOI Creative Commons
Shuzhuang Feng, Fei Jiang,

Tianlu Qian

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(13), P. 7481 - 7498

Published: July 2, 2024

Abstract. Non-methane volatile organic compounds (NMVOC), serving as crucial precursors of O3, have a significant impact on atmospheric oxidative capacity and O3 formation. However, both anthropogenic biogenic NMVOC emissions remain subject to considerable uncertainty. Here, we extended the Regional multi-Air Pollutant Assimilation System (RAPAS) using ensemble Kalman filter (EnKF) algorithm optimize in China August 2022 by assimilating TROPOspheric Monitoring Instrument (TROPOMI) HCHO retrievals. We also simultaneously NOx situ NO2 observations address chemical feedback among VOCs–NOx–O3. Furthermore, process-based analysis was employed quantify emission changes various reactions related formation depletion. exhibited substantial reduction 50.2 %, especially middle lower reaches Yangtze River, revealing prior overestimation due an extreme heat wave. Compared forecast with emissions, posterior significantly improved simulations, reducing biases 75.7 indicating notable decrease uncertainties. The effectively corrected forecasts 49.3 %. This can be primarily attributed RO2+NO reaction rate increase NO2+OH afternoon, thus limiting generation. Sensitivity analyses emphasized necessity considering for comprehensive assessment chemistry. study enhances our understanding effects production contribute development effective policies.

Language: Английский

Citations

4
Weather History-based Parameterization of the G-93 Isoprene Emission Formula for the Tropical Plant Ficus septica DOI
Ishmael Mutanda,

Masashi Inafuku,

Hirosuke Oku

et al.

Atmospheric Environment, Journal Year: 2025, Volume and Issue: unknown, P. 121102 - 121102

Published: Feb. 1, 2025

Language: Английский

Citations

0
Plant volatile organic compounds: Emission and perception in a changing world DOI Creative Commons
Matthew E. Bergman, Xingqi Huang, Sylvie Baudino

et al.

Current Opinion in Plant Biology, Journal Year: 2025, Volume and Issue: 85, P. 102706 - 102706

Published: March 29, 2025

Language: Английский

Citations

0
Heatwaves Suppress Isoprene Emission Optima in Subtropical Eucalyptus: Implications for Biogenic VOC Modeling Under Extreme Thermal Events DOI Creative Commons
Jianqiang Zeng, Yanli Zhang,

Weihua Pang

et al.

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(7)

Published: March 28, 2025

Abstract Isoprene emissions from tropical plants under moderate conditions are more temperature‐sensitive than temperate and current model predictions. However, the effect of extreme heatwaves on this sensitivity remains uncertain. Here, we present controlled measurements isoprene temperature responses for a subtropical eucalyptus species, revealing surprising shift during heatwaves. During non‐heatwave periods, followed established patterns with well‐defined optimum ( T opt ); restricted plant physiological processes, resulting in an unexpected decrease . Current models, which consider acclimation based long‐term averages, failed to capture shift, predicting higher values Remarkably, simulations using default curve that assumes no accurately replicated observed both heatwave conditions. Our findings highlight potential heat suppress regions need reconsider isoprene‐temperature relationships future climate.

Language: Английский

Citations

0
Impact of temperature on the biogenic volatile organic compound (BVOC) emissions in China: A review DOI
Yiming Yang,

Fengbin Sun,

Yusheng Chen

et al.

Journal of Environmental Sciences, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

Citations

0
Increased Growth Temperatures Alter Arctic Plant Responses to Heat Wave and Drought DOI Creative Commons
Marta Contreras‐Serrano,

Neel Lindsby,

Riikka Rinnan

et al.

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(4)

Published: April 1, 2025

ABSTRACT Persistent warming and higher frequency of heat waves in the Arctic are causing alterations vegetation plant functionality, potentially redefining role ecosystem. Vegetation influences atmospheric composition through exchanges CO 2 volatile organic compounds (VOCs), both processes exhibiting a strong response to temperature variations. However, our quantitative understanding how increased temperatures interact with extreme weather events, namely drought, affect remains limited. Here, we measure phenology, photosynthesis, leaf fluorescence VOC emissions from three widely distributed shrubs, Betula nana , Empetrum hermaphroditum Salix spp., future climate. We use state‐of‐the‐art climate chambers test effects warmer growth on shrub responses drought. Our results show that advance unfolding by 24 days B. 17 E. increase across species. For photosynthesis decreased 42% during wave 72% In contrast, spp. experienced only 62% 71%, respectively. The shifted toward less diverse compound profile: acetaldehyde for control warmed plants all species, isoprene Additionally, grown at exhibited twofold compared wave, suggesting sensitivity emissions. study indicates increasingly frequent events will significantly impact diversity rates VOCs emitted into atmosphere, contributing modifying regional

Language: Английский

Citations

0
BVOC emissions from trees in urban residential neighborhoods: spatial patterns and drivers DOI
Xinxin Bao, Weiqi Zhou,

明夫 角

et al.

Urban forestry & urban greening, Journal Year: 2025, Volume and Issue: unknown, P. 128841 - 128841

Published: April 1, 2025

Language: Английский

Citations

0
Optimizing the Temperature Sensitivity of the Isoprene Emission Model MEGAN in Different Ecosystems Using a Metropolis‐Hastings Markov Chain Monte Carlo Method DOI Creative Commons
Christian DiMaria, Dylan B. A. Jones, Valerio Ferracci

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2025, Volume and Issue: 130(5)

Published: May 1, 2025

Abstract Isoprene is a reactive hydrocarbon emitted to the atmosphere in large quantities by terrestrial vegetation. Annual total isoprene emissions exceed 300 Tg −1 , but emission rates vary widely among plant species and are sensitive meteorological environmental conditions including temperature, sunlight, soil moisture. Due its high reactivity, has impact on air quality climate pollutants such as ozone aerosols. It also an important sink for hydroxyl radical which impacts lifetime of greenhouse gas methane along with many other trace species. Modeling atmospheric chemistry requires accurate estimates. These can be obtained using empirical Model Emissions Gases Aerosols from Nature (MEGAN), parameterization this model uncertain due part limited field observations. In study, we use ground‐based measurements concentrations fluxes 11 sites assess variability temperature response across ecosystems. We then these observations Metropolis‐Hastings Markov Chain Monte Carlo (MHMCMC) data assimilation framework optimize MEGAN function. find that performance significantly improved at several high‐latitude increasing modeled sensitivity past temperatures. At some sites, optimized was nearly four times more than unoptimized model. This implications modeling warming climate.

Language: Английский

Citations

0