Thomas Holst
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View article: Towards a remote-sensing driven model of isoprene emissions from Alpine Tundra.
Towards a remote-sensing driven model of isoprene emissions from Alpine Tundra. Open
This study investigates isoprene emissions in a high-latitude Alpine tundra ecosystem, focusing on using near-field remote sensing of surface temperatures, the Photochemical Reflectance Index (PRI) and Normalized Difference Vegetation Inde…
View article: Optimizing the Temperature Sensitivity of the Isoprene Emission Model MEGAN in Different Ecosystems Using a Metropolis‐Hastings Markov Chain Monte Carlo Method
Optimizing the Temperature Sensitivity of the Isoprene Emission Model MEGAN in Different Ecosystems Using a Metropolis‐Hastings Markov Chain Monte Carlo Method Open
Isoprene is a reactive hydrocarbon emitted to the atmosphere in large quantities by terrestrial vegetation. Annual total isoprene emissions exceed 300 Tg a −1 , but emission rates vary widely among plant species and are sensitive to meteor…
View article: BVOC fluxes and concentrations at a boreal forest site in Sweden: an overview of long-term observations at ICOS Norunda and the impacts of forest clear-cutting on BVOC emissions
BVOC fluxes and concentrations at a boreal forest site in Sweden: an overview of long-term observations at ICOS Norunda and the impacts of forest clear-cutting on BVOC emissions Open
Vegetation is the major source of volatile organic compounds (VOCs) in the atmosphere, which affect both air quality and climate. Long-term ecosystem-level data on biogenic VOC (BVOC) emissions, however, are limited. This limits assessment…
View article: Characterizing marine atmospheric VOC diversity and fluxes using PTR-TOF-MS measurements in the Baltic Sea
Characterizing marine atmospheric VOC diversity and fluxes using PTR-TOF-MS measurements in the Baltic Sea Open
We present continuous measurements of volatile organic compounds (VOCs) and their fluxes in the marine atmospheric boundary layer using proton‐transfer‐reaction time‐of‐flight mass spectrometry (PTR-TOF-MS) coupled …
View article: Emerging diversity of volatile organic compounds from freshwater and marine ecosystems
Emerging diversity of volatile organic compounds from freshwater and marine ecosystems Open
The chemical diversity of volatile organic compound (VOC) emissions from terrestrial vegetation is relatively well understood, while research on VOC emissions from freshwater and marine systems has largely focused on dimethyl sulfide (DMS)…
View article: VOC fluxes of a subarctic mountain birch forest
VOC fluxes of a subarctic mountain birch forest Open
Biogenic volatile organic compounds (BVOCs) play a significant role in the interactions between the biosphere and the atmosphere, but their impact in northern latitudes is difficult to quantify due to a lack of measurements and modeling st…
View article: Isoprene emission from Sphagnum species occupying different growth positions above the water table
Isoprene emission from Sphagnum species occupying different growth positions above the water table Open
Isoprene emission from Sphagnum species naturally growing at different positions above the water table were measured in a subarctic peatland and at monoliths from a temperate bog. Our objectives were to investigate (1) whether emission rat…
View article: Seasonal variation in biogenic volatile organic compound (BVOC) emissions from Norway spruce in a Swedish boreal forest
Seasonal variation in biogenic volatile organic compound (BVOC) emissions from Norway spruce in a Swedish boreal forest Open
Terpene emissions from the top-canopy layer (at 20 m) of one 118-year-old Norway spruce tree were measured between June and September 2013 using a branch chamber. Total terpene emissions varied from 0.05 to 332.5 µg gdw–1 h–1 with a peak i…
View article: Biogenic volatile organic compound emissions from a boreal forest floor
Biogenic volatile organic compound emissions from a boreal forest floor Open
A dynamic soil chamber was used to quantify biogenic volatile organic compound (BVOC) emissions from the forest floor of a Norway spruce and Scots pine dominated boreal forest. To carry out measurements (five campaigns from June to October…
View article: BVOC and speciated monoterpene concentrations and fluxes at a Scandinavian boreal forest
BVOC and speciated monoterpene concentrations and fluxes at a Scandinavian boreal forest Open
Boreal forests emit terpenoid biogenic volatile organic compounds (BVOCs) that significantly impact atmospheric chemistry. Our understanding of the variation of BVOC species emitted from boreal ecosystems is based on relatively few dataset…
View article: High temperature sensitivity of Arctic isoprene emissions explained by sedges
High temperature sensitivity of Arctic isoprene emissions explained by sedges Open
It has been widely reported that isoprene emissions from the Arctic ecosystem have a strong temperature response. Here we identify sedges ( Carex spp. and Eriophorum spp.) as key contributors to this high sensitivity using plant chamber ex…
View article: Wildfire impacts on the carbon budget of a managed Nordic boreal forest
Wildfire impacts on the carbon budget of a managed Nordic boreal forest Open
Wildfire is one of the most important disturbances affecting boreal forests. Most previous research on boreal forest fires has occurred in North American forests which have different fire regimes, tree species and are less intensively mana…
View article: Ozone stress response of leaf <scp>BVOC</scp> emission and photosynthesis in mountain birch (<i>Betula pubescens</i> spp. <i>czerepanovii</i>) depends on leaf age
Ozone stress response of leaf <span>BVOC</span> emission and photosynthesis in mountain birch (<i>Betula pubescens</i> spp. <i>czerepanovii</i>) depends on leaf age Open
Oxidative stress from ozone (O 3 ) causes plants to alter their emission of biogenic volatile organic compounds (BVOC) and their photosynthetic rate. Stress reactions from O 3 on birch trees can result in prohibited plant growth and lead t…
View article: Quantification of process-induced effects on fatigue life of short-glass-fiber-filled adhesive used in wind turbine rotor blades
Quantification of process-induced effects on fatigue life of short-glass-fiber-filled adhesive used in wind turbine rotor blades Open
Cracks in the adhesive joints of wind turbine blades can often cause severe structural blade damage. Effects induced by the manufacturing process can have a significant impact on the cycle number toward crack initiation in the bonding mate…
View article: Vertical distribution of sources and sinks of volatile organic compounds within a boreal forest canopy
Vertical distribution of sources and sinks of volatile organic compounds within a boreal forest canopy Open
The ecosystem–atmosphere flux of biogenic volatile organic compounds (BVOCs) has important impacts on tropospheric oxidative capacity and the formation of secondary organic aerosols, influencing air quality and climate. Here we present wit…
View article: The two towers: CO2 fluxes after wildfire in managed Swedish boreal forest stands
The two towers: CO2 fluxes after wildfire in managed Swedish boreal forest stands Open
Wildfires have been effectively suppressed in the managed boreal forests of Fennoscandia for over a century. However, recent extremely hot and dry summers have highlighted the vulnerability of these forests to increasing wildfire frequency…
View article: Spruce bark beetles ( <i>Ips typographus</i> ) cause up to 700 times higher bark BVOC emission rates compared to healthy Norway spruce ( <i>Picea abies</i> )
Spruce bark beetles ( <i>Ips typographus</i> ) cause up to 700 times higher bark BVOC emission rates compared to healthy Norway spruce ( <i>Picea abies</i> ) Open
Biogenic volatile organic compound (BVOC) emissions from trees subjected to biotic stress are higher compared to healthy trees, and they may also have a different compound composition. This in turn affects atmospheric chemistry and can lea…
View article: Vertical distribution of sources and sinks of VOCs within a boreal forest canopy
Vertical distribution of sources and sinks of VOCs within a boreal forest canopy Open
The ecosystem-atmosphere flux of biogenic volatile organic compounds (BVOCs) has important impacts on tropospheric oxidative capacity and the formation of secondary organic aerosols, influencing air quality and climate. Here we present wit…
View article: Strong isoprene emission response to temperature in tundra vegetation
Strong isoprene emission response to temperature in tundra vegetation Open
Emissions of biogenic volatile organic compounds (BVOCs) are a crucial component of biosphere–atmosphere interactions. In northern latitudes, climate change is amplified by feedback processes in which BVOCs have a recognized, yet poorly qu…
View article: Dataset: Strong isoprene emission response to temperature in tundra vegetation
Dataset: Strong isoprene emission response to temperature in tundra vegetation Open
Dataset used in the article "Strong isoprene emission response to temperature in tundra vegetation" published in the journal Proceedings of the National Academy of Sciences of the USA 119: e2118014119 https://doi.org/10.1073/pnas.211801411…
View article: Dataset: Strong isoprene emission response to temperature in tundra vegetation
Dataset: Strong isoprene emission response to temperature in tundra vegetation Open
Dataset used in the article "Strong isoprene emission response to temperature in tundra vegetation" published in the journal Proceedings of the National Academy of Sciences of the USA 119: e2118014119 https://doi.org/10.1073/pnas.211801411…
View article: Comment on bg-2022-125
Comment on bg-2022-125 Open
Abstract. Emissions of biogenic volatile organic compound (BVOC) from the bark of Norway spruce (Picea abies) trees can be affected by stress, such as infestation of spruce bark beetles (Ips typographus). We studied the difference in emiss…
View article: Spruce bark beetle (Ips typographus) infestation cause up to 700 times higher bark BVOC emission rates from Norway spruce (Picea abies)
Spruce bark beetle (Ips typographus) infestation cause up to 700 times higher bark BVOC emission rates from Norway spruce (Picea abies) Open
Emissions of biogenic volatile organic compound (BVOC) from the bark of Norway spruce (Picea abies) trees can be affected by stress, such as infestation of spruce bark beetles (Ips typographus). We studied the difference in emission rates …
View article: Bidirectional Exchange of Biogenic Volatile Organic Compounds in Subarctic Heath Mesocosms During Autumn Climate Scenarios
Bidirectional Exchange of Biogenic Volatile Organic Compounds in Subarctic Heath Mesocosms During Autumn Climate Scenarios Open
Biogenic volatile organic compound (BVOC) flux dynamics during the subarctic autumn are largely unexplored and have been considered insignificant due to the relatively low biological activity expected during autumn. Here, we exposed subarc…
View article: Data: Boreal forest soil carbon fluxes one year after a wildfire: Effects of burn severity and management
Data: Boreal forest soil carbon fluxes one year after a wildfire: Effects of burn severity and management Open
2018 Boreal forest fires in Sweden: Measurements of soil CO2 and CH4 fluxes, soil microclimate and nutrient content during the first growing season after a wildfire, from forest sites impacted by different fire severity (tree mortality) an…
View article: Data: Boreal forest soil carbon fluxes one year after a wildfire: Effects of burn severity and management
Data: Boreal forest soil carbon fluxes one year after a wildfire: Effects of burn severity and management Open
2018 Boreal forest fires in Sweden: Measurements of soil CO2 and CH4 fluxes, soil microclimate and nutrient content during the first growing season after a wildfire, from forest sites impacted by different fire severity (tree mortality) an…
View article: Strong isoprene emission response to temperature in tundra vegetation
Strong isoprene emission response to temperature in tundra vegetation Open
<p>Biogenic emissions of volatile organic compounds (BVOCs) are a crucial component of biosphere-atmosphere interactions. In northern latitudes, climate change is amplified by feedback processes in which BVOCs have a recognized, yet …
View article: Leaf-Scale Study of Biogenic Volatile Organic Compound Emissions from Willow (Salix spp.) Short Rotation Coppices Covering Two Growing Seasons
Leaf-Scale Study of Biogenic Volatile Organic Compound Emissions from Willow (Salix spp.) Short Rotation Coppices Covering Two Growing Seasons Open
In Europe, willow (Salix spp.) trees have been used commercially since the 1980s at a large scale to produce renewable energy. While reducing fossil fuel needs, growing short rotation coppices (SRCs), such as poplar or willow, may have a h…
View article: Boreal forest soil carbon fluxes one year after a wildfire: Effects of burn severity and management
Boreal forest soil carbon fluxes one year after a wildfire: Effects of burn severity and management Open
The extreme 2018 hot drought that affected central and northern Europe led to the worst wildfire season in Sweden in over a century. The Ljusdal fire complex, the largest area burnt that year (8995 ha), offered a rare opportunity to quanti…