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Subarctic warming still boosts plant VOC emissions
After 13 years, +2°C open-top chambers raised subarctic heath sesquiterpenes fivefold and roughly doubled isoprene and monoterpenes, with vegetation shifts helping drive the fluxes.
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How long had the subarctic warming experiment run?
Effects remained strong after 13 years of treatment.
Source: Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions · DOI · quote verified
How much do the open-top tents warm plots?
About 2°C in air and 1–2°C in surface soil.
Source: Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions · DOI · quote verified
Which BVOC class increased most?
Sesquiterpenes, 5-fold under warming (P=0.006).
Source: Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions · DOI · quote verified
How did isoprene and monoterpenes respond in 2010?
Isoprene 1.9× and monoterpenes 2× with warming.
Source: Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions · DOI · quote verified
Was the measurement chamber much hotter on warmed plots?
Only +0.5°C on average during sampling.
Source: Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions · DOI · quote verified
What vegetation changes accompanied warming plus litter in 2010?
Higher cover of both deciduous and evergreen shrubs.
Source: Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions · DOI · quote verified
What happened to forbs by 2012?
Warming increased forb coverage versus other treatments.
Source: Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions · DOI · quote verified
How many plot replicates were used?
n = 6 sample plots.
Source: Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions · DOI · quote verified
How were BVOCs collected?
Stainless-steel tubes packed with Tenax TA and Carbograph 1TD.
Source: Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions · DOI · quote verified
What is the site climate?
Mean 2002–2011 temperature 0°C and precipitation 332 mm.
Source: Climate change-induced vegetation change as a driver of increased subarctic biogenic volatile organic compound emissions · DOI · quote verified