Separating direct and indirect effects of rising temperatures on biogenic volatile emissions in the Arctic.

ABSTRACT: Volatile organic compounds (VOCs) are released from biogenic sources in a temperature-dependent manner. Consequently, Arctic ecosystems are expected to greatly increase their VOC emissions with ongoing climate warming, which is proceeding at twice the rate of global temperature rise. Here, we show that ongoing warming has strong, increasing effects on Arctic VOC emissions. Using a combination of statistical modeling on data from several warming experiments in the Arctic tundra and dynamic ecosystem modeling, we separate the impacts of temperature and soil moisture into direct effects and indirect effects through vegetation composition and biomass alterations. The indirect effects of warming on VOC emissions were significant but smaller than the direct effects, during the 14-y model simulat

SUBMITTER: Rinnan R 

PROVIDER: S-EPMC7768730 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature