The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Default user image.

Thomas Holst

Researcher

Default user image.

High temperature sensitivity of Arctic isoprene emissions explained by sedges

Author

  • Hui Wang
  • Allison M Welch
  • Sanjeevi Nagalingam
  • Christopher Leong
  • Claudia I Czimczik
  • Roger Seco
  • Riikka Rinnan
  • Lejish Vettikkat
  • Siegfried Schobesberger
  • Thomas Holst
  • Shobhit Brijesh
  • Rebecca J Sheesley
  • Kelley C Barsanti
  • Alex B Guenther
Show all

Summary, in English

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 experiments. We observe that sedges exhibit a markedly stronger temperature response compared to that of other isoprene emitters and predictions by the widely accepted isoprene emission model, the Model of Emissions of Gases and Aerosols from Nature (MEGAN). MEGAN is able to reproduce eddy-covariance flux observations at three high-latitude sites by integrating our findings. Furthermore, the omission of the strong temperature responses of Arctic isoprene emitters causes a 20% underestimation of isoprene emissions for the high-latitude regions of the Northern Hemisphere during 2000-2009 in the Community Land Model with the MEGAN scheme. We also find that the existing model had underestimated the long-term trend of isoprene emissions from 1960 to 2009 by 55% for the high-latitude regions.

Department/s

  • Department of Biology
  • MERGE: ModElling the Regional and Global Earth system
  • Centre for Healthy Indoor Environments
  • LTH Profile Area: Aerosols
  • Dept of Physical Geography and Ecosystem Science
  • BECC: Biodiversity and Ecosystem services in a Changing Climate

Publishing year

2024-07-21

Language

English

Publication/Series

Nature Communications

Volume

15

Issue

1

Document type

Journal article

Publisher

Nature Publishing Group

Topic

  • Earth and Related Environmental Sciences

Keywords

  • BVOC
  • isoprene
  • climate change effects
  • high latitude

Status

Published

ISBN/ISSN/Other

  • ISSN: 2041-1723