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High temperature sensitivity of Arctic isoprene emissions explained by sedges

Wang, Hui ; Welch, Allison M ; Nagalingam, Sanjeevi ; Leong, Christopher ; Czimczik, Claudia I ; Seco, Roger ; Rinnan, Riikka LU ; Vettikkat, Lejish ; Schobesberger, Siegfried and Holst, Thomas LU , et al. (2024) In Nature Communications 15(1).
Abstract

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... (More)

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.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
BVOC, isoprene, climate change effects, high latitude
in
Nature Communications
volume
15
issue
1
article number
6144
publisher
Nature Publishing Group
external identifiers
  • pmid:39034371
  • pmid:39034371
  • scopus:85199190874
ISSN
2041-1723
DOI
10.1038/s41467-024-49960-0
language
English
LU publication?
yes
id
5520df36-6fa6-45fc-a2b8-46e2b3a4b64d
date added to LUP
2024-07-22 11:34:00
date last changed
2025-01-29 10:19:54
@article{5520df36-6fa6-45fc-a2b8-46e2b3a4b64d,
  abstract     = {{<p>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.</p>}},
  author       = {{Wang, Hui and Welch, Allison M and Nagalingam, Sanjeevi and Leong, Christopher and Czimczik, Claudia I and Seco, Roger and Rinnan, Riikka and Vettikkat, Lejish and Schobesberger, Siegfried and Holst, Thomas and Brijesh, Shobhit and Sheesley, Rebecca J and Barsanti, Kelley C and Guenther, Alex B}},
  issn         = {{2041-1723}},
  keywords     = {{BVOC; isoprene; climate change effects; high latitude}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Communications}},
  title        = {{High temperature sensitivity of Arctic isoprene emissions explained by sedges}},
  url          = {{http://dx.doi.org/10.1038/s41467-024-49960-0}},
  doi          = {{10.1038/s41467-024-49960-0}},
  volume       = {{15}},
  year         = {{2024}},
}