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Fire carbon emissions over Equatorial Asia reduced by shortened dry seasons

Wang, Sifan ; He, Bin ; Chen, Hans W. LU ; Chen, Deliang ; Chen, Yaning ; Yuan, Wenping ; Shi, Feng ; Duan, Jianping ; Wu, Wei and Chen, Tiexi , et al. (2023) In npj Climate and Atmospheric Science 6(1).
Abstract

Fire carbon emissions over Equatorial Asia (EQAS) play a critical role in the global carbon cycle. Most regional fire emissions (89.0%) occur in the dry season, but how changes in the dry-season length affect the fire emissions remains poorly understood. Here we show that, the length of the EQAS dry season has decreased significantly during 1979–2021, and the delayed dry season onset (5.4 ± 1.6 (± one standard error) days decade−1) due to increased precipitation (36.4 ± 9.1 mm decade−1) in the early dry season is the main reason. The dry season length is strongly correlated with the length of the fire season. Increased precipitation during the early dry season led to a significant reduction (May: −0.7 ± 0.4 Tg C... (More)

Fire carbon emissions over Equatorial Asia (EQAS) play a critical role in the global carbon cycle. Most regional fire emissions (89.0%) occur in the dry season, but how changes in the dry-season length affect the fire emissions remains poorly understood. Here we show that, the length of the EQAS dry season has decreased significantly during 1979–2021, and the delayed dry season onset (5.4 ± 1.6 (± one standard error) days decade−1) due to increased precipitation (36.4 ± 9.1 mm decade−1) in the early dry season is the main reason. The dry season length is strongly correlated with the length of the fire season. Increased precipitation during the early dry season led to a significant reduction (May: −0.7 ± 0.4 Tg C decade−1; August: −12.9 ± 6.7 Tg C decade−1) in fire carbon emissions during the early and peak fire season. Climate models from the Coupled Model Intercomparison Project Phase 6 project a continued decline in future dry season length in EQAS under medium and high-emission scenarios, implying further reductions in fire carbon emissions.

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publishing date
type
Contribution to journal
publication status
published
subject
in
npj Climate and Atmospheric Science
volume
6
issue
1
article number
129
publisher
Springer Nature
external identifiers
  • scopus:85169020882
ISSN
2397-3722
DOI
10.1038/s41612-023-00455-7
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2023, Springer Nature Limited.
id
56f38cdf-117f-4607-94e1-2fc99b269c9f
date added to LUP
2023-09-18 13:02:34
date last changed
2023-09-18 13:02:34
@article{56f38cdf-117f-4607-94e1-2fc99b269c9f,
  abstract     = {{<p>Fire carbon emissions over Equatorial Asia (EQAS) play a critical role in the global carbon cycle. Most regional fire emissions (89.0%) occur in the dry season, but how changes in the dry-season length affect the fire emissions remains poorly understood. Here we show that, the length of the EQAS dry season has decreased significantly during 1979–2021, and the delayed dry season onset (5.4 ± 1.6 (± one standard error) days decade<sup>−1</sup>) due to increased precipitation (36.4 ± 9.1 mm decade<sup>−1</sup>) in the early dry season is the main reason. The dry season length is strongly correlated with the length of the fire season. Increased precipitation during the early dry season led to a significant reduction (May: −0.7 ± 0.4 Tg C decade<sup>−1</sup>; August: −12.9 ± 6.7 Tg C decade<sup>−1</sup>) in fire carbon emissions during the early and peak fire season. Climate models from the Coupled Model Intercomparison Project Phase 6 project a continued decline in future dry season length in EQAS under medium and high-emission scenarios, implying further reductions in fire carbon emissions.</p>}},
  author       = {{Wang, Sifan and He, Bin and Chen, Hans W. and Chen, Deliang and Chen, Yaning and Yuan, Wenping and Shi, Feng and Duan, Jianping and Wu, Wei and Chen, Tiexi and Guo, Lanlan and Zhong, Ziqian and Duan, Weili and Li, Zhi and Jiang, Weiguo and Huang, Ling and Hao, Xingming and Tang, Rui and Liu, Huiming and Zhang, Yafeng and Xie, Xiaoming}},
  issn         = {{2397-3722}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Springer Nature}},
  series       = {{npj Climate and Atmospheric Science}},
  title        = {{Fire carbon emissions over Equatorial Asia reduced by shortened dry seasons}},
  url          = {{http://dx.doi.org/10.1038/s41612-023-00455-7}},
  doi          = {{10.1038/s41612-023-00455-7}},
  volume       = {{6}},
  year         = {{2023}},
}