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The Contribution of Vegetation-Climate Feedback and Resultant Sea Ice Loss to Amplified Arctic Warming During the Mid-Holocene

Chen, Jie ; Zhang, Qiong ; Kjellström, Erik ; Lu, Zhengyao LU and Chen, Fahu (2022) In Geophysical Research Letters 49(18).
Abstract

Understanding influence of vegetation on past temperature changes in the Arctic region would help isolate uncertainty and build understanding of its broader climate system, with implications for paleoclimate reconstructions and future climate change. Using an Earth system model EC-Earth, we conduct a series of simulations to investigate the impact of vegetation-climate feedback on the Arctic climate during the mid-Holocene. Results show Arctic greening induced by the warming resulting from stronger orbital forcing, further amplifies the Arctic warming. The increased vegetation contributes 0.33°C of Arctic warming and 0.35 × 106 km2 of Arctic sea ice loss. Increased Arctic vegetation leads to reduced land surface... (More)

Understanding influence of vegetation on past temperature changes in the Arctic region would help isolate uncertainty and build understanding of its broader climate system, with implications for paleoclimate reconstructions and future climate change. Using an Earth system model EC-Earth, we conduct a series of simulations to investigate the impact of vegetation-climate feedback on the Arctic climate during the mid-Holocene. Results show Arctic greening induced by the warming resulting from stronger orbital forcing, further amplifies the Arctic warming. The increased vegetation contributes 0.33°C of Arctic warming and 0.35 × 106 km2 of Arctic sea ice loss. Increased Arctic vegetation leads to reduced land surface albedo and increased evapotranspiration, both of which cause local warming in spring and summer. The resultant sea ice loss causes warming in the following seasons, with atmospheric circulation anomalies further amplifying the warming. Our results highlight the significant contribution of vegetation-climate feedback to Arctic climate under natural conditions.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Arctic warming, mid-Holocene, sea ice, vegetation-climate feedback
in
Geophysical Research Letters
volume
49
issue
18
article number
e2022GL098816
publisher
American Geophysical Union (AGU)
external identifiers
  • scopus:85139095576
ISSN
0094-8276
DOI
10.1029/2022GL098816
language
English
LU publication?
yes
id
77a5a144-49a7-4e29-a4ef-2b45bafff42a
date added to LUP
2022-12-12 08:48:14
date last changed
2022-12-12 08:49:45
@article{77a5a144-49a7-4e29-a4ef-2b45bafff42a,
  abstract     = {{<p>Understanding influence of vegetation on past temperature changes in the Arctic region would help isolate uncertainty and build understanding of its broader climate system, with implications for paleoclimate reconstructions and future climate change. Using an Earth system model EC-Earth, we conduct a series of simulations to investigate the impact of vegetation-climate feedback on the Arctic climate during the mid-Holocene. Results show Arctic greening induced by the warming resulting from stronger orbital forcing, further amplifies the Arctic warming. The increased vegetation contributes 0.33°C of Arctic warming and 0.35 × 10<sup>6</sup> km<sup>2</sup> of Arctic sea ice loss. Increased Arctic vegetation leads to reduced land surface albedo and increased evapotranspiration, both of which cause local warming in spring and summer. The resultant sea ice loss causes warming in the following seasons, with atmospheric circulation anomalies further amplifying the warming. Our results highlight the significant contribution of vegetation-climate feedback to Arctic climate under natural conditions.</p>}},
  author       = {{Chen, Jie and Zhang, Qiong and Kjellström, Erik and Lu, Zhengyao and Chen, Fahu}},
  issn         = {{0094-8276}},
  keywords     = {{Arctic warming; mid-Holocene; sea ice; vegetation-climate feedback}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{18}},
  publisher    = {{American Geophysical Union (AGU)}},
  series       = {{Geophysical Research Letters}},
  title        = {{The Contribution of Vegetation-Climate Feedback and Resultant Sea Ice Loss to Amplified Arctic Warming During the Mid-Holocene}},
  url          = {{http://dx.doi.org/10.1029/2022GL098816}},
  doi          = {{10.1029/2022GL098816}},
  volume       = {{49}},
  year         = {{2022}},
}