Plant uptake of CO(2) outpaces losses from permafrost and plant respiration on the Tibetan Plateau
High-latitude and high-altitude regions contain vast stores of permafrost carbon. Climate warming may result in the release of CO(2) from both the thawing of permafrost and accelerated autotrophic respiration, but it may also increase the fixation of CO(2) by plants, which could relieve or even offs...
Published in: | Proceedings of the National Academy of Sciences |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
National Academy of Sciences
2021
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8379928/ http://www.ncbi.nlm.nih.gov/pubmed/34373324 https://doi.org/10.1073/pnas.2015283118 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:8379928 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:8379928 2023-05-15T17:57:02+02:00 Plant uptake of CO(2) outpaces losses from permafrost and plant respiration on the Tibetan Plateau Wei, Da Qi, Yahui Ma, Yaoming Wang, Xufeng Ma, Weiqiang Gao, Tanguang Huang, Lin Zhao, Hui Zhang, Jianxin Wang, Xiaodan 2021-08-17 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8379928/ http://www.ncbi.nlm.nih.gov/pubmed/34373324 https://doi.org/10.1073/pnas.2015283118 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8379928/ http://www.ncbi.nlm.nih.gov/pubmed/34373324 http://dx.doi.org/10.1073/pnas.2015283118 Copyright © 2021 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) . CC-BY-NC-ND Proc Natl Acad Sci U S A Biological Sciences Text 2021 ftpubmed https://doi.org/10.1073/pnas.2015283118 2021-09-05T00:41:49Z High-latitude and high-altitude regions contain vast stores of permafrost carbon. Climate warming may result in the release of CO(2) from both the thawing of permafrost and accelerated autotrophic respiration, but it may also increase the fixation of CO(2) by plants, which could relieve or even offset the CO(2) losses. The Tibetan Plateau contains the largest area of alpine permafrost on Earth. However, the current status of the net CO(2) balance and feedbacks to warming remain unclear, given that the region has recently experienced an atmospheric warming rate of over 0.3 °C decade(−1). We examined 32 eddy covariance sites and found an unexpected net CO(2) sink during 2002 to 2020 (26 of the sites yielded a net CO(2) sink) that was four times the amount previously estimated. The CO(2) sink peaked at an altitude of roughly 4,000 m, with the sink at lower and higher altitudes limited by a low carbon use efficiency and a cold, dry climate, respectively. The fixation of CO(2) in summer is more dependent on temperature than the loss of CO(2) than it is in the winter months, especially at higher altitudes. Consistently, 16 manipulative experiments and 18 model simulations showed that the fixation of CO(2) by plants will outpace the loss of CO(2) under a wetting–warming climate until the 2090s (178 to 318 Tg C y(−1)). We therefore suggest that there is a plant-dominated negative feedback to climate warming on the Tibetan Plateau. Text permafrost PubMed Central (PMC) Proceedings of the National Academy of Sciences 118 33 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Biological Sciences |
spellingShingle |
Biological Sciences Wei, Da Qi, Yahui Ma, Yaoming Wang, Xufeng Ma, Weiqiang Gao, Tanguang Huang, Lin Zhao, Hui Zhang, Jianxin Wang, Xiaodan Plant uptake of CO(2) outpaces losses from permafrost and plant respiration on the Tibetan Plateau |
topic_facet |
Biological Sciences |
description |
High-latitude and high-altitude regions contain vast stores of permafrost carbon. Climate warming may result in the release of CO(2) from both the thawing of permafrost and accelerated autotrophic respiration, but it may also increase the fixation of CO(2) by plants, which could relieve or even offset the CO(2) losses. The Tibetan Plateau contains the largest area of alpine permafrost on Earth. However, the current status of the net CO(2) balance and feedbacks to warming remain unclear, given that the region has recently experienced an atmospheric warming rate of over 0.3 °C decade(−1). We examined 32 eddy covariance sites and found an unexpected net CO(2) sink during 2002 to 2020 (26 of the sites yielded a net CO(2) sink) that was four times the amount previously estimated. The CO(2) sink peaked at an altitude of roughly 4,000 m, with the sink at lower and higher altitudes limited by a low carbon use efficiency and a cold, dry climate, respectively. The fixation of CO(2) in summer is more dependent on temperature than the loss of CO(2) than it is in the winter months, especially at higher altitudes. Consistently, 16 manipulative experiments and 18 model simulations showed that the fixation of CO(2) by plants will outpace the loss of CO(2) under a wetting–warming climate until the 2090s (178 to 318 Tg C y(−1)). We therefore suggest that there is a plant-dominated negative feedback to climate warming on the Tibetan Plateau. |
format |
Text |
author |
Wei, Da Qi, Yahui Ma, Yaoming Wang, Xufeng Ma, Weiqiang Gao, Tanguang Huang, Lin Zhao, Hui Zhang, Jianxin Wang, Xiaodan |
author_facet |
Wei, Da Qi, Yahui Ma, Yaoming Wang, Xufeng Ma, Weiqiang Gao, Tanguang Huang, Lin Zhao, Hui Zhang, Jianxin Wang, Xiaodan |
author_sort |
Wei, Da |
title |
Plant uptake of CO(2) outpaces losses from permafrost and plant respiration on the Tibetan Plateau |
title_short |
Plant uptake of CO(2) outpaces losses from permafrost and plant respiration on the Tibetan Plateau |
title_full |
Plant uptake of CO(2) outpaces losses from permafrost and plant respiration on the Tibetan Plateau |
title_fullStr |
Plant uptake of CO(2) outpaces losses from permafrost and plant respiration on the Tibetan Plateau |
title_full_unstemmed |
Plant uptake of CO(2) outpaces losses from permafrost and plant respiration on the Tibetan Plateau |
title_sort |
plant uptake of co(2) outpaces losses from permafrost and plant respiration on the tibetan plateau |
publisher |
National Academy of Sciences |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8379928/ http://www.ncbi.nlm.nih.gov/pubmed/34373324 https://doi.org/10.1073/pnas.2015283118 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Proc Natl Acad Sci U S A |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8379928/ http://www.ncbi.nlm.nih.gov/pubmed/34373324 http://dx.doi.org/10.1073/pnas.2015283118 |
op_rights |
Copyright © 2021 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) . |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1073/pnas.2015283118 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
118 |
container_issue |
33 |
_version_ |
1766165388378243072 |