Interannual fires as a source for subarctic summer decadal climate variability mediated by permafrost thawing
Climate model simulations run under the Coupled Model Intercomparison Project Phase 6 (CMIP6) use an inhomogeneous biomass burning aerosol (BBA) emission dataset, which exhibits pronounced interannual variability from 1997-2014 due to the infusion of satellite data. Using the Community Earth System...
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Online Access: | https://doi.org/10.1038/s41612-023-00415-1 |
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ftncar:oai:drupal-site.org:articles_26485 2024-06-23T07:56:06+00:00 Interannual fires as a source for subarctic summer decadal climate variability mediated by permafrost thawing Kim, Ji-Eun (author) Yamaguchi, Ryohei (author) Rodgers, Keith B. (author) Timmermann, Axel (author) Lee, Sun-Seon (author) Stein, Karl (author) Danabasoglu, Gokhan (author) Lamarque, Jean-Francois (author) Fasullo, John T. (author) Deser, Clara (author) Rosenbloom, Nan (author) Edwards, Jim (author) Stuecker, Malte F. (author) 2023-07-10 https://doi.org/10.1038/s41612-023-00415-1 en eng npj Climate and Atmospheric Science--npj Clim Atmos Sci--2397-3722 articles:26485 doi:10.1038/s41612-023-00415-1 ark:/85065/d78s4tx3 Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. article Text 2023 ftncar https://doi.org/10.1038/s41612-023-00415-1 2024-05-27T14:15:41Z Climate model simulations run under the Coupled Model Intercomparison Project Phase 6 (CMIP6) use an inhomogeneous biomass burning aerosol (BBA) emission dataset, which exhibits pronounced interannual variability from 1997-2014 due to the infusion of satellite data. Using the Community Earth System Model version 2 Large Ensemble (CESM2-LE) with original and smoothed CMIP6 BBA forcings, we show that the CMIP6 data inhomogeneity causes spurious decadal subarctic land warming. During years with reduced aerosol concentrations, increased solar radiation can trigger abrupt subarctic permafrost thawing, increased soil water drainage, upper soil drying, and subsequent surface warming. This slow process, which is further amplified by nonlinear cloud-aerosol interactions, cannot be completely offset during years of increased aerosol fluxes, thereby reddening surface temperature spectra in response to large-amplitude interannual aerosol forcing. More generally, our CESM2 experiments identify a pathway for generating decadal variability in high latitudes, involving interannual shortwave forcing and slow nonlinear soil responses. 1852977 1947282 DE-SC0022070 Article in Journal/Newspaper permafrost Subarctic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) npj Climate and Atmospheric Science 6 1 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Climate model simulations run under the Coupled Model Intercomparison Project Phase 6 (CMIP6) use an inhomogeneous biomass burning aerosol (BBA) emission dataset, which exhibits pronounced interannual variability from 1997-2014 due to the infusion of satellite data. Using the Community Earth System Model version 2 Large Ensemble (CESM2-LE) with original and smoothed CMIP6 BBA forcings, we show that the CMIP6 data inhomogeneity causes spurious decadal subarctic land warming. During years with reduced aerosol concentrations, increased solar radiation can trigger abrupt subarctic permafrost thawing, increased soil water drainage, upper soil drying, and subsequent surface warming. This slow process, which is further amplified by nonlinear cloud-aerosol interactions, cannot be completely offset during years of increased aerosol fluxes, thereby reddening surface temperature spectra in response to large-amplitude interannual aerosol forcing. More generally, our CESM2 experiments identify a pathway for generating decadal variability in high latitudes, involving interannual shortwave forcing and slow nonlinear soil responses. 1852977 1947282 DE-SC0022070 |
author2 |
Kim, Ji-Eun (author) Yamaguchi, Ryohei (author) Rodgers, Keith B. (author) Timmermann, Axel (author) Lee, Sun-Seon (author) Stein, Karl (author) Danabasoglu, Gokhan (author) Lamarque, Jean-Francois (author) Fasullo, John T. (author) Deser, Clara (author) Rosenbloom, Nan (author) Edwards, Jim (author) Stuecker, Malte F. (author) |
format |
Article in Journal/Newspaper |
title |
Interannual fires as a source for subarctic summer decadal climate variability mediated by permafrost thawing |
spellingShingle |
Interannual fires as a source for subarctic summer decadal climate variability mediated by permafrost thawing |
title_short |
Interannual fires as a source for subarctic summer decadal climate variability mediated by permafrost thawing |
title_full |
Interannual fires as a source for subarctic summer decadal climate variability mediated by permafrost thawing |
title_fullStr |
Interannual fires as a source for subarctic summer decadal climate variability mediated by permafrost thawing |
title_full_unstemmed |
Interannual fires as a source for subarctic summer decadal climate variability mediated by permafrost thawing |
title_sort |
interannual fires as a source for subarctic summer decadal climate variability mediated by permafrost thawing |
publishDate |
2023 |
url |
https://doi.org/10.1038/s41612-023-00415-1 |
genre |
permafrost Subarctic |
genre_facet |
permafrost Subarctic |
op_relation |
npj Climate and Atmospheric Science--npj Clim Atmos Sci--2397-3722 articles:26485 doi:10.1038/s41612-023-00415-1 ark:/85065/d78s4tx3 |
op_rights |
Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
op_doi |
https://doi.org/10.1038/s41612-023-00415-1 |
container_title |
npj Climate and Atmospheric Science |
container_volume |
6 |
container_issue |
1 |
_version_ |
1802648985091964928 |