Global warming accelerates soil heterotrophic respiration
Carbon efflux from soils is the largest terrestrial carbon source to the atmosphere, yet it is still one of the most uncertain fluxes in the Earth’s carbon budget. A dominant component of this flux is heterotrophic respiration, influenced by several environmental factors, most notably soil temperatu...
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fteawag:oai:dora:eawag_31160 2023-08-15T12:40:08+02:00 Global warming accelerates soil heterotrophic respiration Nissan, Alon Alcolombri, Uria Peleg, Nadav Galili, Nir Jimenez-Martinez, Joaquin Molnar, Peter Holzner, Markus 2023 https://doi.org/10.1038/s41467-023-38981-w eng eng Springer Nature Nature Communications--Nat. Commun.--journals:2180--2041-1723 eawag:31160 doi:10.1038/s41467-023-38981-w scopus: 2-s2.0-85163073735 pmid: 37301858 journal id: journals:2180 e-issn: 2041-1723 ut: 001003866300002 Journal Article Text 2023 fteawag https://doi.org/10.1038/s41467-023-38981-w 2023-07-23T23:50:19Z Carbon efflux from soils is the largest terrestrial carbon source to the atmosphere, yet it is still one of the most uncertain fluxes in the Earth’s carbon budget. A dominant component of this flux is heterotrophic respiration, influenced by several environmental factors, most notably soil temperature and moisture. Here, we develop a mechanistic model from micro to global scale to explore how changes in soil water content and temperature affect soil heterotrophic respiration. Simulations, laboratory measurements, and field observations validate the new approach. Estimates from the model show that heterotrophic respiration has been increasing since the 1980s at a rate of about 2% per decade globally. Using future projections of surface temperature and soil moisture, the model predicts a global increase of about 40% in heterotrophic respiration by the end of the century under the worst-case emission scenario, where the Arctic region is expected to experience a more than two-fold increase, driven primarily by declining soil moisture rather than temperature increase. Article in Journal/Newspaper Arctic Global warming DORA Eawag Arctic Nature Communications 14 1 |
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Carbon efflux from soils is the largest terrestrial carbon source to the atmosphere, yet it is still one of the most uncertain fluxes in the Earth’s carbon budget. A dominant component of this flux is heterotrophic respiration, influenced by several environmental factors, most notably soil temperature and moisture. Here, we develop a mechanistic model from micro to global scale to explore how changes in soil water content and temperature affect soil heterotrophic respiration. Simulations, laboratory measurements, and field observations validate the new approach. Estimates from the model show that heterotrophic respiration has been increasing since the 1980s at a rate of about 2% per decade globally. Using future projections of surface temperature and soil moisture, the model predicts a global increase of about 40% in heterotrophic respiration by the end of the century under the worst-case emission scenario, where the Arctic region is expected to experience a more than two-fold increase, driven primarily by declining soil moisture rather than temperature increase. |
format |
Article in Journal/Newspaper |
author |
Nissan, Alon Alcolombri, Uria Peleg, Nadav Galili, Nir Jimenez-Martinez, Joaquin Molnar, Peter Holzner, Markus |
spellingShingle |
Nissan, Alon Alcolombri, Uria Peleg, Nadav Galili, Nir Jimenez-Martinez, Joaquin Molnar, Peter Holzner, Markus Global warming accelerates soil heterotrophic respiration |
author_facet |
Nissan, Alon Alcolombri, Uria Peleg, Nadav Galili, Nir Jimenez-Martinez, Joaquin Molnar, Peter Holzner, Markus |
author_sort |
Nissan, Alon |
title |
Global warming accelerates soil heterotrophic respiration |
title_short |
Global warming accelerates soil heterotrophic respiration |
title_full |
Global warming accelerates soil heterotrophic respiration |
title_fullStr |
Global warming accelerates soil heterotrophic respiration |
title_full_unstemmed |
Global warming accelerates soil heterotrophic respiration |
title_sort |
global warming accelerates soil heterotrophic respiration |
publisher |
Springer Nature |
publishDate |
2023 |
url |
https://doi.org/10.1038/s41467-023-38981-w |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Global warming |
genre_facet |
Arctic Global warming |
op_relation |
Nature Communications--Nat. Commun.--journals:2180--2041-1723 eawag:31160 doi:10.1038/s41467-023-38981-w scopus: 2-s2.0-85163073735 pmid: 37301858 journal id: journals:2180 e-issn: 2041-1723 ut: 001003866300002 |
op_doi |
https://doi.org/10.1038/s41467-023-38981-w |
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Nature Communications |
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14 |
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1 |
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1774292832983449600 |