Evaluation of effects of heat released from SOC decomposition on soil carbon stock and temperature
International audience Abstract Heat released from soil organic carbon (SOC) decomposition (referred to as microbial heat hereafter) could alter the soil's thermal and hydrological conditions, subsequently modulate SOC decomposition and its feedback with climate. While understanding this feedba...
Published in: | Global Change Biology |
---|---|
Main Authors: | , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2024
|
Subjects: | |
Online Access: | https://hal.science/hal-04630063 https://doi.org/10.1111/gcb.17391 |
id |
ftceafr:oai:HAL:hal-04630063v1 |
---|---|
record_format |
openpolar |
spelling |
ftceafr:oai:HAL:hal-04630063v1 2024-10-06T13:52:10+00:00 Evaluation of effects of heat released from SOC decomposition on soil carbon stock and temperature Huang, Ye Huang, Lin Qiu, Chunjing Ciais, Philippe East China Normal University Shangaï (ECNU) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) 2024-07 https://hal.science/hal-04630063 https://doi.org/10.1111/gcb.17391 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/gcb.17391 hal-04630063 https://hal.science/hal-04630063 doi:10.1111/gcb.17391 ISSN: 1354-1013 EISSN: 1365-2486 Global Change Biology https://hal.science/hal-04630063 Global Change Biology, 2024, 30 (7), pp.e17391. ⟨10.1111/gcb.17391⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2024 ftceafr https://doi.org/10.1111/gcb.17391 2024-09-10T01:29:15Z International audience Abstract Heat released from soil organic carbon (SOC) decomposition (referred to as microbial heat hereafter) could alter the soil's thermal and hydrological conditions, subsequently modulate SOC decomposition and its feedback with climate. While understanding this feedback is crucial for shaping policy to achieve specific climate goal, it has not been comprehensively assessed. This study employs the ORCHIDEE‐MICT model to investigate the effects of microbial heat, referred to as heating effect, focusing on their impacts on SOC accumulation, soil temperature and net primary productivity (NPP), as well as implication on land‐climate feedback under two CO 2 emissions scenarios (RCP2.6 and RCP8.5). The findings reveal that the microbial heat decreases soil carbon stock, predominantly in upper layers, and elevates soil temperatures, especially in deeper layers. This results in a marginal reduction in global SOC stocks due to accelerated SOC decomposition. Altered seasonal cycles of SOC decomposition and soil temperature are simulated, with the most significant temperature increase per unit of microbial heat (0.31 K J −1 ) occurring at around 273.15 K (median value of all grid cells where air temperature is around 273.15 K). The heating effect leads to the earlier loss of permafrost area under RCP8.5 and hinders its restoration under RCP2.6 after peak warming. Although elevated soil temperature under climate warming aligns with expectation, the anticipated accelerated SOC decomposition and large amplifying feedback on climate warming were not observed, mainly because of reduced modeled initial SOC stock and limited NPP with heating effect. These underscores the multifaceted impacts of microbial heat. Comprehensive understanding of these effects would be vital for devising effective climate change mitigation strategies in a warming world. Article in Journal/Newspaper permafrost HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Global Change Biology 30 7 |
institution |
Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Huang, Ye Huang, Lin Qiu, Chunjing Ciais, Philippe Evaluation of effects of heat released from SOC decomposition on soil carbon stock and temperature |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Abstract Heat released from soil organic carbon (SOC) decomposition (referred to as microbial heat hereafter) could alter the soil's thermal and hydrological conditions, subsequently modulate SOC decomposition and its feedback with climate. While understanding this feedback is crucial for shaping policy to achieve specific climate goal, it has not been comprehensively assessed. This study employs the ORCHIDEE‐MICT model to investigate the effects of microbial heat, referred to as heating effect, focusing on their impacts on SOC accumulation, soil temperature and net primary productivity (NPP), as well as implication on land‐climate feedback under two CO 2 emissions scenarios (RCP2.6 and RCP8.5). The findings reveal that the microbial heat decreases soil carbon stock, predominantly in upper layers, and elevates soil temperatures, especially in deeper layers. This results in a marginal reduction in global SOC stocks due to accelerated SOC decomposition. Altered seasonal cycles of SOC decomposition and soil temperature are simulated, with the most significant temperature increase per unit of microbial heat (0.31 K J −1 ) occurring at around 273.15 K (median value of all grid cells where air temperature is around 273.15 K). The heating effect leads to the earlier loss of permafrost area under RCP8.5 and hinders its restoration under RCP2.6 after peak warming. Although elevated soil temperature under climate warming aligns with expectation, the anticipated accelerated SOC decomposition and large amplifying feedback on climate warming were not observed, mainly because of reduced modeled initial SOC stock and limited NPP with heating effect. These underscores the multifaceted impacts of microbial heat. Comprehensive understanding of these effects would be vital for devising effective climate change mitigation strategies in a warming world. |
author2 |
East China Normal University Shangaï (ECNU) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
format |
Article in Journal/Newspaper |
author |
Huang, Ye Huang, Lin Qiu, Chunjing Ciais, Philippe |
author_facet |
Huang, Ye Huang, Lin Qiu, Chunjing Ciais, Philippe |
author_sort |
Huang, Ye |
title |
Evaluation of effects of heat released from SOC decomposition on soil carbon stock and temperature |
title_short |
Evaluation of effects of heat released from SOC decomposition on soil carbon stock and temperature |
title_full |
Evaluation of effects of heat released from SOC decomposition on soil carbon stock and temperature |
title_fullStr |
Evaluation of effects of heat released from SOC decomposition on soil carbon stock and temperature |
title_full_unstemmed |
Evaluation of effects of heat released from SOC decomposition on soil carbon stock and temperature |
title_sort |
evaluation of effects of heat released from soc decomposition on soil carbon stock and temperature |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04630063 https://doi.org/10.1111/gcb.17391 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
ISSN: 1354-1013 EISSN: 1365-2486 Global Change Biology https://hal.science/hal-04630063 Global Change Biology, 2024, 30 (7), pp.e17391. ⟨10.1111/gcb.17391⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/gcb.17391 hal-04630063 https://hal.science/hal-04630063 doi:10.1111/gcb.17391 |
op_doi |
https://doi.org/10.1111/gcb.17391 |
container_title |
Global Change Biology |
container_volume |
30 |
container_issue |
7 |
_version_ |
1812180494896332800 |