Modeling Global Soil Carbon and Soil Microbial Carbon by Integrating Microbial Processes into the Ecosystem Process Model TRIPLEX-GHG
Microbial physiology plays a critical role in the biogeochemical cycles of the Earth system. However, most traditional soil carbon models are lacking in terms of the representation of key microbial processes that control the soil carbon response to global climate change. In this study, the improved...
Published in: | Journal of Advances in Modeling Earth Systems |
---|---|
Main Authors: | , , , , , , |
Language: | unknown |
Published: |
2021
|
Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/1409257 https://www.osti.gov/biblio/1409257 https://doi.org/10.1002/2017MS000920 |
id |
ftosti:oai:osti.gov:1409257 |
---|---|
record_format |
openpolar |
spelling |
ftosti:oai:osti.gov:1409257 2023-07-30T04:07:21+02:00 Modeling Global Soil Carbon and Soil Microbial Carbon by Integrating Microbial Processes into the Ecosystem Process Model TRIPLEX-GHG Wang, Kefeng Peng, Changhui Zhu, Qiuan Zhou, Xiaolu Wang, Meng Zhang, Kerou Wang, Gangsheng 2021-12-31 application/pdf http://www.osti.gov/servlets/purl/1409257 https://www.osti.gov/biblio/1409257 https://doi.org/10.1002/2017MS000920 unknown http://www.osti.gov/servlets/purl/1409257 https://www.osti.gov/biblio/1409257 https://doi.org/10.1002/2017MS000920 doi:10.1002/2017MS000920 54 ENVIRONMENTAL SCIENCES 2021 ftosti https://doi.org/10.1002/2017MS000920 2023-07-11T09:22:50Z Microbial physiology plays a critical role in the biogeochemical cycles of the Earth system. However, most traditional soil carbon models are lacking in terms of the representation of key microbial processes that control the soil carbon response to global climate change. In this study, the improved process-based model TRIPLEX-GHG was developed by coupling it with the new MEND (Microbial-ENzyme-mediated Decomposition) model to estimate total global soil organic carbon (SOC) and global soil microbial carbon. The new model (TRIPLEX-MICROBE) shows considerable improvement over the previous version (TRIPLEX-GHG) in simulating SOC. We estimated the global soil carbon stock to be approximately 1195 Pg C, with 348 Pg C located in the high northern latitudes, which is in good agreement with the well-regarded Harmonized World Soil Database (HWSD) and the Northern Circumpolar Soil Carbon Database (NCSCD). We also estimated the global soil microbial carbon to be 21 Pg C, similar to the 23 Pg C estimated. We found that the microbial carbon quantity in the latitudinal direction showed reversions at approximately 30°N, near the equator and at 25°S. A sensitivity analysis suggested that the tundra ecosystem exhibited the highest sensitivity to a 1°C increase or decrease in temperature in terms of dissolved organic carbon (DOC), microbial biomass carbon (MBC) and mineral-associated organic carbon (MOC). Furthermore, our work represents the first step towards a new generation of ecosystem process models capable of integrating key microbial processes into soil carbon cycles. Other/Unknown Material Tundra SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Journal of Advances in Modeling Earth Systems 9 6 2368 2384 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Wang, Kefeng Peng, Changhui Zhu, Qiuan Zhou, Xiaolu Wang, Meng Zhang, Kerou Wang, Gangsheng Modeling Global Soil Carbon and Soil Microbial Carbon by Integrating Microbial Processes into the Ecosystem Process Model TRIPLEX-GHG |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Microbial physiology plays a critical role in the biogeochemical cycles of the Earth system. However, most traditional soil carbon models are lacking in terms of the representation of key microbial processes that control the soil carbon response to global climate change. In this study, the improved process-based model TRIPLEX-GHG was developed by coupling it with the new MEND (Microbial-ENzyme-mediated Decomposition) model to estimate total global soil organic carbon (SOC) and global soil microbial carbon. The new model (TRIPLEX-MICROBE) shows considerable improvement over the previous version (TRIPLEX-GHG) in simulating SOC. We estimated the global soil carbon stock to be approximately 1195 Pg C, with 348 Pg C located in the high northern latitudes, which is in good agreement with the well-regarded Harmonized World Soil Database (HWSD) and the Northern Circumpolar Soil Carbon Database (NCSCD). We also estimated the global soil microbial carbon to be 21 Pg C, similar to the 23 Pg C estimated. We found that the microbial carbon quantity in the latitudinal direction showed reversions at approximately 30°N, near the equator and at 25°S. A sensitivity analysis suggested that the tundra ecosystem exhibited the highest sensitivity to a 1°C increase or decrease in temperature in terms of dissolved organic carbon (DOC), microbial biomass carbon (MBC) and mineral-associated organic carbon (MOC). Furthermore, our work represents the first step towards a new generation of ecosystem process models capable of integrating key microbial processes into soil carbon cycles. |
author |
Wang, Kefeng Peng, Changhui Zhu, Qiuan Zhou, Xiaolu Wang, Meng Zhang, Kerou Wang, Gangsheng |
author_facet |
Wang, Kefeng Peng, Changhui Zhu, Qiuan Zhou, Xiaolu Wang, Meng Zhang, Kerou Wang, Gangsheng |
author_sort |
Wang, Kefeng |
title |
Modeling Global Soil Carbon and Soil Microbial Carbon by Integrating Microbial Processes into the Ecosystem Process Model TRIPLEX-GHG |
title_short |
Modeling Global Soil Carbon and Soil Microbial Carbon by Integrating Microbial Processes into the Ecosystem Process Model TRIPLEX-GHG |
title_full |
Modeling Global Soil Carbon and Soil Microbial Carbon by Integrating Microbial Processes into the Ecosystem Process Model TRIPLEX-GHG |
title_fullStr |
Modeling Global Soil Carbon and Soil Microbial Carbon by Integrating Microbial Processes into the Ecosystem Process Model TRIPLEX-GHG |
title_full_unstemmed |
Modeling Global Soil Carbon and Soil Microbial Carbon by Integrating Microbial Processes into the Ecosystem Process Model TRIPLEX-GHG |
title_sort |
modeling global soil carbon and soil microbial carbon by integrating microbial processes into the ecosystem process model triplex-ghg |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1409257 https://www.osti.gov/biblio/1409257 https://doi.org/10.1002/2017MS000920 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
http://www.osti.gov/servlets/purl/1409257 https://www.osti.gov/biblio/1409257 https://doi.org/10.1002/2017MS000920 doi:10.1002/2017MS000920 |
op_doi |
https://doi.org/10.1002/2017MS000920 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
9 |
container_issue |
6 |
container_start_page |
2368 |
op_container_end_page |
2384 |
_version_ |
1772820604927344640 |