The impact of permafrost thawing on the carbon dynamics of tundra
International audience There is debate on the potential release of the tundra's immense carbon stocks into the atmosphere in response to global warming. We present here results obtained with a model of CO 2 exchanges, coupled to a model of the soil thermal and hydrological regime in the tundra....
Published in: | Geophysical Research Letters |
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Main Authors: | , , , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
1997
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Subjects: | |
Online Access: | https://hal.science/hal-02916149 https://hal.science/hal-02916149v1/document https://hal.science/hal-02916149v1/file/97GL00071.pdf https://doi.org/10.1029/97GL00071 |
Summary: | International audience There is debate on the potential release of the tundra's immense carbon stocks into the atmosphere in response to global warming. We present here results obtained with a model of CO 2 exchanges, coupled to a model of the soil thermal and hydrological regime in the tundra. We show that, because of the partial thawing of permafrost and subsequent increase in nutrient availability, the ecosystem's response to warming may be a long-lasting increase in C accumulation, following a temporary increase in CO 2 emissions. Our study also provides a consistent picture of CO 2 exchanges in tundra ecosystems, reconciling the short-term experimental response to warming, recent field measurements, and Holocene C accumulation estimates. |
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