Unraveling the response of the apparent temperature sensitivity of ecosystem respiration to rising temperature
Global warming is expected to intensify carbon loss, as ecosystem respiration (RECO) rates increase exponentially with rising temperatures. However, a comprehensive analysis of the response of the apparent temperature sensitivity of RECO ( ${Q_{10}}$ ) to rising temperature is lacking. This study le...
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IOP Publishing
2025-01-01
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| Series: | Environmental Research Letters |
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| Online Access: | https://doi.org/10.1088/1748-9326/adad00 |
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| author | Zhentao Liu Junguo Liu Deliang Chen |
| author_facet | Zhentao Liu Junguo Liu Deliang Chen |
| author_sort | Zhentao Liu |
| collection | DOAJ |
| description | Global warming is expected to intensify carbon loss, as ecosystem respiration (RECO) rates increase exponentially with rising temperatures. However, a comprehensive analysis of the response of the apparent temperature sensitivity of RECO ( ${Q_{10}}$ ) to rising temperature is lacking. This study leverages observational data from 254 sites from the FLUXNET2015 and AmeriFlux datasets to address this knowledge gap. We found a strong influence of non-temperature factors on the seasonality of RECO. The similar seasonality of this effect and temperature can lead to underestimating or overestimating ${Q_{10}}$ . In this study, ${Q_{10}}$ was quantified using a temporal moving window and a linear-mixed effect model to account for the effects of non-temperature factors on RECO. Our results show that ${Q_{10}}$ decreases from 1.55 ± 0.24 (mean ± one standard error) at 5 °C to 1.35 ± 0.18 at 25 °C over all sites. The mean slope of ${Q_{10}}$ to temperature across all sites is about −0.02 °C ^−1 . In this study, we found lower values of Q _10 and a lower decreasing rate of Q _10 with rising temperature compared to previous studies. Our study suggests that ${Q_{10}}$ might be systematically overestimated due to the confounding effect of non-temperature factors, potentially leading to overestimated simulation of RECO rate. Our study also emphasizes the necessity of developing a process-based model, rather than simply incorporating the influences of non-temperature factors into ${Q_{10}}$ . |
| format | Article |
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| institution | Kabale University |
| issn | 1748-9326 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | Environmental Research Letters |
| spelling | doaj-art-3bceea1fc3dc4f00b6ce3dd4e67531972025-02-11T08:22:25ZengIOP PublishingEnvironmental Research Letters1748-93262025-01-0120303400810.1088/1748-9326/adad00Unraveling the response of the apparent temperature sensitivity of ecosystem respiration to rising temperatureZhentao Liu0https://orcid.org/0009-0008-2339-765XJunguo Liu1Deliang Chen2https://orcid.org/0000-0003-0288-5618School of Environmental Science and Engineering, Southern University of Science and Technology , Shenzhen 518055, People’s Republic of ChinaSchool of Environmental Science and Engineering, Southern University of Science and Technology , Shenzhen 518055, People’s Republic of China; Yellow River Research Institute, North China University of Water Resource and Electric Power , Zhengzhou 450046, People’s Republic of China; Henan Provincial Key Laboratory of Hydrosphere and Watershed Water Security, North China University of Water Resource and Electric Power , Zhengzhou 450046, People’s Republic of ChinaDepartment of Earth System Sciences, Tsinghua University , Beijing 100084, People’s Republic of China; Department of Earth Sciences, University of Gothenburg , S-40530 Gothenburg, SwedenGlobal warming is expected to intensify carbon loss, as ecosystem respiration (RECO) rates increase exponentially with rising temperatures. However, a comprehensive analysis of the response of the apparent temperature sensitivity of RECO ( ${Q_{10}}$ ) to rising temperature is lacking. This study leverages observational data from 254 sites from the FLUXNET2015 and AmeriFlux datasets to address this knowledge gap. We found a strong influence of non-temperature factors on the seasonality of RECO. The similar seasonality of this effect and temperature can lead to underestimating or overestimating ${Q_{10}}$ . In this study, ${Q_{10}}$ was quantified using a temporal moving window and a linear-mixed effect model to account for the effects of non-temperature factors on RECO. Our results show that ${Q_{10}}$ decreases from 1.55 ± 0.24 (mean ± one standard error) at 5 °C to 1.35 ± 0.18 at 25 °C over all sites. The mean slope of ${Q_{10}}$ to temperature across all sites is about −0.02 °C ^−1 . In this study, we found lower values of Q _10 and a lower decreasing rate of Q _10 with rising temperature compared to previous studies. Our study suggests that ${Q_{10}}$ might be systematically overestimated due to the confounding effect of non-temperature factors, potentially leading to overestimated simulation of RECO rate. Our study also emphasizes the necessity of developing a process-based model, rather than simply incorporating the influences of non-temperature factors into ${Q_{10}}$ .https://doi.org/10.1088/1748-9326/adad00ecosystem respirationrising temperatureshort-term warmingnon-temperature factorsseasonality |
| spellingShingle | Zhentao Liu Junguo Liu Deliang Chen Unraveling the response of the apparent temperature sensitivity of ecosystem respiration to rising temperature Environmental Research Letters ecosystem respiration rising temperature short-term warming non-temperature factors seasonality |
| title | Unraveling the response of the apparent temperature sensitivity of ecosystem respiration to rising temperature |
| title_full | Unraveling the response of the apparent temperature sensitivity of ecosystem respiration to rising temperature |
| title_fullStr | Unraveling the response of the apparent temperature sensitivity of ecosystem respiration to rising temperature |
| title_full_unstemmed | Unraveling the response of the apparent temperature sensitivity of ecosystem respiration to rising temperature |
| title_short | Unraveling the response of the apparent temperature sensitivity of ecosystem respiration to rising temperature |
| title_sort | unraveling the response of the apparent temperature sensitivity of ecosystem respiration to rising temperature |
| topic | ecosystem respiration rising temperature short-term warming non-temperature factors seasonality |
| url | https://doi.org/10.1088/1748-9326/adad00 |
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