Please use this identifier to cite or link to this item:
http://hdl.handle.net/2067/43340
Title: | Substantial hysteresis in emergent temperature sensitivity of global wetland CH4 emissions | Authors: | Chang, K.-Y. Riley, W. J. Knox, S. H. Jackson, R. B. McNicol, G. Poulter, B. Aurela, M. Baldocchi, D. Bansal, S. Bohrer, G. Campbell, D. I. Cescatti, A. Chu, H. Delwiche, K. B. Desai, A. R. Euskirchen, E. Friborg, T. Goeckede, M. Helbig, M. Hemes, K. S. Hirano, T. Iwata, H. Kang, M. Keenan, T. Krauss, K. W. Lohila, A. Mammarella, I. Mitra, B. Miyata, A. Nilsson, M. B. Noormets, A. Oechel, W. C. Papale, D. Peichl, M. Reba, M. L. Rinne, J. Runkle, B. R. K. Ryu, Y. Sachs, T. Schäfer, K. V. R. Schmid, H. P. Shurpali, N. Sonnentag, O. Tang, A. C. I. Torn, M. S. Trotta, C. Tuittila, E.-S. Ueyama, M. Vargas, R. Vesala, T. Windham-Myers, L. Zhang, Z. Zona, D. |
Journal: | NATURE COMMUNICATIONS | Issue Date: | 2021 | Abstract: | Wetland methane (CH4) emissions (FCH4 ) are important in global carbon budgets and climate change assessments. Currently, FCH4 projections rely on prescribed static temperature sensitivity that varies among biogeochemical models. Meta-analyses have proposed a consistent FCH4 temperature dependence across spatial scales for use in models; however, sitelevel studies demonstrate that FCH4 are often controlled by factors beyond temperature. Here, we evaluate the relationship between FCH4 and temperature using observations from the FLUXNET-CH4 database. Measurements collected across the globe show substantial seasonal hysteresis between FCH4 and temperature, suggesting larger FCH4 sensitivity to temperature later in the frost-free season (about 77% of site-years). Results derived from a machine-learning model and several regression models highlight the importance of representing the large spatial and temporal variability within site-years and ecosystem types. Mechanistic advancements in biogeochemical model parameterization and detailed measurements in factors modulating CH4 production are thus needed to improve global CH4 budget assessments. |
URI: | http://hdl.handle.net/2067/43340 | ISSN: | 2041-1723 | DOI: | 10.1038/s41467-021-22452-1 | Rights: | Attribution 3.0 United States |
Appears in Collections: | A1. Articolo in rivista |
Files in This Item:
File | Description | Size | Format | Existing users please |
---|---|---|---|---|
Kuang-Yu 21 NatCom.pdf | 2.58 MB | Adobe PDF | Request a copy |
Page view(s)
85
Last Week
0
0
Last month
2
2
checked on Apr 17, 2024
Download(s)
4
checked on Apr 17, 2024
Google ScholarTM
Check
Altmetric
This item is licensed under a Creative Commons License