Substantial hysteresis in emergent temperature sensitivity of global wetland CH4 emissions

Research output: Contribution to journalArticle


title = "Substantial hysteresis in emergent temperature sensitivity of global wetland CH4 emissions",
abstract = "Wetland methane (CH4) emissions ([Formula: see text]) are important in global carbon budgets and climate change assessments. Currently, [Formula: see text] projections rely on prescribed static temperature sensitivity that varies among biogeochemical models. Meta-analyses have proposed a consistent [Formula: see text] temperature dependence across spatial scales for use in models; however, site-level studies demonstrate that [Formula: see text] are often controlled by factors beyond temperature. Here, we evaluate the relationship between [Formula: see text] and temperature using observations from the FLUXNET-CH4 database. Measurements collected across the globe show substantial seasonal hysteresis between [Formula: see text] and temperature, suggesting larger [Formula: see text] 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.",
author = "Chang, {Kuang Yu} and Riley, {William J.} and Knox, {Sara H.} and Jackson, {Robert B.} and Gavin McNicol and Benjamin Poulter and Mika Aurela and Dennis Baldocchi and Sheel Bansal and Gil Bohrer and Campbell, {David I.} and Alessandro Cescatti and Housen Chu and Delwiche, {Kyle B.} and Desai, {Ankur R.} and Eugenie Euskirchen and Thomas Friborg and Mathias Goeckede and Manuel Helbig and Hemes, {Kyle S.} and Takashi Hirano and Hiroki Iwata and Minseok Kang and Trevor Keenan and Krauss, {Ken W.} and Annalea Lohila and Ivan Mammarella and Bhaskar Mitra and Akira Miyata and Nilsson, {Mats B.} and Asko Noormets and Oechel, {Walter C.} and Dario Papale and Matthias Peichl and Reba, {Michele L.} and Janne Rinne and Runkle, {Benjamin R.K.} and Youngryel Ryu and Torsten Sachs and Sch{\"a}fer, {Karina V.R.} and Schmid, {Hans Peter} and Narasinha Shurpali and Oliver Sonnentag and Tang, {Angela C.I.} and Torn, {Margaret S.} and Carlo Trotta and Tuittila, {Eeva Stiina} and Masahito Ueyama and Rodrigo Vargas and Timo Vesala and Lisamarie Windham-Myers and Zhen Zhang and Donatella Zona",
year = "2021",
month = apr,
day = "15",
doi = "10.1038/s41467-021-22452-1",
language = "English",
volume = "12",
pages = "2266",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",