Substantial hysteresis in emergent temperature sensitivity of global wetland CH4 emissions

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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.

Detaljer

Författare
  • Kuang Yu Chang
  • William J. Riley
  • Sara H. Knox
  • Robert B. Jackson
  • Gavin McNicol
  • Benjamin Poulter
  • Mika Aurela
  • Dennis Baldocchi
  • Sheel Bansal
  • Gil Bohrer
  • David I. Campbell
  • Alessandro Cescatti
  • Housen Chu
  • Kyle B. Delwiche
  • Ankur R. Desai
  • Eugenie Euskirchen
  • Thomas Friborg
  • Mathias Goeckede
  • Manuel Helbig
  • Kyle S. Hemes
  • Takashi Hirano
  • Hiroki Iwata
  • Minseok Kang
  • Trevor Keenan
  • Ken W. Krauss
  • Annalea Lohila
  • Ivan Mammarella
  • Bhaskar Mitra
  • Akira Miyata
  • Mats B. Nilsson
  • Asko Noormets
  • Walter C. Oechel
  • Dario Papale
  • Matthias Peichl
  • Michele L. Reba
  • Benjamin R.K. Runkle
  • Youngryel Ryu
  • Torsten Sachs
  • Karina V.R. Schäfer
  • Hans Peter Schmid
  • Narasinha Shurpali
  • Angela C.I. Tang
  • Margaret S. Torn
  • Carlo Trotta
  • Eeva Stiina Tuittila
  • Masahito Ueyama
  • Rodrigo Vargas
  • Timo Vesala
  • Lisamarie Windham-Myers
  • Zhen Zhang
  • Donatella Zona
Enheter & grupper
Externa organisationer
  • Lawrence Berkeley National Laboratory
  • University of British Columbia
  • Stanford University
  • National Aeronautics and Space Administration
  • Finnish Meteorological Institute
  • University of California, Berkeley
  • United States Geological Survey
  • Ohio State University
  • University of Waikato
  • European Commission Joint Research Centre, Brussels
  • University of Wisconsin-Madison
  • University of Alaska Fairbanks
  • University of Copenhagen
  • Max Planck Institute for Biogeochemistry
  • McMaster University
  • Hokkaido University
  • Shinshu University
  • University of Helsinki
  • Texas A and M University
  • National Agriculture and Food Research Organization (NARO)
  • Swedish University of Agricultural Sciences
  • San Diego State University
  • University of Tuscia
  • United States Department of Agriculture (USDA)
  • University of Arkansas - Fayetteville
  • GFZ German Research Centre for Geosciences
  • Rutgers University-Newark Campus
  • Karlsruhe Institute of Technology
  • Natural Resources Institute Finland (Luke)
  • University of Eastern Finland
  • University of Delaware
  • U.S. Geological Survey
  • Seoul National University
  • United States Geological Survey: National Wetlands Research Center
  • Laval University
  • Sarawak Tropical Peat Research Institute
  • Osaka University
  • University of Maryland
  • University of Sheffield
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Naturgeografi
  • Klimatforskning
Originalspråkengelska
Sidor (från-till)2266
Antal sidor1
TidskriftNature Communications
Volym12
Utgåva nummer1
StatusPublished - 2021 apr 15
PublikationskategoriForskning
Peer review utfördJa

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