Preprints
https://doi.org/10.5194/essd-2020-307
https://doi.org/10.5194/essd-2020-307

  18 Jan 2021

18 Jan 2021

Review status: this preprint is currently under review for the journal ESSD.

FLUXNET-CH4: A global, multi-ecosystem dataset and analysis of methane seasonality from freshwater wetlands

Kyle B. Delwiche1, Sara Helen Knox2, Avni Malhotra1, Etienne Fluet-Chouinard1, Gavin McNicol1, Sarah Feron1,3, Zutao Ouyang1, Dario Papale4,5, Carlo Trotta5, Eleonora Canfora5, You-Wei Cheah6, Danielle Christianson6, M. Carmelita R. Alberto7, Pavel Alekseychik8, Mika Aurela9, Dennis Baldocchi10, Sheel Bansal11, David P. Billesbach12, Gil Bohrer13, Rosvel Bracho14, Nina Buchmann15, David I. Campbell16, Gerardo Celis17, Jiquan Chen18, Weinan Chen19, Housen Chu20, Higo J. Dalmagro21, Sigrid Dengel6, Ankur R. Desai22, Matteo Detto23, Han Dolman24, Elke Eichelmann25, Eugenie Euskirchen26, Daniela Famulari27, Thomas Friborg28, Kathrin Fuchs29, Mathias Goeckede30, Sébastien Gogo31, Mangaliso J. Gondwe32, Jordan P. Goodrich16, Pia Gottschalk33, Scott L. Graham34, Martin Heimann30, Manuel Helbig35,36, Carole Helfter37, Kyle S. Hemes10,38, Takashi Hirano39, David Hollinger40, Lukas Hörtnagl15, Hiroki Iwata41, Adrien Jacotot31, Joachim Jansen42, Gerald Jurasinski43, Minseok Kang44, Kuno Kasak45, John King46, Janina Klatt47, Franziska Koebsch43, Ken W. Krauss48, Derrick Y. F. Lai49, Ivan Mammarella50, Giovanni Manca51, Luca Belelli Marchesini52, Jaclyn Hatala Matthes53, Trofim Maximon54, Lutz Merbold55, Bhaskar Mitra56, Timothy H. Morin57, Eiko Nemitz37, Mats B. Nilsson58, Shuli Niu19, Walter C. Oechel59, Patricia Y. Oikawa60, Keisuke Ono61, Matthias Peichl58, Olli Peltola9, Michele L. Reba62, Andrew D. Richardson63,64, William Riley6, Benjamin R. K. Runkle65, Youngryel Ryu66, Torsten Sachs33, Ayaka Sakabe67, Camilo Rey Sanchez10, Edward A. Schuur68, Karina V. R. Schäfer69, Oliver Sonnentag70, Jed P. Sparks71, Ellen Stuart-Haëntjens72, Cove Sturtevant73, Ryan C. Sullivan74, Daphne J. Szutu10, Jonathan E. Thom75, Margaret S. Torn6, Eeva-Stiina Tuittila76, Jessica Turner77, Masahito Ueyama78, Alex C. Valach10, Rodrigo Vargas79, Andrej Varlagin80, Alma Vazquez-Lule79, Joseph G. Verfaillie10, Timo Vesala50, George L. Vourlitis81, Eric J. Ward48, Christian Wille33, Georg Wohlfahrt82, Guan Xhuan Wong83, Zhen Zhang84, Donatella Zona59,85, Lisamarie Windham-Myers86, Benjamin Poulter87, and Robert B. Jackson1,38,88 Kyle B. Delwiche et al.
  • 1Department of Earth System Science, Stanford University, Stanford, California
  • 2Department of Geography, The University of British Columbia, Vancouver, British Columbia, Canada
  • 3Department of Physics, University of Santiago de Chile, Santiago, Chile
  • 4Dipartimento per la Innovazione nei Sistemi Biologici, Agroalimentari e Forestali, Università degli Studi della Tuscia, Largo dell'Universita, Viterbo, Italy e Forestali, Universita
  • 5euroMediterranean Center on Climate Change CMCC, Lecce, Italy
  • 6Earth and Environmental Sciences Area, Lawrence Berkeley National Lab, Berkeley, California
  • 7International Rice Research Institute
  • 8Natural Resources Institute Finland (LUKE), Helsinki, Finland
  • 9Finnish Meteorological Institute, PO Box 501, 00101 Helsinki, Finland
  • 10Department of Environmental Science, Policy and Management, University of California, Berkeley, CA, USA
  • 11U.S. Geological Survey, Northern Prairie Wildlife Research Center, 8711 37th St Southeast, Jamestown, ND 58401 USA
  • 12University of Nebraska-Lincoln, Department of Biological Systems Engineering, Lincoln, NE 68583, USA
  • 13Department of Civil, Environmental & Geodetic Engineering, Ohio State University
  • 14School of Forest Resources and Conservation, University of Florida, Gainesville FL, 32611
  • 15Department of Environmental Systems Science, Institute of Agricultural Sciences, ETH Zurich, 8092 Zurich, Switzerland
  • 16School of Science, University of Waikato, Hamilton, New Zealand
  • 17Agronomy Department, University of Florida, Gainesville FL, 32601
  • 18Department of Geography, Michigan State University
  • 19Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China
  • 20Climate and Ecosystem Sciences Division, Lawrence Berkeley National Lab, Berkeley, CA 94702, USA
  • 21Universidade de Cuiaba, Cuiaba, Mato Grosso, Brazil
  • 22Dept of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI 53706 USA
  • 23Department of Ecology and Evolutionary Biology, Princeton University, Princeton NJ, USA
  • 24Department of Earth Sciences, Vrije Universiteit, Amsterdam, Netherlands
  • 25School of Biology and Environmental Science, University College Dublin, Ireland
  • 26University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, AK, USA
  • 27C NR - institute for Mediterranean Agricultural and Forest Systems, Piazzale Enrico Fermi, 1 Portici (Napoli) Italy
  • 28University of Copenhagen, Department of Geosciences and Natural Resource Management
  • 29Institute of Meteorology and Climate Research - Atmos. Environ. al Research, Karlsruhe Institute of Technology (KIT Campus Alpin), 82467 Garmisch-Partenkirchen, Germany
  • 30Max Planck Institute for Biogeochemistry, Jena, Germany
  • 31ISTO, Université d’Orléans, CNRS, BRGM, UMR 7327, 45071, Orléans, France
  • 32Okavango Research Institute, University of Botswana, Maun, Botswana
  • 33GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany
  • 34Manaaki Whenua - Landcare Research, Lincoln, NZ
  • 35Université de Montréal, Département de géographie, Université de Montréal, Montréal, QC H2V 0B3
  • 36Canada & Dalhousie University, Department of Physics and Atmospheric Science, Halifax, NS B2Y 1P3, Canada
  • 37UK Centre for Ecology and Hydrology, Edinburgh, UK
  • 38Woods Institute for the Environment, Stanford University, Stanford, California
  • 39Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
  • 40Northern Research Station, USDA Forest Service, Durham, NH 03824, USA
  • 41Department of Environmental Science, Faculty of Science, Shinshu University
  • 42Stockholm University, Department of Geological Sciences
  • 43University of Rostock, Rostock, Germany
  • 44National Center for Agro Meteorology, Seoul, South Korea
  • 45Department of Geography, University of Tartu, Vanemuise st 46, Tartu, 51410, Estonia
  • 46Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC, USA
  • 47Vegetation Ecology, Institute of Ecology and Landscape, Department Landscape Architecture, Weihenstephan-Triesdorf University of Applied Sciences, Am Hofgarten 1, 85354 Freising, Germany
  • 48USGS Wetland and Aquatic Research Center, Lafayette LA
  • 49Department of Geography and Resource Management, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
  • 50Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland
  • 51European Commission, Joint Research Centre (JRC), Ispra, Italy
  • 52Dept. of Sustainable Agro-Ecosystems and Bioresources, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige , Italy
  • 53Department of Biological Sciences, Wellesley College, Wellesley, MA 02481, USA
  • 54Institute for Biological Problems of the Cryolithozone, RAS, Yakutsk, REp. Yakutia
  • 55Mazingira Centre, International Livestock Research Institute (ILRI), Old Naivasha Road, PO Box 30709, 00100 Nairobi, Kenya
  • 56Northern Arizona University, School of Informatics, Computing and Cyber Systems
  • 57Environmental Resources Engineering, SUNY College of Environmental Science and Forestry
  • 58Dept. of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden
  • 59Dept. Biology, San Diego State University, San Diego, CA 92182, USA
  • 60Department of Earth and Environmental Sciences, Cal State East Bay, Hayward CA 94542 USA
  • 61National Agriculture and Food Research Organization, Tsukuba, Japan
  • 62USDA-ARS Delta Water Management Research Unit, Jonesboro, Arkansas 72401, United States
  • 63School of Informatics, Computing & Cyber Systems, Northern Arizona University, Flagstaff, AZ 86011, USA
  • 64Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ 86011, USA
  • 65Department of Biological & Agricultural Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
  • 66Department of Landscape Architecture and Rural Systems Engineering, Seoul National University, South Korea
  • 67Hakubi center, Kyoto University, Kyoto, Japan
  • 68Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, USA
  • 69Dept of Earth and Environmental Science, Rutgers University Newark, NJ
  • 70Université de Montréal, Département de géographie, Université de Montréal, Montréal, QC H2V 0B3, Canada
  • 71Department of Ecology and Evolution, Cornell
  • 72USGS California Water Science Center, 6000 J Street, Placer Hall, Sacramento, CA, 95819
  • 73National Ecological Observatory Network, Battelle, 1685 38th St Ste 100, Boulder, Colorado, 80301, USA
  • 74Environmental Science Division, Argonne National Laboratory, Lemont, IL, USA
  • 75Space Sciences and Engineering Center, University of Wisconsin-Madison, Madison, WI 53706 USA
  • 76School of Forest Sciences, University of Eastern Finland, Joesnuu, Finland
  • 77Freshwater and Marine Science, University of Wisconsin-Madison
  • 78Graduate School of Life and Environmental Sciences, Osaka Prefecture University
  • 79Department of Plant and Soil Sciences, University of Delaware, Newark, DE, USA
  • 80A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences
  • 81California State University San Marcos, San Marcos, CA, USA
  • 82University of Innsbruck, Department of Ecology, Sternwartestr. 15, 6020 Innsbruck, AUSTRIA
  • 83Sarawak Tropical Peat Research Institute, Sarawak, Malaysia
  • 84Department of Geographical Sciences, University of Maryland, College Park, MD 20740, USA
  • 85Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, United Kingdom
  • 86USGS Water Mission Area, 345 Middlefield Road, Menlo Park, CA, 94025
  • 87Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland
  • 88Precourt Institute for Energy, Stanford University, Stanford, California

Abstract. Methane (CH4) emissions from natural landscapes constitute roughly half of global CH4 contributions to the atmosphere, yet large uncertainties remain in the absolute magnitude and the seasonality of emission quantities and drivers. Eddy covariance (EC) measurements of CH4 flux are ideal for constraining ecosystem-scale CH4 emissions, including their seasonality, due to quasi-continuous and high temporal resolution of flux measurements, coincident measurements of carbon, water, and energy fluxes, lack of ecosystem disturbance, and increased availability of datasets over the last decade. Here, we 1) describe the newly published dataset, FLUXNET-CH4 Version 1.0, the first global dataset of CH4 EC measurements (available at https://fluxnet.org/data/fluxnet-ch4- community-product/). FLUXNET-CH4 includes half-hourly and daily gap-filled and non gap-filled aggregated CH4 fluxes and meteorological data from 79 sites globally: 42 freshwater wetlands, 6 brackish and saline wetlands, 7 formerly drained ecosystems, 7 rice paddy sites, 2 lakes, and 15 uplands. Then, we 2) evaluate FLUXNET-CH4 representativeness for freshwater wetland coverage globally, because the majority of sites in FLUXNET-CH4 Version 1.0 are freshwater wetlands and because freshwater wetlands are a substantial source of total atmospheric CH4 emissions; and 3) provide the first global estimates of the seasonal variability and seasonality predictors of freshwater wetland CH4 fluxes. Our representativeness analysis suggests that the freshwater wetland sites in the dataset cover global wetland bioclimatic attributes (encompassing energy, moisture, and vegetation-related parameters) in arctic, boreal, and temperate regions, but only sparsely cover humid tropical regions. Seasonality metrics of wetland CH4 emissions vary considerably across latitudinal bands. In freshwater wetlands (except those between 20° S to 20° N) the spring onset of elevated CH4 emissions starts three days earlier, and the CH4 emission season lasts 4 days longer, for each degree C increase in mean annual air temperature. On average, the onset of increasing CH4 emissions lags soil warming by one month, with very few sites experiencing increased CH4 emissions prior to the onset of soil warming. In contrast, roughly half of these sites experience the spring onset of rising CH4 emissions prior to the spring increase in gross primary productivity (GPP). The timing of peak summer CH4 emissions does not correlate with the timing for either peak summer temperature or peak GPP. Our results provide seasonality parameters for CH4 modeling, and highlight seasonality metrics that cannot be predicted by temperature or GPP (i.e., seasonality of CH4 peak). The FLUXNET-CH4 dataset provides an open-access resource for CH4 flux synthesis, has a range of applications, and is unique in that it includes coupled measurements of important CH4 drivers such as GPP and temperature. Although FLUXNET-CH4 could certainly be improved by adding more sites in tropical ecosystems and by increasing the number of site-years at existing sites, it is a powerful new resource for diagnosing and understanding the role of terrestrial ecosystems and climate drivers in the global CH4 cycle. All seasonality parameters are available at https://doi.org/10.5281/zenodo.4408468. Additionally, raw FLUXNET-CH4 data used to extract seasonality parameters can be downloaded from https://fluxnet.org/data/fluxnet-ch4-community-product/, and a complete list of the 79 individual site data DOIs is provided in Table 2 in the Data Availability section of this document.

Kyle B. Delwiche et al.

Status: open (until 18 Mar 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on essd-2020-307', Andreas Heinemeyer, 28 Jan 2021 reply
  • RC1: 'Comment on essd-2020-307', Anonymous Referee #1, 18 Feb 2021 reply
    • RC2: 'Reply on RC1', Anonymous Referee #2, 27 Feb 2021 reply

Kyle B. Delwiche et al.

Data sets

FLUXNET-CH4 AT-Neu Neustift Wohlfahrt, Georg, Albin Hammerle, and Lukas Hörtnagl https://doi.org/10.18140/FLX/1669365

FLUXNET-CH4 BR-Npw Northern Pantanal Wetland Vourlitis, George, Higo Dalmagro, Jose de S. Nogueira, Mark Johnson, and Paulo Arruda https://doi.org/10.18140/FLX/1669368

FLUXNET-CH4 BW-Gum Guma Helfter, Carole https://doi.org/10.18140/FLX/1669370

FLUXNET-CH4 BW-Nxr Nxaraga Helfter, Carole https://doi.org/10.18140/FLX/1669518

FLUXNET-CH4 CA-SCB Scotty Creek Bog Sonnentag, Oliver and Manuel Helbig https://doi.org/10.18140/FLX/1669613

FLUXNET-CH4 CA-SCC Scotty Creek Landscape Sonnentag, Oliver and Manuel Helbig https://doi.org/10.18140/FLX/1669628

FLUXNET-CH4 CH-Cha Chamau Hörtnagl, Lukas, Iris Feigenwinter, Kathrin Fuchs, Lutz Merbold, Nina Buchmann, Werner Eugster, Matthias Zeeman, Peter Pluess, Florian Käslin, Philip Meier, Patrick Koller, and Thomas Baur https://doi.org/10.18140/FLX/1669629

FLUXNET-CH4 CH-Dav Davos Hörtnagl, Lukas, Regine Maier, Werner Eugster, Nina Buchmann, Carmen Emmel, Patrick Koller, Thomas Baur, Peter Pluess, Florian Käslin, and Philip Meier https://doi.org/10.18140/FLX/1669631

FLUXNET-CH4 CN-Hgu Hongyuan Niu, Shuli and Weinan Chen https://doi.org/10.18140/FLX/1669632

FLUXNET-CH4 DE-Dgw Dagowsee Sachs, Torsten, Christian Wille, and Eric Larmanou https://doi.org/10.18140/FLX/1669633

FLUXNET-CH4 DE-Hte Huetelmoor Koebsch, Franziska and Gerald Jurasinski https://doi.org/10.18140/FLX/1669634

FLUXNET-CH4 DE-SfN Schechenfilz Nord Klatt, Janina, Hans Peter Schmid, Matthias Mauder, and Rainer Steinbrecher https://doi.org/10.18140/FLX/1669635

FLUXNET-CH4 DE-Zrk Zarnekow Sachs, Torsten, Christian Wille, Eric Larmanou, and Daniela Franz https://doi.org/10.18140/FLX/1669636

FLUXNET-CH4 FI-Hyy Hyytiala Mammarella, Ivan, Timo Vesala, Petri Keronen, Pasi Kolari, Samuli Launiainen, Jukka Pumpanen, Üllar Rannik, Erkki Siivola, Janne Levula, and Toivo Pohja https://doi.org/10.18140/FLX/1669637

FLUXNET-CH4 FI-Lom Lompolojankka Aurela, Mika, Annalea Lohila, Juha-Pekka Tuovinen, Juha Hatakka, Juuso Rainne, Timo Mäkelä, and Tuomas Lauria https://doi.org/10.18140/FLX/1669638

FLUXNET-CH4 FI-Si2 Siikaneva-2 Bog Vesala, Timo, Eeva-Stiina Tuittila, Ivan Mammarella, and Pavel Alekseychik https://doi.org/10.18140/FLX/1669639

FLUXNET-CH4 FR-LGt La Guette Jacotot, Adrien, Sébastien Gogo, and Fatima Laggoun-Défarge https://doi.org/10.18140/FLX/1669640

FLUXNET-CH4 HK-MPM Mai Po Mangrove Lai, Derrick Y. F. and Jiangong Liu https://doi.org/10.18140/FLX/1669642

FLUXNET-CH4 ID-Pag Palangkaraya undrained forest Sakabe, Ayaka, Masayuki Itoh, Takashi Hirano, and Kitso Kusin https://doi.org/10.18140/FLX/1669643

FLUXNET-CH4 IT-BCi Borgo Cioffi Magliulo, Vincenzo, Paul Di Tommasi, Daniela Famulari, Daniele Gasbarra, Luca Vitale, Antonio Manco, Ferdinando di Matteo, Andrea Esposito, and Maurizio Tosca https://doi.org/10.18140/FLX/1669644

FLUXNET-CH4 IT-Cas Castellaro Manca, Giovanni and Ignacio Goded https://doi.org/10.18140/FLX/1669645

FLUXNET-CH4 JP-BBY Bibai bog Ueyama, Masahito, Takashi Hirano, and Yasuhiro Kominami https://doi.org/10.18140/FLX/1669646

FLUXNET-CH4 JP-Mse Mase rice paddy field Iwata, Hiroki https://doi.org/10.18140/FLX/1669647

FLUXNET-CH4 JP-SwL Suwa Lake Iwata, Hiroki https://doi.org/10.18140/FLX/1669648

FLUXNET-CH4 KR-CRK Cheorwon Rice paddy Ryu, Youngryel, Minseok Kang, and Jongho Kim https://doi.org/10.18140/FLX/1669649

FLUXNET-CH4 MY-MLM Maludam National Park Tang, Angela Che Ing, Guan Xhuan Wong, Lulie Melling, Edward Baran Aeries, Joseph Wenceslaus Waili, Kevin Kemudang Musin, Kim San Lo, and Frankie Kiew https://doi.org/10.18140/FLX/1669650

FLUXNET-CH4 NL-Hor Horstermeer Dolman, Han, Dimmie Hendriks, Frans-Jan Parmentier, Luca Belelli Marchesini, Joshua Dean, and Ko van Huissteden https://doi.org/10.18140/FLX/1669651

FLUXNET-CH4 NZ-Kop Kopuatai Campbell, David and Jordan Goodrich https://doi.org/10.18140/FLX/1669652

FLUXNET-CH4 PH-RiF Philippines Rice Institute flooded Alberto, Maricar and Reiner Wassmann https://doi.org/10.18140/FLX/1669653

FLUXNET-CH4 RU-Ch2 Chersky reference Goeckede, Mathias https://doi.org/10.18140/FLX/1669654

FLUXNET-CH4 RU-Che Cherski Merbold, Lutz, Corinna Rebmann, and Chiara Corradi https://doi.org/10.18140/FLX/1669655

FLUXNET-CH4 RU-Cok Chokurdakh Dolman, Han, Michiel van der Molen, Frans-Jan Parmentier, Luca Belelli Marchesini, Joshua Dean, Ko van Huissteden, and Trofim Maximov https://doi.org/10.18140/FLX/1669656

FLUXNET-CH4 RU-Fy2 Fyodorovskoye dry spruce Varlagin, Andrej https://doi.org/10.18140/FLX/1669657

FLUXNET-CH4 SE-Deg Degero Nilsson, Mats B. and Matthias Peichl https://doi.org/10.18140/FLX/1669659

FLUXNET-CH4 UK-LBT London_BT Helfter, Carole https://doi.org/10.18140/FLX/1670207

FLUXNET-CH4 US-A03 ARM-AMF3-Oliktok Billesbach, Dave and Ryan Sullivan https://doi.org/10.18140/FLX/1669661

FLUXNET-CH4 US-A10 ARM-NSA-Barrow Billesbach, Dave and Ryan Sullivan https://doi.org/10.18140/FLX/1669662

FLUXNET-CH4 US-Atq Atqasuk Zona, Donatella and Walter C. Oechel https://doi.org/10.18140/FLX/1669663

FLUXNET-CH4 US-Beo Barrow Environmental Observatory (BEO) tower Zona, Donatella and Walter C. Oechel https://doi.org/10.18140/FLX/1669664

FLUXNET-CH4 US-Bes Barrow-Bes (Biocomplexity Experiment South tower) Zona, Donatella and Walter C. Oechel https://doi.org/10.18140/FLX/1669665

FLUXNET-CH4 US-Bi1 Bouldin Island Alfalfa Rey-Sanchez, Camilo, Daphne Szutu, Robert Shortt, Samuel D. Chamberlain, Joseph Verfaillie, and Dennis Baldocchi https://doi.org/10.18140/FLX/1669666

FLUXNET-CH4 US-Bi2 Bouldin Island corn Rey-Sanchez, Camilo, Daphne Szutu, Kyle Hemes, Joseph Verfaillie, and Dennis Baldocchi https://doi.org/10.18140/FLX/1669667

FLUXNET-CH4 US-BZB Bonanza Creek Thermokarst Bog Euskirchen, Eugenie and Colin Edgar https://doi.org/10.18140/FLX/1669668

FLUXNET-CH4 US-BZF Bonanza Creek Rich Fen Euskirchen, Eugenie and Colin Edgar https://doi.org/10.18140/FLX/1669669

FLUXNET-CH4 US-BZS Bonanza Creek Black Spruce Euskirchen, Eugenie and Colin Edgar https://doi.org/10.18140/FLX/1669670

FLUXNET-CH4 US-CRT Curtice Walter-Berger cropland Chen, Jiquan and Housen Chu https://doi.org/10.18140/FLX/1669671

FLUXNET-CH4 US-DPW Disney Wilderness Preserve Wetland Hinkle, Charles Ross and Rosvel Bracho https://doi.org/10.18140/FLX/1669672

FLUXNET-CH4 US-EDN Eden Landing Ecological Reserve Oikawa, Patty https://doi.org/10.18140/FLX/1669673

FLUXNET-CH4 US-EML Eight Mile Lake Permafrost thaw gradient, Healy Alaska Schuur, E. A. https://doi.org/10.18140/FLX/1669674

FLUXNET-CH4 US-Ho1 Howland Forest (main tower). Richardson, Andrew D. and David Y. Hollinger https://doi.org/10.18140/FLX/1669675

FLUXNET-CH4 US-HRA Humnoke Farm Rice Field – Field A Runkle, Benjamin, Michele Reba, and Kosana Suvocarev https://doi.org/10.18140/FLX/1669676

FLUXNET-CH4 US-HRC Humnoke Farm Rice Field – Field C Reba, Michele, Benjamin Runkle, and Kosana Suvocarev https://doi.org/10.18140/FLX/1669677

FLUXNET-CH4 US-ICs Imnavait Creek Watershed Wet Sedge Tundra Euskirchen, Eugenie, Marion Bret-Harte, and Colin Edgar https://doi.org/10.18140/FLX/1669678

FLUXNET-CH4 US-Ivo Ivotuk Zona, Donatella and Walter C. Oechel https://doi.org/10.18140/FLX/1669679

FLUXNET-CH4 US-LA1 Pointe-aux-Chenes Brackish Marsh Holm, Guerry O., Brian C. Perez, David E. McWhorter, Ken W. Krauss, Richard C. Raynie, and Charles J. Killebrew https://doi.org/10.18140/FLX/1669680

FLUXNET-CH4 US-LA2 Salvador WMA Freshwater Marsh Holm, Guerry O., Brian C. Perez, David E. McWhorter, Ken W. Krauss, Richard C. Raynie, and Charles J. Killebrew https://doi.org/10.18140/FLX/1669681

FLUXNET-CH4 US-Los Lost Creek Desai, Ankur R. and Jonathan Thom https://doi.org/10.18140/FLX/1669682

FLUXNET-CH4 US-MAC MacArthur Agro-Ecology Sparks, Jed P. https://doi.org/10.18140/FLX/1669683

FLUXNET-CH4 US-MRM Marsh Resource Meadowlands Mitigation Bank Schafer, Karina https://doi.org/10.18140/FLX/1669684

FLUXNET-CH4 US-Myb Mayberry Wetland Matthes, Jaclyn Hatala, Cove Sturtevant, Patty Oikawa, Samuel D. Chamberlain, Daphne Szutu, Ariane Arias Ortiz, Joseph Verfaillie, and Dennis Baldocchi https://doi.org/10.18140/FLX/1669685

FLUXNET-CH4 US-NC4 NC_AlligatorRiver Noormets, Asko, John King, Bhaskar Mitra, Guofang Miao, Maricar Aguilos, Kevan Minick, Prajaya Prajapati, Jean-Christophe Domec, Jonathan Furst, and Maxwell Wightman https://doi.org/10.18140/FLX/1669686

FLUXNET-CH4 US-NGB NGEE Arctic Barrow Torn, Margaret and Sigrid Dengel https://doi.org/10.18140/FLX/1669687

FLUXNET-CH4 US-NGC NGEE Arctic Council Torn, Margaret and Sigrid Dengel https://doi.org/10.18140/FLX/1669688

FLUXNET-CH4 US-ORv Olentangy River Wetland Research Park Bohrer, Gil and Timothy H. Morin https://doi.org/10.18140/FLX/1669689

FLUXNET-CH4 US-OWC Old Woman Creek Bohrer, Gil, Janice Kerns, Timothy H. Morin, A. Camilo Rey-Sanchez, Jorge Villa, and Yang Ju https://doi.org/10.18140/FLX/1669690

FLUXNET-CH4 US-PFa Park Falls/WLEF Desai, Ankur R. and Jonathan Thom https://doi.org/10.18140/FLX/1669691

FLUXNET-CH4 US-Snd Sherman Island Detto, Matteo, Cove Sturtevant, Patty Oikawa, Joseph Verfaillie, and Dennis Baldocchi https://doi.org/10.18140/FLX/1669692

FLUXNET-CH4 US-Sne Sherman Island Restored Wetland Shortt, Robert, Kyle Hemes, Daphne Szutu, Joseph Verfaillie, and Dennis Baldocchi https://doi.org/10.18140/FLX/1669693

FLUXNET-CH4 US-Srr Suisun marsh - Rush Ranch Windham-Myers, Lisamarie, Ellen Stuart-Haëntjens, Brian Bergamaschi, Sara Knox, Frank Anderson, and Kyle Nakatsuka https://doi.org/10.18140/FLX/1669694

FLUXNET-CH4 US-StJ St Jones Reserve Vazquez-Lule, Alma and Rodrigo Vargas https://doi.org/10.18140/FLX/1669695

FLUXNET-CH4 US-Tw1 Twitchell Wetland West Pond Valach, Alex, Daphne Szutu, Elke Eichelmann, Sara Knox, Joseph Verfaillie, and Dennis Baldocchi https://doi.org/10.18140/FLX/1669696

FLUXNET-CH4 US-Tw3 Twitchell Alfalfa. Chamberlain, Samuel D., Patty Oikawa, Cove Sturtevant, Daphne Szutu, Joseph Verfaillie, and Dennis Baldocchi https://doi.org/10.18140/FLX/1669697

FLUXNET-CH4 US-Tw4 Twitchell East End Wetland Eichelmann, Elke, Sara Knox, Camilo Rey Sanchez, Alex Valach, Cove Sturtevant, Daphne Szutu, Joseph Verfaillie, and Dennis Baldocchi https://doi.org/10.18140/FLX/1669698

FLUXNET-CH4 US-Tw5 East Pond Wetland Valach, Alex, Kuno Kasak, Daphne Szutu, Joseph Verfaillie, and Dennis Baldocchi https://doi.org/10.18140/FLX/1669699

FLUXNET-CH4 US-Twt Twitchell Island Knox, Sara, Jaclyn Hatala Matthes, Joseph Verfaillie, and Dennis Baldocchi https://doi.org/10.18140/FLX/1669700

FLUXNET-CH4 US-Uaf University of Alaska, Fairbanks Iwata, Hiroki, Masahito Ueyama, and Yoshinobu Harazono https://doi.org/10.18140/FLX/1669701

FLUXNET-CH4 US-WPT Winous Point North Marsh Chen, Jiquan and Housen Chu https://doi.org/10.18140/FLX/1669702

FLUXNET-CH4 CH-Oe2 Oensingen crop Hörtnagl, Lukas, Regine Maier, Werner Eugster, Nina Buchmann, Carmen Emmel, Patrick Koller, Thomas Baur, Peter Pluess, Florian Käslin, and Philip Meier https://doi.org/10.18140/FLX/1669631

FLUXNET-CH4 FI-Sii Siikaneva Vesala, Timo, Eeva-Stiina Tuittila, Ivan Mammarella, and Janne Rinne https://doi.org/10.18140/FLX/1669640

Kyle B. Delwiche et al.

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Latest update: 07 Mar 2021
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Short summary
Methane is an important greenhouse gas, yet we lack knowledge about its global emissions and drivers. We present FLUXNET-CH4, a new global collection of methane measurements and a critical resource for the research community. We use FLUXNET-CH4 data to quantify the seasonality of methane emissions from freshwater wetlands, finding that methane seasonality varies strongly with latitude. Our new database and analysis will improve wetland model accuracy and inform greenhouse gas budgets.