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    FLUXNET-CH4 Synthesis Activity: Objectives, Observations, and Future Directions

    Source: Bulletin of the American Meteorological Society:;2020:;volume( 100 ):;issue: 012::page 2607
    Author:
    Knox, Sara H.;Jackson, Robert B.;Poulter, Benjamin;McNicol, Gavin;Fluet-Chouinard, Etienne;Zhang, Zhen;Hugelius, Gustaf;Bousquet, Philippe;Canadell, Josep G.;Saunois, Marielle;Papale, Dario;Chu, Housen;Keenan, Trevor F.;Baldocchi, Dennis;Torn, Margaret S.;Mammarella, Ivan;Trotta, Carlo;Aurela, Mika;Bohrer, Gil;Campbell, David I.;Cescatti, Alessandro;Chamberlain, Samuel;Chen, Jiquan;Chen, Weinan;Dengel, Sigrid;Desai, Ankur R.;Euskirchen, Eugenie;Friborg, Thomas;Gasbarra, Daniele;Goded, Ignacio;Goeckede, Mathias;Heimann, Martin;Helbig, Manuel;Hirano, Takashi;Hollinger, David Y.;Iwata, Hiroki;Kang, Minseok;Klatt, Janina;Krauss, Ken W.;Kutzbach, Lars;Lohila, Annalea;Mitra, Bhaskar;Morin, Timothy H.;Nilsson, Mats B.;Niu, Shuli;Noormets, Asko;Oechel, Walter C.;Peichl, Matthias;Peltola, Olli;Reba, Michele L.;Richardson, Andrew D.;Runkle, Benjamin R. K.;Ryu, Youngryel;Sachs, Torsten;Schäfer, Karina V. R.;Schmid, Hans Peter;Shurpali, Narasinha;Sonnentag, Oliver;Tang, Angela C. I.;Ueyama, Masahito;Vargas, Rodrigo;Vesala, Timo;Ward, Eric J.;Windham-Myers, Lisamarie;Wohlfahrt, Georg;Zona, Donatella
    DOI: 10.1175/BAMS-D-18-0268.1
    Publisher: American Meteorological Society
    Abstract: This paper describes the formation of, and initial results for, a new FLUXNET coordination network for ecosystem-scale methane (CH4) measurements at 60 sites globally, organized by the Global Carbon Project in partnership with other initiatives and regional flux tower networks. The objectives of the effort are presented along with an overview of the coverage of eddy covariance (EC) CH4 flux measurements globally, initial results comparing CH4 fluxes across the sites, and future research directions and needs. Annual estimates of net CH4 fluxes across sites ranged from −0.2 ± 0.02 g C m–2 yr–1 for an upland forest site to 114.9 ± 13.4 g C m–2 yr–1 for an estuarine freshwater marsh, with fluxes exceeding 40 g C m–2 yr–1 at multiple sites. Average annual soil and air temperatures were found to be the strongest predictor of annual CH4 flux across wetland sites globally. Water table position was positively correlated with annual CH4 emissions, although only for wetland sites that were not consistently inundated throughout the year. The ratio of annual CH4 fluxes to ecosystem respiration increased significantly with mean site temperature. Uncertainties in annual CH4 estimates due to gap-filling and random errors were on average ±1.6 g C m–2 yr–1 at 95% confidence, with the relative error decreasing exponentially with increasing flux magnitude across sites. Through the analysis and synthesis of a growing EC CH4 flux database, the controls on ecosystem CH4 fluxes can be better understood, used to inform and validate Earth system models, and reconcile differences between land surface model- and atmospheric-based estimates of CH4 emissions.
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      FLUXNET-CH4 Synthesis Activity: Objectives, Observations, and Future Directions

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4264390
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    contributor authorKnox, Sara H.;Jackson, Robert B.;Poulter, Benjamin;McNicol, Gavin;Fluet-Chouinard, Etienne;Zhang, Zhen;Hugelius, Gustaf;Bousquet, Philippe;Canadell, Josep G.;Saunois, Marielle;Papale, Dario;Chu, Housen;Keenan, Trevor F.;Baldocchi, Dennis;Torn, Margaret S.;Mammarella, Ivan;Trotta, Carlo;Aurela, Mika;Bohrer, Gil;Campbell, David I.;Cescatti, Alessandro;Chamberlain, Samuel;Chen, Jiquan;Chen, Weinan;Dengel, Sigrid;Desai, Ankur R.;Euskirchen, Eugenie;Friborg, Thomas;Gasbarra, Daniele;Goded, Ignacio;Goeckede, Mathias;Heimann, Martin;Helbig, Manuel;Hirano, Takashi;Hollinger, David Y.;Iwata, Hiroki;Kang, Minseok;Klatt, Janina;Krauss, Ken W.;Kutzbach, Lars;Lohila, Annalea;Mitra, Bhaskar;Morin, Timothy H.;Nilsson, Mats B.;Niu, Shuli;Noormets, Asko;Oechel, Walter C.;Peichl, Matthias;Peltola, Olli;Reba, Michele L.;Richardson, Andrew D.;Runkle, Benjamin R. K.;Ryu, Youngryel;Sachs, Torsten;Schäfer, Karina V. R.;Schmid, Hans Peter;Shurpali, Narasinha;Sonnentag, Oliver;Tang, Angela C. I.;Ueyama, Masahito;Vargas, Rodrigo;Vesala, Timo;Ward, Eric J.;Windham-Myers, Lisamarie;Wohlfahrt, Georg;Zona, Donatella
    date accessioned2022-01-30T18:02:23Z
    date available2022-01-30T18:02:23Z
    date copyright1/7/2020 12:00:00 AM
    date issued2020
    identifier issn0003-0007
    identifier otherbams-d-18-0268_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4264390
    description abstractThis paper describes the formation of, and initial results for, a new FLUXNET coordination network for ecosystem-scale methane (CH4) measurements at 60 sites globally, organized by the Global Carbon Project in partnership with other initiatives and regional flux tower networks. The objectives of the effort are presented along with an overview of the coverage of eddy covariance (EC) CH4 flux measurements globally, initial results comparing CH4 fluxes across the sites, and future research directions and needs. Annual estimates of net CH4 fluxes across sites ranged from −0.2 ± 0.02 g C m–2 yr–1 for an upland forest site to 114.9 ± 13.4 g C m–2 yr–1 for an estuarine freshwater marsh, with fluxes exceeding 40 g C m–2 yr–1 at multiple sites. Average annual soil and air temperatures were found to be the strongest predictor of annual CH4 flux across wetland sites globally. Water table position was positively correlated with annual CH4 emissions, although only for wetland sites that were not consistently inundated throughout the year. The ratio of annual CH4 fluxes to ecosystem respiration increased significantly with mean site temperature. Uncertainties in annual CH4 estimates due to gap-filling and random errors were on average ±1.6 g C m–2 yr–1 at 95% confidence, with the relative error decreasing exponentially with increasing flux magnitude across sites. Through the analysis and synthesis of a growing EC CH4 flux database, the controls on ecosystem CH4 fluxes can be better understood, used to inform and validate Earth system models, and reconcile differences between land surface model- and atmospheric-based estimates of CH4 emissions.
    publisherAmerican Meteorological Society
    titleFLUXNET-CH4 Synthesis Activity: Objectives, Observations, and Future Directions
    typeJournal Paper
    journal volume100
    journal issue12
    journal titleBulletin of the American Meteorological Society
    identifier doi10.1175/BAMS-D-18-0268.1
    journal fristpage2607
    journal lastpage2632
    treeBulletin of the American Meteorological Society:;2020:;volume( 100 ):;issue: 012
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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