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  • Tsuruta, AkiFinnish Meteorological Institute (author)

Methane budget estimates in Finland from the CarbonTracker Europe-CH4 data assimilation system

  • Article/chapterEnglish2019

Publisher, publication year, extent ...

  • 2019-01-01
  • Stockholm University Press,2019

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:75721a84-4596-4805-b1dd-1637c5df9668
  • https://lup.lub.lu.se/record/75721a84-4596-4805-b1dd-1637c5df9668URI
  • https://doi.org/10.1080/16000889.2018.1565030DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • We estimated the CH4 budget in Finland for 2004–2014 using the CTE-CH4 data assimilation system with an extended atmospheric CH4 observation network of seven sites from Finland to surrounding regions (Hyytiälä, Kjølnes, Kumpula, Pallas, Puijo, Sodankylä, and Utö). The estimated average annual total emission for Finland is 0.6 ± 0.5 Tg CH4 yr−1. Sensitivity experiments show that the posterior biospheric emission estimates for Finland are between 0.3 and 0.9 Tg CH4 yr−1, which lies between the LPX-Bern-DYPTOP (0.2 Tg CH4 yr−1) and LPJG-WHyMe (2.2 Tg CH4 yr−1) process-based model estimates. For anthropogenic emissions, we found that the EDGAR v4.2 FT2010 inventory (0.4 Tg CH4 yr−1) is likely to overestimate emissions in southernmost Finland, but the extent of overestimation and possible relocation of emissions are difficult to derive from the current observation network. The posterior emission estimates were especially reliant on prior information in central Finland. However, based on analysis of posterior atmospheric CH4, we found that the anthropogenic emission distribution based on a national inventory is more reliable than the one based on EDGAR v4.2 FT2010. The contribution of total emissions in Finland to global total emissions is only about 0.13%, and the derived total emissions in Finland showed no trend during 2004–2014. The model using optimized emissions was able to reproduce observed atmospheric CH4 at the sites in Finland and surrounding regions fairly well (correlation > 0.75, bias < ± ppb), supporting adequacy of the observations to be used in atmospheric inversion studies. In addition to global budget estimates, we found that CTE-CH4 is also applicable for regional budget estimates, where small scale (1x1 in this case) optimization is possible with a dense observation network.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Aalto, TuulaFinnish Meteorological Institute (author)
  • Backman, LeifFinnish Meteorological Institute (author)
  • Krol, Maarten C.National Instiute for Space Research,Wageningen University,Utrecht University (author)
  • Peters, WouterWageningen University,University of Groningen (author)
  • Lienert, SebastianUniversity of Bern (author)
  • Joos, FortunatUniversity of Bern (author)
  • Miller, Paul A.Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,MERGE: ModElling the Regional and Global Earth system,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science(Swepub:lu)nate-pum (author)
  • Zhang, WenxinUniversity of Copenhagen(Swepub:lu)we4544zh (author)
  • Laurila, TuomasFinnish Meteorological Institute (author)
  • Hatakka, JuhaFinnish Meteorological Institute (author)
  • Leskinen, AriFinnish Meteorological Institute,University of Eastern Finland (author)
  • Lehtinen, Kari E.J.Finnish Meteorological Institute,University of Eastern Finland (author)
  • Peltola, OlliFinnish Meteorological Institute (author)
  • Vesala, TimoUniversity of Helsinki (author)
  • Levula, JanneUniversity of Helsinki (author)
  • Dlugokencky, EdNational Oceanic and Atmospheric Administration (NOAA) (author)
  • Heimann, MartinMax Planck Institute for Biogeochemistry,University of Helsinki (author)
  • Kozlova, ElenaUniversity of Exeter (author)
  • Aurela, MikaFinnish Meteorological Institute (author)
  • Lohila, AnnaleaFinnish Meteorological Institute (author)
  • Kauhaniemi, MariFinnish Meteorological Institute (author)
  • Gomez-Pelaez, Angel J.Agencia Estatal de Meteorologia (author)
  • Finnish Meteorological InstituteNational Instiute for Space Research (creator_code:org_t)

Related titles

  • In:Tellus. Series B: Chemical and Physical Meteorology: Stockholm University Press71:11600-08890280-6509

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