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  • Boy, MichaelLappeenranta University Of Technology (LUT),University of Helsinki (author)

Positive feedback mechanism between biogenic volatile organic compounds and the methane lifetime in future climates

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-09-15
  • Springer Science and Business Media LLC,2022

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:0e871197-60aa-4bb3-9a16-dfaa05e1a054
  • https://lup.lub.lu.se/record/0e871197-60aa-4bb3-9a16-dfaa05e1a054URI
  • https://doi.org/10.1038/s41612-022-00292-0DOI

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  • Language:English
  • Summary in:English

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

Notes

  • A multitude of biogeochemical feedback mechanisms govern the climate sensitivity of Earth in response to radiation balance perturbations. One feedback mechanism, which remained missing from most current Earth System Models applied to predict future climate change in IPCC AR6, is the impact of higher temperatures on the emissions of biogenic volatile organic compounds (BVOCs), and their subsequent effects on the hydroxyl radical (OH) concentrations. OH, in turn, is the main sink term for many gaseous compounds including methane, which is the second most important human-influenced greenhouse gas in terms of climate forcing. In this study, we investigate the impact of this feedback mechanism by applying two models, a one-dimensional chemistry-transport model, and a global chemistry-transport model. The results indicate that in a 6 K temperature increase scenario, the BVOC-OH-CH4 feedback increases the lifetime of methane by 11.4% locally over the boreal region when the temperature rise only affects chemical reaction rates, and not both, chemistry and BVOC emissions. This would lead to a local increase in radiative forcing through methane (ΔRFCH4) of approximately 0.013 Wm−2 per year, which is 2.1% of the current ΔRFCH4. In the whole Northern hemisphere, we predict an increase in the concentration of methane by 0.024% per year comparing simulations with temperature increase only in the chemistry or temperature increase in chemistry and BVOC emissions. This equals approximately 7% of the annual growth rate of methane during the years 2008–2017 (6.6 ± 0.3 ppb yr−1) and leads to an ΔRFCH4 of 1.9 mWm−2 per year.

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

  • Zhou, PutianUniversity of Helsinki(Swepub:lu)pu6463zh (author)
  • Kurtén, TheoUniversity of Helsinki (author)
  • Chen, DeanUniversity of Helsinki (author)
  • Xavier, CarltonUniversity of Helsinki(Swepub:lu)ca1121xa (author)
  • Clusius, PetriUniversity of Helsinki (author)
  • Roldin, PontusLund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Aerosoler,LTH profilområden,Centre for Environmental and Climate Science (CEC),Faculty of Science,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH(Swepub:lu)nucl-pur (author)
  • Baykara, MetinUniversity of Helsinki,Istanbul Technical University (author)
  • Pichelstorfer, LukasUniversity of Salzburg,University of Helsinki(Swepub:lu)lu1031pi (author)
  • Foreback, BenjaminUniversity of Helsinki,Beijing University of Chemical Technology (author)
  • Bäck, JaanaUniversity of Helsinki (author)
  • Petäjä, TuukkaUniversity of Helsinki (author)
  • Makkonen, RistoUniversity of Helsinki,Finnish Meteorological Institute (author)
  • Kerminen, Veli MattiUniversity of Helsinki (author)
  • Pihlatie, MariUniversity of Helsinki,Beijing University of Chemical Technology (author)
  • Aalto, JuhoUniversity of Helsinki (author)
  • Kulmala, MarkkuUniversity of Helsinki,Beijing University of Chemical Technology,Nanjing University (author)
  • Lappeenranta University Of Technology (LUT)University of Helsinki (creator_code:org_t)

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  • In:npj Climate and Atmospheric Science: Springer Science and Business Media LLC5:12397-3722

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