Atmospheric composition change: Climate-Chemistry interactions

I. S.A. Isaksen, C. Granier, G. Myhre, T. K. Berntsen, S. B. Dalsøren, M. Gauss, Z. Klimont, R. Benestad, P. Bousquet, W. Collins, T. Cox, V. Eyring, D. Fowler, S. Fuzzi, P. Jöckel, P. Laj, U. Lohmann, M. Maione, P. Monks, A. S.H. PrevotF. Raes, A. Richter, B. Rognerud, M. Schulz, D. Shindell, D. S. Stevenson, T. Storelvmo, W. C. Wang, M. van Weele, M. Wild, D. Wuebbles

Research output: Contribution to journalReview article

Abstract

Chemically active climate compounds are either primary compounds like methane (CH4), removed by oxidation in the atmosphere, or secondary compounds like ozone (O3), sulfate and organic aerosols, both formed and removed in the atmosphere. Man-induced climate-chemistry interaction is a two-way process: Emissions of pollutants change the atmospheric composition contributing to climate change through the aforementioned climate components, and climate change, through changes in temperature, dynamics, the hydrological cycle, atmospheric stability, and biosphere-atmosphere interactions, affects the atmospheric composition and oxidation processes in the troposphere. Here we present progress in our understanding of processes of importance for climate-chemistry interactions, and their contributions to changes in atmospheric composition and climate forcing. A key factor is the oxidation potential involving compounds like O3 and the hydroxyl radical (OH). Reported studies represent both current and future changes. Reported results include new estimates of radiative forcing based on extensive model studies of chemically active climate compounds like O3, and of particles inducing both direct and indirect effects. Through EU projects like ACCENT, QUANTIFY, and the AeroCom project, extensive studies on regional and sector-wise differences in the impact on atmospheric distribution are performed. Studies have shown that land-based emissions have a different effect on climate than ship and aircraft emissions, and different measures are needed to reduce the climate impact. Several areas where climate change can affect the tropospheric oxidation process and the chemical composition are identified. This can take place through enhanced stratospheric-tropospheric exchange of ozone, more frequent periods with stable conditions favoring pollution build up over industrial areas, enhanced temperature induced biogenic emissions, methane releases from permafrost thawing, and enhanced concentration through reduced biospheric uptake. During the last 5-10 years, new observational data have been made available and used for model validation and the study of atmospheric processes. Although there are significant uncertainties in the modeling of composition changes, access to new observational data has improved modeling capability. Emission scenarios for the coming decades have a large uncertainty range, in particular with respect to regional trends, leading to a significant uncertainty range in estimated regional composition changes and climate impact.

Original languageEnglish (US)
Pages (from-to)5138-5192
Number of pages55
JournalAtmospheric Environment
Volume43
Issue number33
DOIs
StatePublished - Oct 1 2009

Fingerprint

climate change
climate
oxidation
climate effect
atmosphere-biosphere interaction
methane
ozone
aircraft emission
biogenic emission
climate forcing
atmosphere
model validation
hydrological cycle
radiative forcing
thawing
hydroxyl radical
permafrost
modeling
atmospheric composition
troposphere

Keywords

  • Atmosphere climate chemistry
  • Feedbacks modelling

ASJC Scopus subject areas

  • Environmental Science(all)
  • Atmospheric Science

Cite this

Isaksen, I. S. A., Granier, C., Myhre, G., Berntsen, T. K., Dalsøren, S. B., Gauss, M., ... Wuebbles, D. (2009). Atmospheric composition change: Climate-Chemistry interactions. Atmospheric Environment, 43(33), 5138-5192. https://doi.org/10.1016/j.atmosenv.2009.08.003

Atmospheric composition change : Climate-Chemistry interactions. / Isaksen, I. S.A.; Granier, C.; Myhre, G.; Berntsen, T. K.; Dalsøren, S. B.; Gauss, M.; Klimont, Z.; Benestad, R.; Bousquet, P.; Collins, W.; Cox, T.; Eyring, V.; Fowler, D.; Fuzzi, S.; Jöckel, P.; Laj, P.; Lohmann, U.; Maione, M.; Monks, P.; Prevot, A. S.H.; Raes, F.; Richter, A.; Rognerud, B.; Schulz, M.; Shindell, D.; Stevenson, D. S.; Storelvmo, T.; Wang, W. C.; van Weele, M.; Wild, M.; Wuebbles, D.

In: Atmospheric Environment, Vol. 43, No. 33, 01.10.2009, p. 5138-5192.

Research output: Contribution to journalReview article

Isaksen, ISA, Granier, C, Myhre, G, Berntsen, TK, Dalsøren, SB, Gauss, M, Klimont, Z, Benestad, R, Bousquet, P, Collins, W, Cox, T, Eyring, V, Fowler, D, Fuzzi, S, Jöckel, P, Laj, P, Lohmann, U, Maione, M, Monks, P, Prevot, ASH, Raes, F, Richter, A, Rognerud, B, Schulz, M, Shindell, D, Stevenson, DS, Storelvmo, T, Wang, WC, van Weele, M, Wild, M & Wuebbles, D 2009, 'Atmospheric composition change: Climate-Chemistry interactions', Atmospheric Environment, vol. 43, no. 33, pp. 5138-5192. https://doi.org/10.1016/j.atmosenv.2009.08.003
Isaksen ISA, Granier C, Myhre G, Berntsen TK, Dalsøren SB, Gauss M et al. Atmospheric composition change: Climate-Chemistry interactions. Atmospheric Environment. 2009 Oct 1;43(33):5138-5192. https://doi.org/10.1016/j.atmosenv.2009.08.003
Isaksen, I. S.A. ; Granier, C. ; Myhre, G. ; Berntsen, T. K. ; Dalsøren, S. B. ; Gauss, M. ; Klimont, Z. ; Benestad, R. ; Bousquet, P. ; Collins, W. ; Cox, T. ; Eyring, V. ; Fowler, D. ; Fuzzi, S. ; Jöckel, P. ; Laj, P. ; Lohmann, U. ; Maione, M. ; Monks, P. ; Prevot, A. S.H. ; Raes, F. ; Richter, A. ; Rognerud, B. ; Schulz, M. ; Shindell, D. ; Stevenson, D. S. ; Storelvmo, T. ; Wang, W. C. ; van Weele, M. ; Wild, M. ; Wuebbles, D. / Atmospheric composition change : Climate-Chemistry interactions. In: Atmospheric Environment. 2009 ; Vol. 43, No. 33. pp. 5138-5192.
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AU - Laj, P.

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AU - Maione, M.

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AU - Prevot, A. S.H.

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AU - Rognerud, B.

AU - Schulz, M.

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AU - Stevenson, D. S.

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KW - Feedbacks modelling

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