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Publications (10 of 57) Show all publications
Kahnert, M. & Scheirer, R. (2019). Multiple scattering by aerosols as seen from CALIPSO - a Monte-Carlo modelling study. Optics Express, 27(23), 33684-33700
Open this publication in new window or tab >>Multiple scattering by aerosols as seen from CALIPSO - a Monte-Carlo modelling study
2019 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 27, no 23, p. 33684-33700Article in journal (Refereed) Published
National Category
Meteorology and Atmospheric Sciences
Research subject
Meteorology
Identifiers
urn:nbn:se:smhi:diva-5483 (URN)10.1364/OE.27.033683 (DOI)000495871300069 ()
Available from: 2019-12-03 Created: 2019-12-03 Last updated: 2019-12-03Bibliographically approved
Sun, B., Bi, L., Ping, Y., Kahnert, M. & Kattawar, G. (2019). nvariant Imbedding T-matrix Method for Light Scattering by Nonspherical and Inhomogeneous Particles (1sted.). Elsevier
Open this publication in new window or tab >>nvariant Imbedding T-matrix Method for Light Scattering by Nonspherical and Inhomogeneous Particles
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2019 (English)Book (Refereed)
Place, publisher, year, edition, pages
Elsevier, 2019. p. 272 Edition: 1st
National Category
Earth and Related Environmental Sciences
Research subject
Environment
Identifiers
urn:nbn:se:smhi:diva-5463 (URN)9780128180907 (ISBN)
Available from: 2019-11-12 Created: 2019-11-12 Last updated: 2019-11-12Bibliographically approved
Sun, B., Bi, L., Yang, P., Kahnert, M. & Kattawar, G. (2019). View on ScienceDirectInvariant Imbedding T-matrix Method for Light Scattering by Nonspherical and Inhomogeneous Particles (1ed.). Elsevier
Open this publication in new window or tab >>View on ScienceDirectInvariant Imbedding T-matrix Method for Light Scattering by Nonspherical and Inhomogeneous Particles
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2019 (English)Book (Refereed)
Place, publisher, year, edition, pages
Elsevier, 2019. p. 272 Edition: 1
National Category
Earth and Related Environmental Sciences
Research subject
Environment
Identifiers
urn:nbn:se:smhi:diva-5474 (URN)9780128180907 (ISBN)9780128180914 (ISBN)
Available from: 2019-11-19 Created: 2019-11-19 Last updated: 2019-11-19Bibliographically approved
Kanngiesser, F. & Kahnert, M. (2018). Calculation of optical properties of light-absorbing carbon with weakly absorbing coating: A model with tunable transition from film-coating to spherical-shell coating. Journal of Quantitative Spectroscopy and Radiative Transfer, 216, 17-36
Open this publication in new window or tab >>Calculation of optical properties of light-absorbing carbon with weakly absorbing coating: A model with tunable transition from film-coating to spherical-shell coating
2018 (English)In: Journal of Quantitative Spectroscopy and Radiative Transfer, ISSN 0022-4073, E-ISSN 1879-1352, Vol. 216, p. 17-36Article in journal (Refereed) Published
National Category
Environmental Sciences
Research subject
Environment
Identifiers
urn:nbn:se:smhi:diva-4795 (URN)10.1016/j.jqsrt.2018.05.014 (DOI)000437059600003 ()
Available from: 2018-08-07 Created: 2018-08-07 Last updated: 2018-08-07Bibliographically approved
Kahnert, M. (2018). Information constraints in variational data assimilation. Quarterly Journal of the Royal Meteorological Society, 144(716), 2230-2244
Open this publication in new window or tab >>Information constraints in variational data assimilation
2018 (English)In: Quarterly Journal of the Royal Meteorological Society, ISSN 0035-9009, E-ISSN 1477-870X, Vol. 144, no 716, p. 2230-2244Article in journal (Refereed) Published
National Category
Environmental Sciences
Research subject
Environment
Identifiers
urn:nbn:se:smhi:diva-5013 (URN)10.1002/qj.3347 (DOI)000450035900015 ()
Available from: 2018-11-28 Created: 2018-11-28 Last updated: 2018-11-28Bibliographically approved
Haapanala, P., Raisanen, P., McFarquhar, G. M., Tiira, J., Macke, A., Kahnert, M., . . . Nousiainen, T. (2017). Disk and circumsolar radiances in the presence of ice clouds. Atmospheric Chemistry And Physics, 17(11), 6865-6882
Open this publication in new window or tab >>Disk and circumsolar radiances in the presence of ice clouds
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2017 (English)In: Atmospheric Chemistry And Physics, ISSN 1680-7316, E-ISSN 1680-7324, Vol. 17, no 11, p. 6865-6882Article in journal (Refereed) Published
National Category
Environmental Sciences
Research subject
Environment
Identifiers
urn:nbn:se:smhi:diva-4139 (URN)10.5194/acp-17-6865-2017 (DOI)000403214200005 ()
Available from: 2017-08-08 Created: 2017-08-08 Last updated: 2017-08-08Bibliographically approved
Kahnert, M. & Andersson, E. (2017). How much information do extinction and backscattering measurements contain about the chemical composition of atmospheric aerosol?. Atmospheric Chemistry And Physics, 17(5), 3423-3444
Open this publication in new window or tab >>How much information do extinction and backscattering measurements contain about the chemical composition of atmospheric aerosol?
2017 (English)In: Atmospheric Chemistry And Physics, ISSN 1680-7316, E-ISSN 1680-7324, Vol. 17, no 5, p. 3423-3444Article in journal (Refereed) Published
National Category
Environmental Sciences
Research subject
Environment
Identifiers
urn:nbn:se:smhi:diva-4043 (URN)10.5194/acp-17-3423-2017 (DOI)000397795000003 ()
Available from: 2017-04-12 Created: 2017-04-12 Last updated: 2017-11-29Bibliographically approved
Kahnert, M. (2017). Optical properties of black carbon aerosols encapsulated in a shell of sulfate: comparison of the closed cell model with a coated aggregate model. Optics Express, 25(20), 24579-24593
Open this publication in new window or tab >>Optical properties of black carbon aerosols encapsulated in a shell of sulfate: comparison of the closed cell model with a coated aggregate model
2017 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 25, no 20, p. 24579-24593Article in journal (Refereed) Published
National Category
Earth and Related Environmental Sciences
Research subject
Environment
Identifiers
urn:nbn:se:smhi:diva-4308 (URN)10.1364/OE.25.024579 (DOI)000412048500107 ()29041403 (PubMedID)
Available from: 2017-11-13 Created: 2017-11-13 Last updated: 2017-11-29Bibliographically approved
Andersson, E. & Kahnert, M. (2016). Coupling aerosol optics to the MATCH (v5.5.0) chemical transport model and the SALSA (v1) aerosol microphysics module. Geoscientific Model Development, 9(5), 1803-1826
Open this publication in new window or tab >>Coupling aerosol optics to the MATCH (v5.5.0) chemical transport model and the SALSA (v1) aerosol microphysics module
2016 (English)In: Geoscientific Model Development, ISSN 1991-959X, E-ISSN 1991-9603, Vol. 9, no 5, p. 1803-1826Article in journal (Refereed) Published
Abstract [en]

A new aerosol-optics model is implemented in which realistic morphologies and mixing states are assumed, especially for black carbon particles. The model includes both external and internal mixing of all chemical species, it treats externally mixed black carbon as fractal aggregates, and it accounts for inhomogeneous internal mixing of black carbon by use of a novel "core-grey-shell" model. Simulated results of aerosol optical properties, such as aerosol optical depth, backscattering coefficients and the Angstrom exponent, as well as radiative fluxes are computed with the new optics model and compared with results from an older optics-model version that treats all particles as externally mixed homogeneous spheres. The results show that using a more detailed description of particle morphology and mixing state impacts the aerosol optical properties to a degree of the same order of magnitude as the effects of aerosol-microphysical processes. For instance, the aerosol optical depth computed for two cases in 2007 shows a relative difference between the two optics models that varies over the European region between 28 and 18 %, while the differences caused by the inclusion or omission of the aerosol-microphysical processes range from 50 to 37 %. This is an important finding, suggesting that a simple optics model coupled to a chemical transport model can introduce considerable errors affecting radiative fluxes in chemistry-climate models, compromising comparisons of model results with remote sensing observations of aerosols, and impeding the assimilation of satellite products for aerosols into chemical-transport models.

National Category
Environmental Sciences
Research subject
Environment
Identifiers
urn:nbn:se:smhi:diva-2199 (URN)10.5194/gmd-9-1803-2016 (DOI)000376937800007 ()
Available from: 2016-07-08 Created: 2016-07-08 Last updated: 2017-11-28Bibliographically approved
Kahnert, M., Nousiainen, T. & Markkanen, J. (2016). Morphological models for inhomogeneous particles: Light scattering by aerosols, cometary dust, and living cells (2ed.). In: Kokhanovsky, Alexander (Ed.), Light Scattering Reviews, Volume 11: Light Scattering and Radiative Transfer (pp. 299-337). Berlin: Springer
Open this publication in new window or tab >>Morphological models for inhomogeneous particles: Light scattering by aerosols, cometary dust, and living cells
2016 (English)In: Light Scattering Reviews, Volume 11: Light Scattering and Radiative Transfer / [ed] Kokhanovsky, Alexander, Berlin: Springer , 2016, 2, p. 299-337Chapter in book (Refereed)
Place, publisher, year, edition, pages
Berlin: Springer, 2016 Edition: 2
National Category
Environmental Sciences
Research subject
Environment
Identifiers
urn:nbn:se:smhi:diva-3330 (URN)
Available from: 2016-10-14 Created: 2016-10-14 Last updated: 2016-10-14Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-5695-1356

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