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The analysis of spectral signatures of a polar stratospheric cloud in airborne infrared remote sensing observations in the Arctic in combination with further collocated measurements supports the view that the observed cloud consisted of highly aspherical nitric acid trihydrate particles. A characteristic "shoulder-like" spectral signature may be exploited for identification of large, highly aspherical nitric acid trihydrate particles involved in denitrification of the polar winter stratosphere.
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Articles | Volume 16, issue 14
Atmos. Chem. Phys., 16, 9505–9532, 2016
https://doi.org/10.5194/acp-16-9505-2016
Atmos. Chem. Phys., 16, 9505–9532, 2016
https://doi.org/10.5194/acp-16-9505-2016

Research article 29 Jul 2016

Research article | 29 Jul 2016

Spectroscopic evidence of large aspherical β-NAT particles involved in denitrification in the December 2011 Arctic stratosphere

Wolfgang Woiwode et al.

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Cited articles

Bi, L., Yang, P., Kattawar, G. W., and Mishchenko, M. I.: Efficient implementation of the invariant imbedding T-matrix method and the separation of variables method applied to large nonspherical inhomogeneous particles, J. Quant. Spectrosc. Ra., 116, 169–183, 2013.
Biermann, U. M.: Gefrier- und FTIR-Experimente zur Nukleation und Lebensdauer stratosphärischer Wolken, PhD thesis, Universität Bielefeld, cuvillier Verlag, ISBN 3-89712-212-X, 1998.
Biermann, U. M., Crowley, J. N., Huthwelker, T., Moortgat, G. K., Crutzen, P. J., and Peter, T.: FTIR studies on lifetime prolongation of stratospheric ice particles due to NAT coating, Geophys. Res. Lett., 25, 3939–3942, https://doi.org/10.1029/1998GL900040, 1998.
Biermann, U. M., Luo, B. P., and Peter, T.: Absorption spectra and optical constants of binary and ternary solutions of H2SO4,HNO3, and H2O in the mid infrared at atmospheric temperatures, J. Phys. Chem. A, 104, 783–793, 2000.
Borrmann, S., Luo, B., and Mishchenko, M.: The application of the T-matrix method to the measurement of aspherical particles with forward scattering optical particle counters, J. Aerosol Sci., 31, 789–799, 2000.
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Short summary
The analysis of spectral signatures of a polar stratospheric cloud in airborne infrared remote sensing observations in the Arctic in combination with further collocated measurements supports the view that the observed cloud consisted of highly aspherical nitric acid trihydrate particles. A characteristic "shoulder-like" spectral signature may be exploited for identification of large, highly aspherical nitric acid trihydrate particles involved in denitrification of the polar winter stratosphere.
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