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DOI: 10.5445/IR/1000045957

Denitrification by large NAT particles: the impact of reduced settling velocities and hints on particle characteristics

Woiwode, W.; Grooß, J.-U.; Oelhaf, H.; Molleker, S.; Borrmann, S.; Ebersoldt, A.; Frey, W.; Gulde, T.; Khaykin, S.; Maucher, G.; Piesch, C.; Orphal, J.

Abstract:
Vertical redistribution of HNO3 through large HNO3-containing particles associated with polar stratospheric clouds (PSCs) plays an important role in the chemistry of the Arctic winter stratosphere. During the RECONCILE (Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions) campaign, apparently very large NAT (nitric acid trihydrate) particles were observed by the airborne in situ probe FSSP-100 (Molleker et al., 2014). Our analysis shows that the FSSP-100 observations associated with the flight on 25 January 2010 cannot easily be explained assuming compact spherical NAT particles due to much too short growing time at temperatures below the existence temperature of NAT (TNAT). State-of-the-art simulations using CLaMS (Chemical Lagrangian Model of the Stratosphere; Grooß et al., 2014) suggest considerably smaller particles. We consider the hypothesis that the simulation reproduces the NAT particle masses in a realistic way, but that real NAT particles may have larger apparent sizes compared to compact spherical particles, e.g. due to non-compact m ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Publikationstyp Zeitschriftenaufsatz
Jahr 2014
Sprache Englisch
Identifikator ISSN: 1680-7316, 1680-7324
URN: urn:nbn:de:swb:90-459578
KITopen ID: 1000045957
HGF-Programm 12.04.03; LK 01
Erschienen in Atmospheric chemistry and physics
Band 14
Heft 20
Seiten 11525-11544
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
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