Nitric acid trihydrate (NAT) formation at low NAT supersaturations in Polar Stratospheric Clouds (PSCs)

A PSC was detected on 6 February 2003 in the Arctic stratosphere by in-situ measurements onboard the high-altitude research aircraft Geophysica. Low number densities (similar to 10(-4) cm(-3)) of small nitric acid (HNO3) containing particles (d< 6 mu m) were observed at altitudes between 18 and 2...

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Main Authors: Voigt, C., Schlager, H., Konopka, Paul, Schiller, C., Shur, G., Peter, T., Luo, B., Dörnbrack, A., Roiger, A., Stock, P., Curtius, J., Vössing, H., Borrmann, S., Davies, S.
Format: Article in Journal/Newspaper
Language:English
Published: EGU 2005
Subjects:
Online Access:https://juser.fz-juelich.de/record/45971
https://juser.fz-juelich.de/search?p=id:%22PreJuSER-45971%22
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author Voigt, C.
Schlager, H.
Konopka, Paul
Schiller, C.
Shur, G.
Peter, T.
Luo, B.
Dörnbrack, A.
Roiger, A.
Stock, P.
Curtius, J.
Vössing, H.
Borrmann, S.
Davies, S.
author_facet Voigt, C.
Schlager, H.
Konopka, Paul
Schiller, C.
Shur, G.
Peter, T.
Luo, B.
Dörnbrack, A.
Roiger, A.
Stock, P.
Curtius, J.
Vössing, H.
Borrmann, S.
Davies, S.
author_sort Voigt, C.
collection Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources)
description A PSC was detected on 6 February 2003 in the Arctic stratosphere by in-situ measurements onboard the high-altitude research aircraft Geophysica. Low number densities (similar to 10(-4) cm(-3)) of small nitric acid (HNO3) containing particles (d< 6 mu m) were observed at altitudes between 18 and 20 km. Provided the temperatures remain below the NAT equilibrium temperature TNAT, these NAT particles have the potential to grow further and to remove HNO3 from the stratosphere, thereby enhancing polar ozone loss. Interestingly, the NAT particles formed in less than a day at temperatures just slightly below T-NAT ( T> T-NAT- 3.1 K). This unique measurement of PSC formation at extremely low NAT saturation ratios (S-NAT less than or similar to 10) constrains current NAT nucleation theories. We suggest, that the NAT particles have formed heterogeneously, but for certain not on ice. Conversely, meteoritic particles may be favorable candidates for triggering NAT nucleation at the observed low number densities.
format Article in Journal/Newspaper
genre Arctic
genre_facet Arctic
geographic Arctic
geographic_facet Arctic
id ftfzjuelichnvdb:oai:juser.fz-juelich.de:45971
institution Open Polar
language English
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op_relation info:eu-repo/semantics/altIdentifier/hdl/2128/742
info:eu-repo/semantics/altIdentifier/issn/1680-7316
info:eu-repo/semantics/altIdentifier/wos/WOS:000229615500002
https://juser.fz-juelich.de/record/45971
https://juser.fz-juelich.de/search?p=id:%22PreJuSER-45971%22
op_rights info:eu-repo/semantics/openAccess
op_source Atmospheric chemistry and physics 5, 1371-1380 (2005).
publishDate 2005
publisher EGU
record_format openpolar
spelling ftfzjuelichnvdb:oai:juser.fz-juelich.de:45971 2025-01-16T20:36:43+00:00 Nitric acid trihydrate (NAT) formation at low NAT supersaturations in Polar Stratospheric Clouds (PSCs) Voigt, C. Schlager, H. Konopka, Paul Schiller, C. Shur, G. Peter, T. Luo, B. Dörnbrack, A. Roiger, A. Stock, P. Curtius, J. Vössing, H. Borrmann, S. Davies, S. DE 2005 https://juser.fz-juelich.de/record/45971 https://juser.fz-juelich.de/search?p=id:%22PreJuSER-45971%22 eng eng EGU info:eu-repo/semantics/altIdentifier/hdl/2128/742 info:eu-repo/semantics/altIdentifier/issn/1680-7316 info:eu-repo/semantics/altIdentifier/wos/WOS:000229615500002 https://juser.fz-juelich.de/record/45971 https://juser.fz-juelich.de/search?p=id:%22PreJuSER-45971%22 info:eu-repo/semantics/openAccess Atmospheric chemistry and physics 5, 1371-1380 (2005). info:eu-repo/classification/ddc/550 J info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2005 ftfzjuelichnvdb 2024-08-05T23:55:45Z A PSC was detected on 6 February 2003 in the Arctic stratosphere by in-situ measurements onboard the high-altitude research aircraft Geophysica. Low number densities (similar to 10(-4) cm(-3)) of small nitric acid (HNO3) containing particles (d< 6 mu m) were observed at altitudes between 18 and 20 km. Provided the temperatures remain below the NAT equilibrium temperature TNAT, these NAT particles have the potential to grow further and to remove HNO3 from the stratosphere, thereby enhancing polar ozone loss. Interestingly, the NAT particles formed in less than a day at temperatures just slightly below T-NAT ( T> T-NAT- 3.1 K). This unique measurement of PSC formation at extremely low NAT saturation ratios (S-NAT less than or similar to 10) constrains current NAT nucleation theories. We suggest, that the NAT particles have formed heterogeneously, but for certain not on ice. Conversely, meteoritic particles may be favorable candidates for triggering NAT nucleation at the observed low number densities. Article in Journal/Newspaper Arctic Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) Arctic
spellingShingle info:eu-repo/classification/ddc/550
J
Voigt, C.
Schlager, H.
Konopka, Paul
Schiller, C.
Shur, G.
Peter, T.
Luo, B.
Dörnbrack, A.
Roiger, A.
Stock, P.
Curtius, J.
Vössing, H.
Borrmann, S.
Davies, S.
Nitric acid trihydrate (NAT) formation at low NAT supersaturations in Polar Stratospheric Clouds (PSCs)
title Nitric acid trihydrate (NAT) formation at low NAT supersaturations in Polar Stratospheric Clouds (PSCs)
title_full Nitric acid trihydrate (NAT) formation at low NAT supersaturations in Polar Stratospheric Clouds (PSCs)
title_fullStr Nitric acid trihydrate (NAT) formation at low NAT supersaturations in Polar Stratospheric Clouds (PSCs)
title_full_unstemmed Nitric acid trihydrate (NAT) formation at low NAT supersaturations in Polar Stratospheric Clouds (PSCs)
title_short Nitric acid trihydrate (NAT) formation at low NAT supersaturations in Polar Stratospheric Clouds (PSCs)
title_sort nitric acid trihydrate (nat) formation at low nat supersaturations in polar stratospheric clouds (pscs)
topic info:eu-repo/classification/ddc/550
J
topic_facet info:eu-repo/classification/ddc/550
J
url https://juser.fz-juelich.de/record/45971
https://juser.fz-juelich.de/search?p=id:%22PreJuSER-45971%22