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The observation of nitric acid-containing particles in the tropical lower stratosphere

Popp, P.J. and Marcy, T.P. and Jensen, E.J. and Kärcher, B. and Fahey, D.W. and Gao, R.S. and Thompson, T.L. and Rosenlof, K.H. and Richard, E.C. and Herman, R.L. and Weinstock, E. M. and Smith, J.B. and May, R.D. and Vömel, H. and Wilson, J.C. and Heymsfield, A.J. and Mahoney, M.J. and Thompson, A.M. (2006) The observation of nitric acid-containing particles in the tropical lower stratosphere. Atmospheric Chemistry and Physics, 6, pp. 601-611. Copernicus Publications.

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Official URL: http://www.atmos-chem-phys.net/6/601/2006

Abstract

Airborne in situ measurements over the eastern Pacific Ocean in January 2004 have revealed a new category of nitric acid (HNO3)-containing particles in the tropical lower stratosphere. These particles are most likely composed of nitric acid trihydrate (NAT). They were intermittently observed in a narrow layer above the tropopause (18±0.1 km) and over a broad geographic extent (>1100 km). In contrast to the background liquid sulfate aerosol, these particles are solid, much larger (1.7-4.7 µm vs. 0.1µm in diameter), and significantly less abundant (<10-4 cm-3 vs. 10 cm-3). Microphysical trajectory models suggest that the NAT particles grow over a 6-14 day period in supersaturated air that remains close to the tropical tropopause and might be a common feature in the tropics. The small number density of these particles implies a highly selective or slow nucleation process. Understanding the formation of solid NAT particles in the tropics could improve our understanding of stratospheric nucleation processes and, therefore, dehydration and denitrification.

Item URL in elib:https://elib.dlr.de/22628/
Document Type:Article
Title:The observation of nitric acid-containing particles in the tropical lower stratosphere
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Popp, P.J.NOAA, Boulder, CO, USAUNSPECIFIED
Marcy, T.P.NOAA, Boulder, CO, USAUNSPECIFIED
Jensen, E.J.NASA, Moffett Field, CA, USAUNSPECIFIED
Kärcher, B.UNSPECIFIEDUNSPECIFIED
Fahey, D.W.NOAA, Boulder, CO, USAUNSPECIFIED
Gao, R.S.NOAA, Boulder, CO, USAUNSPECIFIED
Thompson, T.L.NOAA, Boulder, CO, USAUNSPECIFIED
Rosenlof, K.H.NOAA, Boulder, CO, USAUNSPECIFIED
Richard, E.C.Univ. of Colorado, Boulder, CO, USAUNSPECIFIED
Herman, R.L.California Inst. of Technology, Pasadena, CA, USAUNSPECIFIED
Weinstock, E. M.Harvard Univ., Cambridge, MA, USAUNSPECIFIED
Smith, J.B.Harvard Univ., Cambridge, MA, USAUNSPECIFIED
May, R.D.MayComm Instruments, San Dimas, CA, USAUNSPECIFIED
Vömel, H.NOAA, Boulder, CO, USAUNSPECIFIED
Wilson, J.C.Univ. of Denver, Denver, CO, USAUNSPECIFIED
Heymsfield, A.J.NCAR, Boulder, CO, USAUNSPECIFIED
Mahoney, M.J.California Inst. of Technology, Pasadena, CA, USAUNSPECIFIED
Thompson, A.M.Pennsylvania State Univ., University Park, PA, USAUNSPECIFIED
Date:2006
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:6
Page Range:pp. 601-611
Publisher:Copernicus Publications
Status:Published
Keywords:Tropen, Tropopause, Spurengastransport
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Freund, Jana
Deposited On:05 Jul 2007
Last Modified:02 May 2019 14:03

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