Journal Article

PreJuSER-39894

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ice particle formation and sedimentation in the tropopause region : a case study based on in-situ measurements of total water during POLSTAR 1997

Schiller, C.FZJ* ; Afchine, A.FZJ* ; Eicke, N.FZJ* ; Feigl, C. ; Fischer, H. ; Giez, A. ; Konopka, V. E. ; Schlager, H. ; Tuitjer, F.FZJ* ; Wienhold, F. G. ; Zöger, M.FZJ*

1999
American Geophysical Union Washington, DC

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/20822  doi:10.1029/1999GL900337

Abstract: During the Polar Stratospheric Aerosol Experiment, total water was measured using an airborne Lyman-alpha fluorescence hygrometer. The inlet is designed for anisokinetic sampling, thus large ice particles are detected sensitively. During the flight on January 24, 1997, temperatures of 200 K occurred close to the tropopause. Within this cold area, the existence of large particles with radii greater than or equal to 4 mu m containing large amounts of water is observed. At the edge of this cloud, total water mixing ratios of 5-6 ppmv and close to saturation were measured at and below the tropopause. This observation together with analysis of the correlation of the H2O mixing ratio with other long-lived tracers indicates that the air masses had been dried by sedimentation of large ice particles.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

---

Contributing Institute(s):

1. Institut für Stratosphärische Chemie (ICG-1)

Research Program(s):

1. Stratosphärische Chemie (36.10.0)

Appears in the scientific report 1999

---

Database coverage:

---