| Volumes and Issues Contents of Issue 5 Special Issue |
www.atmos-chem-phys-discuss.net/4/5807/2004/
© Author(s) 2004. This work is licensed
under a Creative Commons License.
Technical Note: Evaporation of polar stratospheric cloud particles, in situ, in a heated inlet
University of Wyoming, Department of Atmospheric Science, USA
Abstract. In December 2001 and 2002 in situ aerosol measurements were made from balloon-borne platforms within polar stratospheric clouds (PSC) consisting of supercooled ternary solutions, nitric acid trihydrate and ice. Particle size (radius >0.15 m) and number concentrations were measured with two optical particle counters. One of these included an ~80 cm inlet heated to >244 K to obtain measurements, within PSCs, of the size distribution of the stratospheric particles upon which the PSC particles condensed. These measurements are compared to models that calculate the evaporation of PSC particles. The modeled evaporation for supercooled ternary solutions is in good agreement with the measurements. For nitric acid trihydrate it is uncertain what happens to the particle as it is brought to temperatures >50 K above its equilibrium temperature at stratospheric partial pressures. Here the modeled evaporation show too low evaporation compared to the measurements.
Discussion Paper (PDF, 457 KB) Interactive Discussion (Closed, 2 Comments) Final Revised Paper (ACP)
Citation: Eidhammer, T. and Deshler, T.: Technical Note: Evaporation of polar stratospheric cloud particles, in situ, in a heated inlet, Atmos. Chem. Phys. Discuss., 4, 5807-5829, 2004. Bibtex EndNote Reference Manager
