Laboratory Measurements of Optical Properties of Polar Stratospheris Clouds
Abstract
The infrared spectra (20-1.25 μm) of various types of polar stratospheric cloud (PSC) particles (including nitric acid hydrates, supercooled ternary solution (STS) and sulphate aerosols) have been recorded in the laboratory using a high-resolution Fourier transform spectrometer with simultaneous measurements in the near-IR and visible (450-1100 nm) using fibre-optic CCD spectrometers. The aerosols were contained in a 75 dm3, variable-temperature (182-300 K) spectroscopic cell. Infrared spectra of the PSC particles and gas-phase components (e.g. H2O and HNO3) were recorded. These quantitative extinction spectra, together with values of temperature, pressure and uncertainty estimates, are being used to derive infrared and visible refractive indices for application to the detection and mapping of PSC events in the atmosphere from ground- and satellite-based optical remote sensing.
- Publication:
-
EGS - AGU - EUG Joint Assembly
- Pub Date:
- April 2003
- Bibcode:
- 2003EAEJA....11638M