Open AccessStratospheric aerosol surface area and volume inferred from HALOE, CLAES, and ILAS measurements
Author(s) -
Hervig Mark E.,
Deshler Terry
Publication year - 1998
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/98jd01962
Subject(s) - aerosol , occultation , polar , spectrometer , atmospheric sciences , volume (thermodynamics) , environmental science , stratosphere , sulfate aerosol , atmosphere (unit) , materials science , meteorology , geology , optics , physics , quantum mechanics , astronomy
Relationships are presented for converting remote measurements of stratospheric aerosols to surface area and volume densities. Measurements from the Halogen Occultation Experiment (HALOE), the cryogenic limb array etalon spectrometer (CLAES), and the improved limb atmospheric spectrometer (ILAS) were considered. The relationships were derived using an extensive record of in situ aerosol size distribution measurements made in sulfate aerosols and in polar stratospheric clouds (PSCs). Conversions were derived for sulfate aerosols using the appropriate refractive indices, and for PSCs using the refractive indices for either nitric acid trihydrate or liquid ternary H 2 SO 4 ‐H 2 O‐HNO 3 aerosols. Coincident measurements from HALOE, CLAES, and in situ particle counters are in generally good agreement at middle latitudes, for surface area and volume. Analysis of CLAES measurements under cold polar conditions suggests that these data should be used with caution.