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Refractive indices of aerosols in the upper troposphere and lower stratosphere
Author(s) -
Baumgardner Darrel,
Dye James E.,
Gandrud Bruce,
Barr Keith,
Kelly Ken,
Chan K. Roland
Publication year - 1996
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/96gl00707
Subject(s) - stratosphere , troposphere , atmospheric sciences , refractive index , altitude (triangle) , range (aeronautics) , aerosol , environmental science , latitude , meteorology , optics , geology , materials science , physics , geodesy , geometry , mathematics , composite material
A new instrument for simultaneously measuring aerosol diameter from 0.4–10 µm and the refractive index between 1.30–1.60 has recently been flown on the NASA ER‐2 aircraft during a stratospheric measurement campaign. Average stratospheric refractive indices varied from 1.40 to 1.42 over a latitude range from 70°S to 50°N and from 1.34 to 1.46 over a vertical range from 4–20 km. The measured stratospheric refractive indices do not agree well with theoretical predictions and vertical profiles suggest the presence of non‐spherical or absorbing particles in the altitude range of 7–9 km.