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MM‐wave observations of stratospheric HCN at tropical latitudes
Author(s) -
Jaramillo M.,
de Zafra R. L.,
Barrett J. W.,
Parrish A.,
Solomon P. M.
Publication year - 1988
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/gl015i003p00265
Subject(s) - mixing ratio , atmospheric sciences , stratosphere , latitude , altitude (triangle) , middle latitudes , environmental science , atmospheric research , climatology , atmospheric chemistry , volume (thermodynamics) , geology , meteorology , ozone , physics , geodesy , geometry , mathematics , quantum mechanics
We have measured middle and upper stratospheric HCN using ground‐based mm‐wave emission spectroscopy, during a series of observations made in Mauna Kea, Hawaii, in June of 1986. We find a volume mixing ratio of 190±40 pptv at ∼40 km, and a decrease of concentration with altitude that is considerably slower than that predicted by current models. This could be an indication of an atmospheric source of HCN as yet unidentified.