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Tropical nitric acid clouds
Author(s) -
Hervig Mark,
McHugh Martin
Publication year - 2002
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 - 10.1029/2001gl014271
Subject(s) - nitric acid , tropopause , extinction (optical mineralogy) , cirrus , atmospheric sciences , occultation , environmental science , stratosphere , chemistry , geology , physics , mineralogy , inorganic chemistry , astrophysics
The presence of nitric acid clouds near the tropical tropopause was proposed over a decade ago, although little has been learned about them since. Particle extinction measurements at three wavelengths from the Halogen Occultation Experiment offer compelling evidence for the existence of nitric acid clouds near the tropical tropopause. Most of these clouds are consistent with nitric acid trihydrate, and a small fraction can be explained by liquid ternary H 2 SO 4 ‐H 2 O‐HNO 3 aerosols.