Observation of hydroperoxy radical HO2 in the upper atmosphere by SMILES
Abstract
The HO_{2} radicals have an important role to control the oxidation capacity in the Earth and planetary atmosphere. We provide a first diurnal photo-chemical behavior of HO_{2} in the wide vertical range between stratosphere and lower thermosphere of the Earth by spectroscopic observation using a instrument optimized for the detection of minor atmospheric radical species, named Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES), from International Space Station (ISS). An unexpected behavior of HO_{2} was detected above mesopause (about 80 km) with a peak abundance after the sunset time, which was completely different from known diurnal behavior in the stratosphere and the mesosphere. We will report the photo-chemical behavior of HO_{2} in the upper atmosphere.
- Publication:
-
41st COSPAR Scientific Assembly
- Pub Date:
- July 2016
- Bibcode:
- 2016cosp...41E.945K