Mesospheric ionization and depletion

Spear, Kathleen; Solomon, Susan

doi:10.1016/0032-0633(87)90013-4

Cited by 2 publications

(1 citation statement)

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“…Thomas et al [] found that the ozone density derived from O 2 dayglow observed by the SME satellite decreased during the SPE on 13 July 1982; the maximum depletion was 70%. The depletion of O 2 dayglow below 80 km was due to odd hydrogen production and associated depletion of ozone [ Spear and Solomon , ]. Degenstein et al [] used data observed by the Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS) instrument on Odin satellite to investigate the variation of ozone during the SPE that occurred on 28 October 2003.…”

Section: Introductionmentioning

confidence: 99%

Effects of solar proton events on dayglow observed by the TIMED/SABER satellite

Gao

Smith

et al. 2017

JGR Space Physics

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The effect of solar proton events on the daytime O2 and OH airglows and ozone and atomic oxygen concentrations in the mesosphere is studied using data from the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER). Five events occurred in September 2005, December 2006, March 2012, May 2013, and June 2015 that satisfy two criteria: the maximum proton fluxes are larger than 1000 pfu, and daytime data in the high latitude region are available from SABER. The event in December 2006 is studied in detail, and the effects of all five events are compared in brief. The results indicate that all four parameters in the mesosphere decrease during the events. During the event in 2006, the maximum depletions of O2 and OH dayglow emission rates and ozone and atomic oxygen volume mixing ratios at 70 km are respectively 31.6%, 37.0%, 42.4%, and 38.9%. The effect of the solar proton event changes with latitude, longitude, and altitude. The depletions due to the stronger events are larger on average than those due to the weaker events. The depletions of both dayglow emission rates are weaker than those of ozone and atomic oxygen. The responses of O2 and OH nightglow emissions around their peak altitudes to the SPEs are not as strong and regular as those for dayglow in the mesosphere.

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Section: Introductionmentioning

confidence: 99%