HR: 11:20h
AN: A52A-03 INVITED     [Abstracts]
TI: Long-term atmospheric constituent and temperature change from 13-plus years of HALOE observations
AU: * Russell, J M
EM: james.russell@hamptonu.edu
AF: Center for Atmospheric Sciences, Hampton University, Hampton, VA 23668 United States
AU: Anderson, J
EM: john.anderson@hampotonu.edu
AF: Center for Atmospheric Sciences, Hampton University, Hampton, VA 23668 United States
AU: Remsberg, E E
EM: ellis.e.remsberg@nasa.gov
AF: NASA, Langley Research Center, Hampton, VA 23681 United States
AB: The Halogen Occultation Experiment (HALOE) has been operating on the Upper Atmosphere Research Satellite without flaw since it was first turned on October 11, 1991. The experiment uses the broadband and gas filter radiometry instrument techniques and the solar occultation experiment approach to measure vertical profiles of temperature, HCl, HF, O3, NO, NO2, CH4, H2O and aerosols from the upper troposphere in some cases (i.e. H2O and O3) to the lower thermosphere for other parameters (e.g. NO). The experiment has operated for over thirteen years at this point and has provided an extensive long-term data set for studies of trends. The basic measurement for a solar occultation experiment is a ratio of endoatmospheric to exoatmospheric signals making HALOE virtually self calibrating. Also, its low noise gives high measurement precision providing an attractive data set for studies of long-term atmospheric changes and variability. Many scientific studies have been done using HALOE data including polar vertical descent, polar vortex phenomena, dynamics, NOx, Clx and HOx chemistry, effects of solar storms on stratospheric NO and O3, the relation between Lyman-Alpha and high altitude water vapor, polar mesospheric cloud characteristics and trends in H2O, HCl, HF, O3, NO2, CH4 and temperature. The data were also used extensively in the SPARC ozone and water vapor trend study reports. This paper will focus on long-term atmospheric change including the state of the instrument and observed trends in atmospheric parameters.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0350 Pressure, density, and temperature
DE: 0365 Troposphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2005 Joint Assembly