HR: 0800h
AN: A51D-0811    [Abstracts]
TI: SAGE I, II, and III Data Available From the Atmospheric Sciences Data Center
AU: * Morris, K L
EM: k.l.morris@larc.nasa.gov
AF: Atmospheric Sciences Data Center, NASA Langley Research Center MS 157D 2 South Wright Street, Hampton, VA 23681-2199 United States
AB: The Atmospheric Sciences Data Center (ASDC) at NASA Langley Research Center archives data from Stratospheric Aerosol and Gas Experiment (SAGE) I, II, and III. These data span approximately 25 years and can be used to study long term trends such as the effects of volcanic eruptions and changes in ozone levels. The SAGE I, II, and III projects cover the time span February 1979 through the present and provide vertical distributions of nitrogen dioxide, ozone, water vapor and aerosols. The SAGE I and II projects use Sun Photometers to collect these measurements. The SAGE I instrument had four spectral channels centered at wavelengths of 1000, 600, 450, and 385 nanometers for nearly global measurements of aerosol extinction profiles and ozone and nitrogen dioxide concentration profiles. SAGE II data contain profiles of aerosol extinction at 1020, 525, 453, and 385 nanometers(nm) and number density profiles of ozone, nitrogen dioxide, and molecular density, water vapor mixing ratio, and aerosol surface area and effective radius at a vertical resolution of 0.5km. It also includes retrieved molecular density from 40-75km on a 0.5km grid. The ASDC continues to receive and archive the SAGE II data. SAGE III, which was launched as part of the NASA Earth Observing System program on December 10, 2001, obtains profile measurements of aerosol extinction at eight wavelengths, nitrogen trioxide, chlorine dioxide, clouds, temperature and pressure in the mesosphere, stratosphere, and upper troposphere with a vertical resolution of 0.5 - 1 km resolution. SAGE III collects measurements during both solar and lunar occultation events. Solar event species are aerosol, water vapor, nitrogen dioxide, ozone, temperature and pressure. Cloud measurements are also collected during solar events. Lunar event species are chlorine dioxide, nitrogen dioxide, nitrogen trioxide, and ozone. These measurements are collected using a grating spectrometer. In addition to the SAGE data, the NASA Langley ASDC archives data from two other solar occultation instruments that expands the coverage area to the polar regions. The Polar Ozone and Aerosol Measurement (POAM) II instrument measures the vertical distribution of atmospheric ozone, nitrogen dioxide, and aerosol extinction and covers the time span October 1993 through November 1996. The Stratospheric Aerosol Measurement (SAM) II project measures vertical distribution of stratospheric aerosols in the polar regions of both hemispheres and covers the time span October 1978 through December 1993. These data along with documentation and read software are available from the NASA Langley ASDC at http://eosweb.larc.nasa.gov.
UR: http://eosweb.larc.nasa.gov
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 1610 Atmosphere (0315, 0325)
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting