HR: 1340h
AN: G43A-0920    [Abstracts]
TI: Comparisons of regional water vapor measurements derived from AIRS soundings and GPS receivers in Japan and Southern California
AU: * Granger, S
EM: Stephanie.L.Granger@jpl.nasa.gov
AU: Fetzer, E
EM: Eric.J.Fetzer@jpl.nasa.gov
AU: Fielding, E
EM: Eric.J.Fielding@jpl.nasa.gov
AU: Manning, E
EM: Evan.M.Manning@jpl.nasa.gov
AU: Moore, A
EM: Angelyn.W.Moore@jpl.nasa.gov
AU: Owen, S
EM: Susan.Owen@jpl.nasa.gov
AU: Webb, F
EM: Frank.H.Webb@jpl.nasa.gov
AB: Water vapor measurements from the Atmospheric InfraRed Sounder (AIRS) are compared with water vapor estimates derived from ground-based Global Positioning System (GPS) receivers at several sites in Japan and Southern California for January 2005. AIRS is a polar orbiting hyper-spectral infrared sounder flown aboard NASA's Earth Observing System (EOS) Aqua platform providing high resolution 3-dimensional observations of water vapor, temperature and trace gases from space. AIRS produces both daytime and night time water vapor retrievals and is able to generate some retrievals in the presence of clouds. GPS measurements from the Japan GEONET network and the Southern California Integrated GPS Network (SCIGN) of ground-based receivers are processed at the Jet Propulsion Laboratory (JPL) using the Global Mapping Function (GMF) described by Boehm et al. (2005). A robust method (Bevis et al. 1992) is used to derive water vapor from tropospheric path delay measured at several GPS receiver sites for January 2005. In order to compare GPS-derived water vapor with AIRS-retrieved water vapor, we use surface pressure estimates from the National Center for Environmental Prediction (NCEP) reanalysis to convert GPS nominal wet and dry components to real water vapor and hydrostatic estimates. GPS-derived water vapor measurements are compared with AIRS retrieved quantities, and both are used to estimate the spatial and temporal distribution of water vapor over the region.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 1220 Atmosphere monitoring with geodetic techniques (6952)
DE: 1223 Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions (0762, 1218, 3319, 4550)
SC: Geodesy [G]
MN: 2007 Fall Meeting