HR: 17:48h
AN: A44A-10    [Abstracts]
TI: Validation of AIRS-based dust property retrievals using data from the portable infrared aerosol transmission experiment (PIRATE) - Caribbean and AERONET
AU: Ricchiazzi, P
EM: paul@icess.ucsb.edu
AF: Institute for Computational Earth System Science, UCSB 6804 Ellison Hall, Santa Barbara, CA 93013 United States
AU: * Thomas, M
EM: thomas@mrcsb.com
AF: Institute for Computational Earth System Science, UCSB 6804 Ellison Hall, Santa Barbara, CA 93013 United States
AU: * Thomas, M
EM: thomas@mrcsb.com
AF: Department of Geography, UCSB, 3611 Ellison Hall, Santa Barbara, CA 93013 United States
AU: * Thomas, M
EM: thomas@mrcsb.com
AF: ATK Mission Research, PO Drawer 719, Santa Barbara, CA 93102 United States
AU: Gautier, C
EM: gautier@icess.ucsb.edu
AF: Institute for Computational Earth System Science, UCSB 6804 Ellison Hall, Santa Barbara, CA 93013 United States
AU: Gautier, C
EM: gautier@icess.ucsb.edu
AF: Department of Geography, UCSB, 3611 Ellison Hall, Santa Barbara, CA 93013 United States
AU: Michaelson, J
EM: joel@geog.ucsb.edu
AF: Department of Geography, UCSB, 3611 Ellison Hall, Santa Barbara, CA 93013 United States
AU: Peterson, P
EM: pete@icess.ucsb.edu
AF: Institute for Computational Earth System Science, UCSB 6804 Ellison Hall, Santa Barbara, CA 93013 United States
AB: The retrieval of mineral aerosol (dust) properties near Puerto Rico in June 2004 using a physically-based inversion algorithm with AIRS fluxes is presented. The retrievals are validated using results from the Portable Infrared Aerosol Transmission Experiment (PIRATE) - Caribbean and an AERONET sensor. PIRATE - Caribbean was a ground-based experiment that measured the infrared transmission through dust transported across the Atlantic Ocean from the Sahara Desert. A Fourier Transform Infrared (FTIR) spectrometer was used in Boqueron, Puerto Rico from June 23 through June 30, 2004 as a high-resolution infrared sun photometer. The visible aerosol optical depth (AOD) at the time of each FTIR measurement was taken from a nearby AERONET sensor at La Parguera, Puerto Rico. The FTIR recorded the direct solar radiance from 3 to 14 microns at 4 cm-1 spectral resolution. The measured infrared extinction efficiency of the dust is incorporated into a new AIRS-based dust property retrieval algorithm which, determines the dust AOD at 550 nm, the dust effective radius, the dust effective temperature, and the surface temperature. The retrieved AOD is compared with the AERONET results, and the retrieved surface temperatures are compared with the 11.1 micron AIRS brightness temperatures. During high AOD episodes, the 11.1 micron AIRS brightness temperature is over 2 C cooler than the actual surface temperature, indicating the presence of dust can lead to erroneous surface temperature retrievals unless the dust properties are included in the retrievals.
DE: 5199 General or miscellaneous
DE: 6904 Atmospheric propagation
DE: 3359 Radiative processes
DE: 3394 Instruments and techniques
DE: 0305 Aerosols and particles (0345, 4801)
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting