HR: 0800h
AN: A51D-0089    [Abstracts]
TI: Cross Validation of Tropospheric Carbon Monoxide Measurements Between AIRS and MOPITT on a Global Basis
AU: * Warner, J X
EM: juying@umbc.edu
AF: UMBC/JCET, Dept. of Physics 1000 Hilltop Circle, Baltimore, MD 21250 United States
AU: McMillan, W W
EM: mcmillan@umbc.edu
AF: UMBC/JCET, Dept. of Physics 1000 Hilltop Circle, Baltimore, MD 21250 United States
AU: Barnet, C
EM: chris.barnet@noaa.gov
AF: NOAA/NESDIS, 5200 Auth Rd, Camp Springs, MD 20746 United States
AU: Comer, M M
EM: michele@jcet.umbc.edu
AF: UMBC/JCET, Dept. of Physics 1000 Hilltop Circle, Baltimore, MD 21250 United States
AU: Strow, L L
EM: strow@umbc.edu
AF: UMBC/JCET, Dept. of Physics 1000 Hilltop Circle, Baltimore, MD 21250 United States
AU: Edwards, D
EM: edwards@ucar.edu
AF: NCAR/ACD, 1850 Table Mesa Rd, Boulder, CO 80301 United States
AU: Emmons, L
EM: emmons@ucar.edu
AF: NCAR/ACD, 1850 Table Mesa Rd, Boulder, CO 80301 United States
AU: Deeter, M
EM: mnd@eos.ucar.edu
AF: NCAR/ACD, 1850 Table Mesa Rd, Boulder, CO 80301 United States
AU: Gille, J
EM: gille@ucar.edu
AF: NCAR/ACD, 1850 Table Mesa Rd, Boulder, CO 80301 United States
AB: Tropospheric carbon monoxide has been observed from space by the two instruments: MOPITT onboard EOS/TERRA since March 2000 and AIRS onboard EOS/AQUA since September 2002. The measurement principles and the retrieval methods to obtain the tropospheric CO are different for these instruments. Although each instrument is undergoing a continued effort to validate its products against the air-borne and surface measurements, the cross-validation between the two instruments provides valuable information where traditional validation is not possible. Cross-validated global CO products will help build the foundation for a continued CO climate record from different space-borne instruments. The two global datasets are correlated under various chemical and meteorological conditions and the implications are discussed. The tropospheric CO distributions and variabilities are also discussed from the point-of-view of comparisons. The two measurements show strong agreement on the global distributions of CO and seasonal variations. CO is higher in the Northern hemisphere especially in the spring when associated with higher emissions due to more frequent biomass burning events and industrial pollution, combined with lower sink for CO. At late summer, CO concentration in the Northern hemisphere decreases due to the increased OH amount and reaches a comparable level as in the Southern Hemisphere. In-situ CO profiles measured from INTEX-A will be compared with both AIRS and MOPITT profiles and the vertical information contents for both satellite instruments will be discussed. Continued study will provide insights to understand the differences between AIRS and MOPITT CO global measurements and the impact on climate studies. This study will also improve our understanding on remote sensing principles and retrieval techniques that will benefit algorithm development for future instruments.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0322 Constituent sources and sinks
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005