HR: 0800h
AN: GC41A-0380    [Abstracts]
TI: Comparison of TRMM and Water District Rain Rates over New Mexico
AU: * Chiu, L S
EM: lchiu@gmu.edu
AF: George Mason University, SCS/CEOSR, MSN 5C3, 4400 University Dr., Fairfax, VA 22030 United States
AU: * Chiu, L S
EM: lchiu@gmu.edu
AF: NASA/Goddard Space Fligher Center, Data and Information Services Code 610.2 NASA/GSFC Grenbelt Road, Greenbelt, MD 20771 United States
AU: Liu, Z
EM: zliu@daac.gsfc.nasa.gov
AF: George Mason University, SCS/CEOSR, MSN 5C3, 4400 University Dr., Fairfax, VA 22030 United States
AU: Liu, Z
EM: zliu@daac.gsfc.nasa.gov
AF: NASA/Goddard Space Fligher Center, Data and Information Services Code 610.2 NASA/GSFC Grenbelt Road, Greenbelt, MD 20771 United States
AU: Vongsaard, J
EM: jearanai@scs.gmu.edu
AF: George Mason University, SCS/CEOSR, MSN 5C3, 4400 University Dr., Fairfax, VA 22030 United States
AU: Morain, S
EM: smorain@edac.unm.edu
AF: University of New Mexico, Earth Data Analysis Center University of New Mexico, Albuquerque, NM 87131 United States
AU: Budge, A
EM: abudge@edac.unm.edu
AF: University of New Mexico, Earth Data Analysis Center University of New Mexico, Albuquerque, NM 87131 United States
AU: Neville, P
EM: pneville@edac.unm.edu
AF: University of New Mexico, Earth Data Analysis Center University of New Mexico, Albuquerque, NM 87131 United States
AU: Bales, C
EM: cbales@edac.unm.edu
AF: University of New Mexico, Earth Data Analysis Center University of New Mexico, Albuquerque, NM 87131 United States
AB: We compare monthly/seasonal rain rates derived from the TRMM Version 5 and 6 (V5, V6) TRMM Precipitation Radar (TPR), TRMM Microwave Imager (TMI), TRMM Combined Instrument (TCI), TRMM calibrated IR rain estimates (3B42) and TRMM merged gauge and satellite analysis (3B43) algorithms over New Mexico (NM) with rain gauge analyses provided by the NM water districts (WD). The average rain rates over the NM region for 1998-2002 are 0.91 mm/d for WD and 0.75, 1.38, 1.49, 1.27, and 1.07 mm/d for V5 3B43, 3B42, TMI, PR and TCA; and 0.74, 1.38, 0.87 and 0.97 mm/d for V6 3B43, TMI, TPR and TCA, respectively. Correlation analyses show that the WD rain rates vary in phase, with higher correlation between neighboring WDs. Comparison of V5 3B43 with WD rain rates and daily TRMM mission index suggests that a low bias of V5 3B43 for summer to early fall may be due to the non-inclusion of some rain events in the operational gauge analyses used in its production. High temporal correlations (>0.8) exist between WD and the combined algorithms (3B42, 3B43 and TCA for both V5 and V6) while satellite instrument algorithms (PR, TMI and TCI) are correlated best among themselves at the monthly scale. Paired-t tests of the monthly time series show that V5 3B42 and TMI are statistically different from the WD rain rates while no significant difference exists between WD and the other products. The agreements between the TRMM satellite and WD gauge estimates are best for the spring and fall and worst for winter and summer. The reduction in V6 TMI and TPR rain rates (7 and 31 percent, respectively) compared to V5 results in better agreement between WD estimates and TMI in winter and TPR during summer.
DE: 1640 Remote sensing (1855)
DE: 1854 Precipitation (3354)
DE: 1855 Remote sensing (1640)
DE: 1876 Water budgets
DE: 3354 Precipitation (1854)
SC: Global Climate Change [GC]
MN: Fall Meeting 2005