HR: 16:30h
AN: A52F-02    [PDF]
TI: Multi-Year Simulations of the Middle Atmosphere with NOGAPS-ALPHA
AU: * McCormack, J P
EM: mccormack@nrl.navy.mil
AF: E.O. Hulburt Center for Space Research, Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375 United States
AU: Coy, L
AF: E.O. Hulburt Center for Space Research, Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375 United States
AU: Eckermann, S D
AF: E.O. Hulburt Center for Space Research, Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375 United States
AU: Allen, D R
AF: Remote Sensing Division, Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375 United States
AU: Hogan, T
AF: Marine Meteorology Divsion, Naval Research Laboratory, 7 Grace Hopper Ave., Stop 2, Monterey, CA 93943
AU: Kim, Y
AF: Marine Meteorology Divsion, Naval Research Laboratory, 7 Grace Hopper Ave., Stop 2, Monterey, CA 93943
AB: The Navy's Operational Global Atmospheric Prediction System (NOGAPS) is the Department of Defense's global weather forecasting and data assimilation system. The centerpiece of this system is a spectral numerical weather prediction (NWP) model of the physical processes driving the atmospheric circulation. The current operational version of the NOGAPS model provides output from the surface up to $\sim$10 hPa (approx. 30 km altitude). A major research effort is presently underway to extend NOGAPS forecasting capabilities to higher altitudes, thereby improving weather forecasts at all levels by fully resolving important global circulation patterns throughout the full depth of the atmosphere. This effort has led to the development of the NOGAPS-Advanced Level Physics High Altitude (NOGAPS-ALPHA) model. NOGAPS-ALPHA extends to 0.01 hPa (approx. 80 km) and contains a number of new physics modules necessary for middle atmospheric applications, including updated radiative heating, gravity wave drag, and constituent transport with parameterized photochemistry. The longer time scales associated with middle atmospheric processes require multi-year simulations in order to characterize model performance. Results of a 5-year simulation with NOGAPS-ALPHA at T79L54 will be presented, describing the seasonal evolution of stratospheric winds and temperatures and their impact on tropospheric NWP.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere--composition and chemistry
DE: 3300 METEOROLOGY AND ATMOSPHERIC DYNAMICS
DE: 3334 Middle atmosphere dynamics (0341, 0342)
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting