Description

Forecast model

Japanese Atmospheric General circulation model for Upper Atmosphere Research (JAGUAR; Watanabe and Miyahara, 2009)
Model topz ≈150 km
Horizonal resolutionT42 (Δx = Δy = 2.8125° ≈300 km)
Vertical resolutionL124 (Δz ≈1 km)
GW parameterizationOrographic: McFarlane (1987)
Non-orographic: Hines (1997) with source from Watanabe (2008)
Physical parameterization for the MLT regionNon-LTE and O2/O3 heating, ion drag, chemical heating, dissipation heating, and molecular diffusion
Boundary conditionO3: UGAMP (Li and Shine, 1999)
SST & sea ice: HadISST (Rayner et al., 2003)

Observations

PrepBUFRAura MLSTIMED SABERDMSP SSMIS
Height≈0–30 km
(1000–1 hPa)
≈15–90 km
(83–0.002 hPa)
≈15–110 km
(100–0.0001 hPa)
≈30–80 km
(10–0.01 hPa)
VariableT, u, v, RH, and PsTTBrightness T
Conventional datasetSun-synchronous orbitNon-sun-synchronous orbitDense horisontal distribution

Data assimilation

4D-LETKF (Miyoshi and Yamane, 2007)
Number of ensemble50
analysis updateIAU (Bloom et al., 1996)