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RISSome Experiments in Variational Normal Mode Initialization in Data Assimilation
Publisher: American Meteorological Society
Abstract: A variational formalism for constrained normal mode initialization has been used in the ANMRC data assimilation scheme. A 5-day data assimilation cycle using FGGE level II data shows that the constrained scheme leads to a ...
A Scheme to Retain the Hadley Circulation During Nonlinear Normal Mode Initialization
Publisher: American Meteorological Society
Abstract: A modified nonlinear normal mode initialization scheme is proposed which provides a possible solution to a major problem associated with nonlinear normal mode initialization. The modified scheme retains the Hadley circulation ...
Nonlinear Instability and Error Growth in Northern Hemisphere Three-Dimensional Flows: Cyclogenesis, Onset-of-Blocking and Mature Anomalies
Publisher: American Meteorological Society
Abstract: The nonlinear interactions of an initial small amplitude instability mode with a three-dimensional climatological flow (for Northern Hemisphere, January 1978), an which it is growing are studied in a multilevel nonlinear ...
Numerical Weather Prediction Studies from the FGGE Southern Hemisphere Data Base
Publisher: American Meteorological Society
Abstract: The quality of numerical weather prediction available for the Southern Hemisphere from the FGGE data base has been examined. The Australian Numerical Meteorology Research Centre (ANMRC) spectral prediction model has been ...
Incremental Linear Normal Mode Initialization in Four-Dimensional Data Assimilation
Publisher: American Meteorological Society
Abstract: A five-day data assimilation experiment is described in which linear normal mode initialization is used to suppress the transient gravity waves. The initialization is performed on increments to the model fields resulting ...
ANMRC Data Assimilation for the Southern Hemisphere
Publisher: American Meteorological Society
Abstract: A data assimilation scheme for the Southern Hemisphere has been incorporated into the ANMRC hemi-insertion frequency of six hours and has been performed with the FGGE data base for the period 17?26 and the model has been ...
The Flow during TOGA COARE as Diagnosed by the BMRC Tropical Analysis and Prediction System
Publisher: American Meteorological Society
Abstract: The evolution of the large-scale flow through the four-month intensive observing period of TOGA COARE is documented from large-scale numerical analyses and GMS cloud imagery produced by the Australian Bureau of Meteorology ...
The Australian Air Quality Forecasting System. Part III: Case Study of a Melbourne 4-Day Photochemical Smog Event
Publisher: American Meteorological Society
Abstract: A 4-day photochemical smog event in the Melbourne, Victoria, Australia, region (6?9 March 2001) is examined to assess the performance of the Australian Air Quality Forecasting System (AAQFS). Although peak ozone concentrations ...
The Australian Air Quality Forecasting System. Part II: Case Study of a Sydney 7-Day Photochemical Smog Event
Publisher: American Meteorological Society
Abstract: The performance of the Australian Air Quality Forecasting System (AAQFS) is examined by means of a case study of a 7-day photochemical smog event in the Sydney region. This was the worst smog event for the 2000/ 01 oxidant ...
Dynamical Seasonal Predictability of the Asian Summer Monsoon
Publisher: American Meteorological Society
Abstract: Ensembles of hindcasts from seven models are analyzed to evaluate dynamical seasonal predictability of 850-hPa wind and rainfall for the Asian summer monsoon (ASM) during 1987, 1988, and 1993. These integrations were ...