Abstract: We describe an extensive nudging (within-integration correction) experiment with a large and sophisticated atmospheric model. The model is an R30 version of the National Meteorological Center (NMC) T80 operational global ...

Abstract: Atmospheric budget calculations suffer from various observational and numerical errors. This paper demonstrates that all budget calculations applied to a large number of samples suffer from additional errors originating ...

Abstract: The paper presents die results of a study of the thermal budget of a monsoon depression that developed over the Bay of Bengal during the period 3?8 July 1979. The complete thermodynamic energy equation is considered, to ...

Abstract: Use general question considered in this is study is: To what extent does the maintenance of a correctly simulated quasi-stationary flow in a model influence the simulation of the transient part of the flow? and, in particular, ...

Abstract: The climate drift of various quantities associated with deep, planetary-scale, equilibrated, transient Rossby waves are estimated for the Southern Hemisphere extratropical summer as revealed by the DERF II (Dynamical ...

Abstract: A 10-year run was made with a reduced resolution (T40) version of NMC's medium range forecast model. The 12 monthly mean surface pressure fields averaged over 10 years are used to study the climatological seasonal ...

Abstract: An objective and practical limit of predictability for NWP models is proposed. The time T0 is said to be the limit of predictability if model forecast beyond T0 has no extra skill over persisting the T0 forecast. The ?skill? ...

Abstract: A method is proposed to calculate measures of forecast skill for high, medium and low temporal frequency variations in the atmosphere. This method is applied to a series of 128 consecutive 1 to 10-day forecasts produced ...

Abstract: This study examines the level and origin of seasonal forecast skill of surface air temperature in northern Europe. The forecasts are based on an empirical methodology, canonical correlation analysis (CCA), which is a method ...

Abstract: The authors have investigated the climatological annual cycle in surface pressure on the Tibetan Plateau in relation to the annual cycle in surface pressure at the lower surroundings (India and China). It is found that ...