Abstract: Using time series of simple statistics, the homogeneity of a long-term Northern Hemisphere 500-mb dataset is assessed. Several discontinuities coinciding with major analysis changes were found which indicate that care must ...

Abstract: The available potential energy?kinetic energy budget of the Canadian Climate Centre general circulation model for the months of January. April, July and October is presented in terms of the two-dimensional wave-number. ...

Abstract: A comparison is made of the divergent wind analyses of the National Meteorological Center (NMC) and those of the ECMWF/WMO dataset produced by the European Centre for Medium Range Weather Forecasts (ECMWF). Using a reliability ...

Abstract: The cyclone event climatology is presented for a five-year simulation by the Canadian Climate Centre general circulation model. Winter season results are given for the extratropical regions of both the Northern and the ...

Abstract: The intraseasonal divergent and rotational kinetic energy (KE) budgets for the 30?60 day interval are calculated from the analyses of the European Centre for Medium Range Weather Forecasts/World Meteorological Organization ...

Abstract: The extratropical winter cyclone climatologies for the Northern and Southern Hemispheres are presented for a control, or 1 ? CO2 simulation, and an enhanced greenhouse warming, or 2 ? CO2 simulation, using the second ...

Abstract: The improvement of analysis and data assimilation techniques can have a large impact, as shown here in the context of the Canadian global and regional data assimilation systems. Both of these systems utilize the same ...

Abstract: A global data assimilation system has been in operation at the Canadian Meteorological Centre (CMC) since March 1991 when it replaced the previous hemispheric system. This paper describes the system and presents an evaluation ...