Abstract. The UV Index forecast is under continuous development. Some available products can be f... more Abstract. The UV Index forecast is under continuous development. Some available products can be found at: (http://www.bom.gov.au/weather/national/charts/UV.sht ml. Here a comparison with satellite and surface measurements is illustrated and the national approach adopted for reporting UV Index to the public is presented.
Abelract : Direct reaction (p, n) data to theisobaric analogue of the ground state of 9°Z r is an... more Abelract : Direct reaction (p, n) data to theisobaric analogue of the ground state of 9°Z r is analysed within a DWA using a complex effective two-nueleon transition interaction, the.real part of which has been used in many previous inelastic scattering analyses . Using collective model form factors in the ansatz for the imaginary part of the transition interaction and allowing for virtual resonance excitation, the differential aoss sections from the scattering of 18 .5--45 MeV protons are well reproduced. The parameters of the required complex interaction have a smooth energy variation similar to that required by a microscopic model analysis of proton inelastic scattering to collective states in nuclei .
The UV Index forecast is under continuous development. Some available products can be found at: (... more The UV Index forecast is under continuous development. Some available products can be found at: (http://www.bom.gov.au/weather/national/charts/UV.sht ml . Here a comparison with satellite and surface measurements is illustrated and the national approa ch adopted for reporting UV Index to the public is pre sented.
Understanding the cause ofdifferences among general circulation model projections of carbon dioxi... more Understanding the cause ofdifferences among general circulation model projections of carbon dioxide-induced climatic change is a necessary step toward improving the models. An intercomparison of 14 atmospheric generai circulation models, for which sea surface temperature perturbations were used as a surrogate climate change, showed that there was a roughly threefold variation in global climate sensitivity. Most of this variàtion is attributable to differences in the models' depictions of cloud-climate feedback, a result that emphasizes the need for improvements in the treatment of clouds in these models if they are ultimately to he used as climatic predictors. J. F. B. Mitchell, United Kingdom Meteorological Of fice, Bracknell, Berkshire RG12 25, England.
The Australian Community Climate and Earth-System Simulator (ACCESS) is a coupled climate and ear... more The Australian Community Climate and Earth-System Simulator (ACCESS) is a coupled climate and earth system simulator being developed as a joint initiative of the Bureau of Meteorology and CSIRO in cooperation with the university community in Australia. The main aim of ACCESS is to develop a national approach to climate and weather prediction model development. Planning for ACCESS development commenced in 2005 and significant progress has been made subsequently. ACCESS-based numerical weather prediction (NWP) systems were implemented operationally by the Bureau in September 2009 and were marked by significantly increased forecast skill of close to one day for three-day forecasts over the previously operational systems. The fully-coupled ACCESS earth system model has been assembled and tested, and core runs have been completed and submitted for the Intergovernmental Panel for Climate Change (IPCC) Fifth Assessment Report. Significant progress has been made with ACCESS infrastructure including successful porting to both Solar and Vayu (National Computational Infrastructure (NCI)) machines and development of infrastructure to allow usage by university researchers. This paper provides a description of the NWP component of ACCESS and presents results from detailed verification of the system.
Abstract. The UV Index forecast is under continuous development. Some available products can be f... more Abstract. The UV Index forecast is under continuous development. Some available products can be found at: (http://www.bom.gov.au/weather/national/charts/UV.sht ml. Here a comparison with satellite and surface measurements is illustrated and the national approach adopted for reporting UV Index to the public is presented.
Abelract : Direct reaction (p, n) data to theisobaric analogue of the ground state of 9°Z r is an... more Abelract : Direct reaction (p, n) data to theisobaric analogue of the ground state of 9°Z r is analysed within a DWA using a complex effective two-nueleon transition interaction, the.real part of which has been used in many previous inelastic scattering analyses . Using collective model form factors in the ansatz for the imaginary part of the transition interaction and allowing for virtual resonance excitation, the differential aoss sections from the scattering of 18 .5--45 MeV protons are well reproduced. The parameters of the required complex interaction have a smooth energy variation similar to that required by a microscopic model analysis of proton inelastic scattering to collective states in nuclei .
The UV Index forecast is under continuous development. Some available products can be found at: (... more The UV Index forecast is under continuous development. Some available products can be found at: (http://www.bom.gov.au/weather/national/charts/UV.sht ml . Here a comparison with satellite and surface measurements is illustrated and the national approa ch adopted for reporting UV Index to the public is pre sented.
Understanding the cause ofdifferences among general circulation model projections of carbon dioxi... more Understanding the cause ofdifferences among general circulation model projections of carbon dioxide-induced climatic change is a necessary step toward improving the models. An intercomparison of 14 atmospheric generai circulation models, for which sea surface temperature perturbations were used as a surrogate climate change, showed that there was a roughly threefold variation in global climate sensitivity. Most of this variàtion is attributable to differences in the models' depictions of cloud-climate feedback, a result that emphasizes the need for improvements in the treatment of clouds in these models if they are ultimately to he used as climatic predictors. J. F. B. Mitchell, United Kingdom Meteorological Of fice, Bracknell, Berkshire RG12 25, England.
The Australian Community Climate and Earth-System Simulator (ACCESS) is a coupled climate and ear... more The Australian Community Climate and Earth-System Simulator (ACCESS) is a coupled climate and earth system simulator being developed as a joint initiative of the Bureau of Meteorology and CSIRO in cooperation with the university community in Australia. The main aim of ACCESS is to develop a national approach to climate and weather prediction model development. Planning for ACCESS development commenced in 2005 and significant progress has been made subsequently. ACCESS-based numerical weather prediction (NWP) systems were implemented operationally by the Bureau in September 2009 and were marked by significantly increased forecast skill of close to one day for three-day forecasts over the previously operational systems. The fully-coupled ACCESS earth system model has been assembled and tested, and core runs have been completed and submitted for the Intergovernmental Panel for Climate Change (IPCC) Fifth Assessment Report. Significant progress has been made with ACCESS infrastructure including successful porting to both Solar and Vayu (National Computational Infrastructure (NCI)) machines and development of infrastructure to allow usage by university researchers. This paper provides a description of the NWP component of ACCESS and presents results from detailed verification of the system.
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Papers by L. Rikus