|Item type||Location||Call number||Copy||Status||Date due|
|REPORT||Mesa Lab||102101 (Browse shelf)||1||Available|
"Appendix to WMO technical progress report on the global data-processing and forecasting system (GDPFS) and numerical weather prediction (NWP) research."
Preface by TAKEUCHI Yoshiaki, Director, Numerical Prediction Division, Japan Meteorological Agency:
The Japan Meteorological Agency (JMA) started the operation of numerical weather prediction (NWP) in June 1959 after several years of extensive research activities of the Numerical Weather Prediction Group of Japan. That was the third NWP operation in the world, following the Swedish Meteorological and Hydrological Institute (SMHI) in September 1954 and the US Weather Bureau in May 1955. The development of NWP since then has been tremendous. Operational NWP centers, including JMA, have benefited from ever better understanding of meteorological phenomena, improved modeling techniques, increasing computing power, efficient telecommunication systems, and improved observing systems, especially meteorological and earth-observing satellite systems.
This report is published to present technical details of the operational NWP systems of JMA as of February 2013, as an appendix to "WMO Technical Progress Report on the Global Data-processing and Forecasting System (GDPFS) and Numerical Weather Prediction (NWP) Research".
The first chapter provides an overview of the configurations and specifications of the current computer system at JMA. Thereafter follows a description of the operational suite and the operational job management system on the current computer system. The second chapter deals with three major data assimilation systems for atmospheric fields, namely, Global Analysis, Meso-scale Analysis and Local Analysis including the observation data used in these analyses. A description on the JMA Climate Data Assimilation System as well as more aspects on data assimilation is given in this chapter.
The third chapter describes a suite of NWP models for very short-range prediction of meso-scale disturbances, and for short- and medium-range prediction of synoptic-scale disturbances. The global model is used in ensemble prediction systems for the typhoon forecast, one-week and one-month prediction, and the coupled ocean-atmosphere model is employed for the seasonal forecast and El Nino forecast. An atmospheric transport models are applied to the prediction of transport of trace elements such as radioactive materials and Kosa (Aeolian Dust) for environmental information. The fourth chapter describes various kinds of application products of NWP such as weather charts, grid point values (GPV) products, very-short-range forecasting of precipitation, hourly analysis in wind and temperature, guidance for short-range forecasting, products for aviation services, products of ensemble prediction systems and atmospheric angular momentum functions. The last chapter is on sea state models, specifically ocean wave models, storm surge models, a sea ice model and an oil spill prediction model as well as sea surface temperature analysis systems and ocean data assimilation systems.
JMA is working forward a further strengthening of models (e.g., expanding the operation frequency of the Local Forecast Model (LFM) to hourly and its area to Japan and the surrounding area and raising the top level of the Global Spectral Model to include the whole stratosphere). The reader will find updated information on the NWP systems of JMA on the website of JMA