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A VARIATIONAL TECHNIQUE FOR DOWNSCALING METEOROLOGICAL FIELDS.
| 题名： | A VARIATIONAL TECHNIQUE FOR DOWNSCALING METEOROLOGICAL FIELDS. |
| 作者： | Steinacker-R |
| 关键词： | Empirical-methods; Meteorological-instruments; Radar-detectors; Road-weather-information-systems; Satellite-communication; Slipperiness-; Statistical-analysis; Surface-course-Pavements; Topography-; Weather-forecasting |
| 摘要： | Most in situ meteorological observing systems are designed to resolve and detect the synoptic scales of atmospheric fields. For many purposes, however, the knowledge of the subsynoptic scales is necessary, like for road weather diagnosis and nowcasting. There are basically two ways of overcoming this problem. The installation of dense arrays of road weather stations may resolve the menoscale fields along road segments. This is done in many countries but it is an expensive measure and still does not resolve some of the important microscale structures such as road surface temperature or road slipperiness. The other way is to apply intelligent downscaling techniques. This means an application of spatial or temporal interpolation techniques which resolve the scales of interest by adding a priori knowledge about the subscale patterns. Some of the methods of dealing with this problem include empirical statistical or physical methods. Such methods already exist, e.g. for downscaling precipitation fields by incorporating radar or satellite information or by applying topoclimatological models to resolve small scale surface temperature or circulation patterns. |
| 总页数： | Conference Title: 11th International Road Weather Conference (http://www.sirwec.org. Location: Sapporo, Japan. Sponsored by: Standing International Road Weather Commission. Held: 20020126-20020128. 2002/01. pp8 |
| 报告类型： | 科技报告 |
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