针对开展城市小尺度精细化气象观测的应用需求,通过将无人机控制技术、气象观测技术与计算机及通信技术相结合,研制了一套多要素气象观测无人机系统,并开发了相应的数据采集传输模块和地面监控展示软件,实现了基于无人机平台的气温、气压、相对湿度、风速、风向、颗粒物浓度等气象要素的采集与实时传输;经过地面和空中飞行试验数据对比验证,该系统操控灵活、运行良好、稳定可靠,具有良好的应用前景,可广泛应用于城市精细化气象观测、应急救灾、环境监测等领域。
To find out the difference and correlation between atmospheric visibility data from instrumental and visual observation,this article analyzes the visibility data from two kinds of visibility measuring meters and manual observations in Weather Observatory of Guangzhou.The results show that the visibility data from the two methods all have positive correlation.When the visibility is within 3km and 10~30 km,they have high consistency.On five different points of time,the concordance rates between the two methods are more than 90%.The average relative error is lower in 10~30 km and higher than 20% in other ranges.At 11:00,14:00 and 17:00,the average relative error is lower than 10%.In 1~10 km,with the visibility increasing,the average relative error and gross error increase,while the concordance rate reduces.To forecast the visibility more accurately,a parameterization model of visibility is established based on the particle number concentration(N) and relative humidity(RH),which can simulate the change tendency of visibility generally.Actual cases verified that most of the visibility estimation error is less than 3 km.
介绍多源能见度数据监测系统的设计方案.阐述利用C#多线程技术实现对多源能见度数据的采集与入库.基于百度地图JavaScript API的二次应用及AJAX技术的异步加载,实现对能见度仪状态和实时数据的动态监控;采用ASP.NET的MSChart图表插件,以Spline曲线形式实现对不同能见度数据的对比展示.
高性能计算机在气象领域的数值预报、科学研究及大量数据模拟计算等方面发挥重要的作用.以广州市气象局IBM Flex P460高性能计算机集群系统为例,从集群系统建设、硬件系统架构、软件系统架构、气象应用等方面对高性能计算机系统进行阐述,以提高对高性能计算机系统的认识和应用.
介绍了广州市气象部门建立的气象精细化预报产品制作平台、气象服务产品制作平台以及分发平台架构等气象信息服务系统.阐述了针对2014年3月29日--4月3日广州市罕见的暴雨过程,广州市气象信息网络中心借助广州市气象信息服务系统,通过电视、短信、微博、气象网站、PDA手机客户端等多种渠道向政府、公众提供精细化气象服务信息的过程.阐明了应用广州天气官方微博播发信息的理论出发点和实践落脚点.结果表明,广州气象信息服务系统在此次广州2014年首场暴雨天气过程中取得了良好的服务成效.