dphase_aladfr: ALADIN-France operational model forecasts run by Meteo-France for the MAP D-PHASE project

Project: D-PHASE, Demonstration of Probabilistic Hydrological and Atmospheric Simulation of flood Events in the Alpine region - The Mesoscale Alpine Programme (MAP, the first WWRP Research and Development Project (RDP)) is an international research initiative devoted to the study of atmospheric and hydrological processes over mountainous terrain. It aims towards expanding our knowledge of weather and climate over complex topography, and thereby to improve current forecasting capabilities. A large-scale field phase in the Alpine region took place from 7 September to 15 November 1999. D-PHASE (Demonstration of Probabilistic Hydrological and Atmospheric Simulation of flood Events in the Alpine region) is a WWRP Forecast Demonstration Project (FDP) and aims at demonstrating some of the many achievements of MAP, in particular the ability of forecasting heavy precipitation and related flooding events in the Alpine region. The MAP FDP will address the entire forecasting chain ranging from limited-area ensemble forecasting, high-resolution atmospheric modelling(km-scale), hydrological modelling, and nowcasting to decision making by the end users, i.e., it is foreseen to set up an end-to-end forecasting system. The demonstration period of MAP D-PHASE will be 1 June to 30 November 2007. See also official homepage: http://www.map.meteoswiss.ch/map-doc/dphase/dphase_info.htm Please be aware of the common COPS/GOP/D-PHASE data policy, which you please find at http://cops.wdc-climate.de/ Summary: ALADIN is the operational model at Meteo-France. The horizontal resolution is 9.5km, the time step : 415s with a Semi-lagrangian scheme. There are 46 vertical levels with 15 levels below 3000m. The domain of the integration is : (-11.84W, 33.14E) (25N,56.95N) Physical parameterization: - the micro-physics scheme use 4 prognostic variables: liquid and ice cloud water, rain and snow. - the convection scheme is based on Bougeault (1985) with a donwdraft parameterization. - the operational ECMWF radiation code which is called every 60 minutes. - the burbulence is based on Louis's function with an interactive mixing length. ALADIN is coupled with ARPEGE every 3 hours and has its own assimilation system based on 3DVAR. The post-processing in GRIB files is done on a regular LAT-LON Grid with a 0.1 deg resolution on the DPHASE domain. ALADIN-FRANCE daily performs 54h forecasts starting at 0TU, 6TU, 12TU, 18TU (only the 0UTC forecast until 30h is sent) Grid description: DDOM: xfirst: 2.0 yfirst: 43.0 xsize: 161.0 ysize: 71.0 xinc: 0.1 yinc: 0.1 xnpole: 0.0 ynpole: 0.0

项目：D-PHASE（阿尔卑斯山区洪水事件概率水文与大气模拟演示项目，Demonstration of Probabilistic Hydrological and Atmospheric Simulation of flood Events in the Alpine region）。中尺度阿尔卑斯计划（Mesoscale Alpine Programme, MAP，世界天气研究计划（World Weather Research Programme, WWRP）首个研究与发展项目（Research and Development Project, RDP））是一项致力于山地地形大气与水文过程研究的国际科研计划，旨在深化对复杂地形区天气与气候的认知，进而提升现有预报能力。1999年9月7日至11月15日，阿尔卑斯山区开展了大规模野外观测阶段工作。
D-PHASE是世界天气研究计划（WWRP）预报演示项目（Forecast Demonstration Project, FDP），旨在展示MAP的多项研究成果，尤其是阿尔卑斯山区强降水及相关洪涝事件的预报能力。MAP预报演示项目将覆盖完整预报链条，从有限区域集合预报、公里级高分辨率大气模式、水文模拟、临近预报直至终端用户决策，即计划构建一套端到端的预报系统。MAP D-PHASE的演示周期为2007年6月1日至11月30日。官方主页详见：http://www.map.meteoswiss.ch/map-doc/dphase/dphase_info.htm。请遵循通用的COPS/GOP/D-PHASE数据政策，详情参见：http://cops.wdc-climate.de。
摘要：ALADIN是法国气象局（Meteo-France）的业务数值预报模式。其水平分辨率为9.5km，时间步长为415s，采用半拉格朗日（Semi-lagrangian）方案。垂直方向共设置46层，其中3000m高度以下设有15层。积分区域为：西经11.84°至东经33.14°，北纬25°至北纬56.95°。
物理参数化方案：
1. 微物理方案采用4个预报变量：液态云水量、固态云水量、降雨量及降雪量；
2. 对流方案基于Bougeault（1985）提出的框架，包含下沉气流参数化模块；
3. 采用业务化欧洲中期天气预报中心（European Centre for Medium-Range Weather Forecasts, ECMWF）辐射代码，每60分钟调用一次；
4. 湍流方案基于Louis函数，采用交互式混合长度参数化方式。
ALADIN每3小时与ARPEGE完成一次数据耦合，其自身的数据同化系统基于三维变分（3DVAR）方法。后处理以GRIB格式文件输出，在D-PHASE区域内采用0.1°分辨率的规则经纬网格。法国气象局的ALADIN系统每日从0UTC、6UTC、12UTC、18UTC四个起报时次开展54小时预报（仅0UTC起报的预报前30小时数据会被提交）。
网格描述：DDOM：xfirst=2.0，yfirst=43.0，xsize=161.0，ysize=71.0，xinc=0.1，yinc=0.1，xnpole=0.0，ynpole=0.0