Fire Weather Index - ERA-Interim

The Fire Weather Index (FWI) is a numeric rating of fire intensity, dependent on weather conditions. This is a good indicator of fire danger because it contains both a component of fuel availability (drought conditions) and a measure of ease of spread. This is part of a larger dataset providing gridded field calculations from the Canadian Fire Weather Index System using weather forcings from the European Centre for Medium-range Weather Forecast (ECMWF) ERA-Interim reanalysis dataset (Vitolo et al., 2019; Di Giuseppe et al., 2016). The dataset has been developed through a collaboration between the Joint Research Centre and ECMWF under the umbrella of the Global Wildfires Information System (GWIS), a joint initiative of the GEO and the Copernicus Work Programs. The whole dataset consists of seven indices, each of which describes a different aspect of the effect that fuel moisture and wind have on fire ignition probability and its behavior, if started. The indices are called: Fine Fuel Moisture Code (FFMC), Duff Moisture Code (DMC), Drought Code (DC), Initial Spread Index (ISI), Build Up Index (BUI), Fire Weather Index (FWI) and Daily Severity Rating (DSR). For convenience, each index is archived separately. Data are generated using the open source software GEFF v3.0 (https://git.ecmwf.int/projects/CEMSF/repos/geff), which now uses settings and parameters provided by the JRC (more info here https://git.ecmwf.int/projects/CEMSF/repos/geff/browse/NEWS.md). This dataset can be manipulated using the caliver R package (Vitolo et al. 2017, 2018). Details: File format: netcdf4 Coordinate system: World Geodetic System 1984 (also known as WGS 1984, EPSG:4326). Longitude range: [-180, +180] Latitude range: [-90, +90] Temporal resolution: 1 day Spatial resolution: 0.7 degrees (~80 Km) Spatial coverage: Global Time span: from 1980-01-01 to 2018-12-31火灾天气指数（Fire Weather Index，FWI）是一种基于气象条件计算得到的火灾强度数值评级指标。该指标可有效表征火灾危险性，因其同时涵盖了可燃物可获得性（即干旱状况）相关分量，以及火势蔓延难易程度的量化度量。本数据集属于一套更大尺度的数据集集群，该集群通过加拿大火灾天气指数系统生成格点化场域计算结果，其气象强迫场数据源自欧洲中期天气预报中心（European Centre for Medium-range Weather Forecasts，ECMWF）的ERA-Interim再分析数据集（Vitolo等，2019；Di Giuseppe等，2016）。本数据集由联合研究中心（Joint Research Centre，JRC）与欧洲中期天气预报中心（ECMWF）合作开发，隶属于全球野火信息系统（Global Wildfires Information System，GWIS）——该系统是地球观测组织（Group on Earth Observations，GEO）与哥白尼工作计划（Copernicus Work Programs）联合发起的倡议项目。整套数据集共包含7项指数，每一项指数均针对可燃物湿度与风速对火灾引燃概率及起火后火势行为的影响，分别刻画不同维度的特征。各指数分别为：细可燃物湿度编码（Fine Fuel Moisture Code，FFMC）、腐殖质层湿度编码（Duff Moisture Code，DMC）、干旱编码（Drought Code，DC）、初始蔓延指数（Initial Spread Index，ISI）、蓄积指数（Build Up Index，BUI）、火灾天气指数（Fire Weather Index，FWI）以及每日火灾严重度评级（Daily Severity Rating，DSR）。为便于使用，各项指数均单独归档存储。本数据集通过开源软件GEFF v3.0生成（开源仓库地址：https://git.ecmwf.int/projects/CEMSF/repos/geff），该软件目前采用联合研究中心（JRC）提供的配置与参数，详细信息可参考：https://git.ecmwf.int/projects/CEMSF/repos/geff/browse/NEWS.md。用户可通过caliver R语言工具包对本数据集进行处理与分析（Vitolo等，2017、2018）。详细参数如下：文件格式：netCDF4；坐标系：1984世界大地测量系统（World Geodetic System 1984，又称WGS 1984，EPSG:4326）；经度范围：[-180, +180]；纬度范围：[-90, +90]；时间分辨率：1日；空间分辨率：0.7度（约80千米）；空间覆盖范围：全球；时间跨度：1980年1月1日至2018年12月31日。