Initial Spread Index - ERA-Interim

The Initial Spread Index (ISI) is a numeric rating of the expected rate of fire spread. It combines the effects of wind and the FFMC on rate of spread without the influence of variable quantities of fuel. 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初始蔓延指数（Initial Spread Index，ISI）是用于表征野火预期蔓延速率的数值评级指标。该指标整合了风速与细燃料湿度码（Fine Fuel Moisture Code，FFMC）对野火蔓延速率的影响，且不受可变燃料载量的干扰。本数据集为更大规模数据集的组成部分，该数据集基于欧洲中期天气预报中心（European Centre for Medium-range Weather Forecasts，ECMWF）的ERA-Interim再分析数据集提供的气象强迫数据，通过加拿大火险天气指数系统（Canadian Fire Weather Index System）生成网格化火险计算结果（Vitolo等，2019；Di Giuseppe等，2016）。本数据集由欧盟联合研究中心（Joint Research Centre，JRC）与ECMWF合作开发，依托全球野火信息系统（Global Wildfires Information System，GWIS）框架开展，该系统是地球观测组织（Group on Earth Observations，GEO）与哥白尼工作方案的联合倡议。整套数据集共包含7个指数，各自从不同维度阐释燃料湿度与风速对野火起火概率及起火后燃烧行为的影响。各指数分别为：细燃料湿度码（FFMC）、腐殖质湿度码（DMC）、干旱码（DC）、初始蔓延指数（ISI）、蓄积指数（BUI）、火险天气指数（FWI）以及每日严重度评级（DSR）。为便于使用，各指数均单独归档存储。数据集通过开源软件GEFF v3.0（https://git.ecmwf.int/projects/CEMSF/repos/geff）生成，该软件现已采用欧盟联合研究中心（JRC）提供的配置与参数，详细信息可访问https://git.ecmwf.int/projects/CEMSF/repos/geff/browse/NEWS.md。用户可通过caliver R包（Vitolo等，2017、2018）对本数据集进行处理与分析。 详情如下： 文件格式：netCDF4 坐标系：世界大地测量系统1984（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：1980-01-01至2018-12-31