Drought Code - ERA-Interim

The Drought Code (DC) is a numeric rating of the average moisture content of deep, compact organic layers. This code is a useful indicator of seasonal drought effects on forest fuels and the amount of smoldering in deep duff layers and large logs. 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). 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. 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] Temporal resolution: 1 day Spatial resolution: 0.7 degrees (~80 Km) Spatial coverage: Global Time span: from 1980-01-01 to 2018-06-30干旱码（Drought Code, DC）是对深层紧实有机层平均含水率的数值评级。该指标可有效表征季节性干旱对森林可燃物的影响，以及深层枯落物层与大直径原木的阴燃程度。 本数据集是加拿大火险天气指数系统（Canadian Fire Weather Index System）的网格化实地计算结果的一部分，其气象强迫数据来自欧洲中期天气预报中心（European Centre for Medium-range Weather Forecast, ECMWF）的ERA-Interim再分析数据集（Vitolo等，2019）。本数据集由联合研究中心（Joint Research Centre）与欧洲中期天气预报中心在全球野火信息系统（Global Wildfires Information System, GWIS）框架下合作开发，该系统是地球观测组织（GEO）与哥白尼工作计划的联合倡议项目。 整套数据集共包含7个火险指数，各指数分别表征可燃物含水率与风速对火灾起火概率及起火后火势行为的不同影响维度，具体为：细可燃物含水率码（Fine Fuel Moisture Code, FFMC）、枯落物含水率码（Duff Moisture Code, DMC）、干旱码（Drought Code, DC）、初始蔓延指数（Initial Spread Index, ISI）、蓄积指数（Build Up Index, BUI）、火险天气指数（Fire Weather Index, FWI）以及日严重度评级（Daily Severity Rating, DSR）。为便于使用，各指数均单独归档存储。 该数据集可通过caliver R包进行处理（Vitolo等，2017、2018）。 详细信息： 文件格式：netCDF4 坐标系统：世界大地测量系统1984（又称WGS 1984，EPSG:4326） 经度范围：[-180, +180] 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6月30日