Drought impact area on ecosystems

<p>This indicator shows the area impacted by drought in [km2] and [% of the total area of the country]. It monitors negative anomalies in vegetation productivity in areas with a severe soil moisture deficit during the growing season (more than one standard deviation from the long term average - observed through remote sensing data at 500×500 metres resolution of the Copernicus EMS European Drought Observatory of the European Commission Joint Research Centre). The indicator covers only agricultural droughts with soil moisture deficits causing reduced vegetation productivity due to insufficient precipitation, as opposed to hydrological droughts, which occur when low water supplies become apparent in streams, reservoirs, and groundwater levels, usually after many months of meteorological drought.</p>本指标展示了受干旱影响的面积（单位：平方千米）及占该国总面积的百分比。本指标监测生长季内土壤水分严重亏缺区域的植被生产力负异常，该异常值较长期平均值偏离超过一个标准差，数据由欧盟委员会联合研究中心哥白尼EMS（Copernicus EMS）欧洲干旱观测站以500×500米分辨率的遥感数据观测得到。本指标仅涵盖因降水不足导致土壤水分亏缺、进而引发植被生产力下降的农业干旱，而非水文干旱——水文干旱指溪流、水库及地下水位出现低水位现象，通常发生在气象干旱持续数月之后。