Drought Intensity (Global - Annual - 1 km) - FAO ASIS

Complementary to Agricultural Stress Index (ASI) which detects the severe and extreme drought, Drought Intensity is another quick-look indicator in ASIS that facilitates the early understanding of the intensity of the drought. It is an indicator introduced in 2018. Agricultural droughts are classified by their intensity and are categorized into four classes: Extreme, Severe, Moderate or Mild. The intensity of drought in ASIS is calculated through the weighted Mean Vegetation Health Index, indicating that the poorer the vegetation health the more severe the drought. Phenomenon Mapped: Drought Intensity Units: non Time Interval: 1-year Time Extent: 1984-Present Cell Size: 1 km Pixel Type: 32-bit Signed Integer Data Projection: WGS 1984 Mosaic Projection: WGS 1984 Web Mercator Source: Food and Agriculture Organization of the United Nations Update Cycle: Annual, 5th of July for the previous crop year The Annual summary of Drought Intensity is processed at the end of crop season. It allows the user to assess the overall intensity of drought for an entire growing season. It differs from Drought Intensity dekadal product, which is based on conditions from the start of the season up to the current dekad. Important note: Map legend value= Pixel physical value * multiplier (100), except 251: off season, 252: no data, 253: no season and 254: no crop land, 255: water. Explore this and related data in this web application. More information please visit FAO GIEWS Earth Observation website本数据集作为用于检测严重与极端干旱的农业胁迫指数（Agricultural Stress Index, ASI）的补充内容，是2018年推出的农业干旱监测系统（ASIS）中的一款快速概览型指标，旨在辅助用户及早掌握干旱的严重程度。 农业干旱依据其严重程度被划分为四个等级：极端、严重、中度与轻度干旱。 ASIS中的干旱强度通过加权平均植被健康指数（Weighted Mean Vegetation Health Index）计算得出，其原理为植被健康状况越差，干旱程度越严重。 映射现象：干旱强度（Drought Intensity） 单位：无 时间间隔：1年 时间范围：1984年至今 像元分辨率：1 km 像素类型：32位有符号整数 数据投影：WGS 1984坐标系 镶嵌投影：WGS 1984 Web墨卡托投影 数据来源：联合国粮食及农业组织（Food and Agriculture Organization of the United Nations, FAO） 更新周期：每年7月5日，对上一作物年度的数据进行更新 年度干旱强度汇总数据于作物季末完成处理，可帮助用户评估整个生长季的整体干旱严重程度。本数据集与十日尺度干旱强度产品存在差异，后者基于作物季起始至当前十日周期的干旱状况计算得出。 重要提示：地图图例数值 = 像素实际值 × 缩放系数（100），其中特殊值含义如下：251代表非作物季，252代表无有效数据，253代表无种植季，254代表非耕地，255代表水体。 您可通过本网页应用探索本数据集及相关数据，更多信息请访问FAO GIEWS地球观测官网。