Global Multihazard Total Economic Loss Risk Deciles

The Global Multihazard Total Economic Loss Risk Deciles is a 2.5 minute grid of global multihazard total economic loss risks. First, for each of the considered hazards (cyclones, droughts, earthquakes, floods, landslides, and volcanoes), subnational distributions of Gross Domestic Product (GDP) are computed using a methodology developed from Sachs et al. (2003). Where applicable, the contributions of subnational Units to national GDP estimates, the contribution ratio, are determined using data of varied origin. World Bank Development Indicators are substituted for GDP estimates of varied origin and the subnational GDP is estimated using the fore mentioned contribution ratios. A subnational, per capita GDP is derived and a final GDP estimate per grid cell is made based on grid cell population density. A raw, total economic loss is computed per grid cell using a regional economic loss rate derived from EM-DAT records. To more accurately reflect the confidence surrounding the economic loss estimate, the range of losses are classified into deciles, 10 classes of an approximately equal number of grid cells. A multihazard index is generated by summing the top three deciles of the individual hazards. This data set is the result of collaboration among the Columbia University Center for Hazards and Risk Research (CHRR), International Bank for Reconstruction and Development/The World Bank, and Columbia University Center for International Earth Science Information Network (CIESIN).

全球多灾害总经济损失风险十等分数据集，以2.5分钟格网形式呈现全球多灾害总经济损失风险。首先，针对所考虑的灾害（如台风、干旱、地震、洪水、山体滑坡和火山爆发等），采用Sachs等（2003年）开发的方法计算各灾害的国内生产总值（GDP）的次国家分布。在适用的情况下，通过不同来源的数据确定次国家单位对国家GDP估计的贡献及其贡献比率。以世界银行发展指标替代不同来源的GDP估计值，并利用上述贡献比率估算次国家GDP。进一步推导出人均次国家GDP，并基于格网人口密度对每个格网的GDP进行最终估计。利用从EM-DAT记录中推导出的区域经济损失率，针对每个格网计算原始的总经济损失。为更精确地反映经济损失估计的不确定性，将损失范围划分为十等分，即约等数量的格网分为10个类别。通过将单个灾害的前三个十等分相加，生成多灾害指数。该数据集是哥伦比亚大学灾害与风险研究中心（CHRR）、国际复兴开发银行/世界银行以及哥伦比亚大学国际地球科学信息网络中心（CIESIN）之间合作的结果。