Global Earthquake Total Economic Loss Risk Deciles

The Global Earthquake Total Economic Loss Risk Deciles is a 2.5 minute grid of global earthquake total economic loss risks. A process of spatially allocating Gross Domestic Product (GDP) based upon the Sachs et al. (2003) methodology is utilized. First the proportional contributions of subnational units to their respective national GDP are determined using sources of various origin. The contribution rates are then applied to published World Bank Development Indicators to determine a GDP value for the subnational unit. Once the national GDP has been spatially stratified into the smallest administrative units available, GDP values for grid cells are derived using Gridded Population of the World, Version 3 (GPWv3) data population distributions. A per capita contribution value is determined within each subnational unit, and then this value is multiplied by the population per grid cell. Once a GDP value has been determined on a per grid cell basis, then the regionally variable loss rate as derived from the historical records of EM-DAT is used to determine the total economic loss risks posed to a grid cell by earthquake hazards. The final surface does not present absolute values of total economic loss, but rather a relative decile (1-10 with increasing risk) ranking of grid cells based upon the calculated economic loss risks. 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). To provide a spatial surface of the total economic impacts of global earthquake hazard.全球地震总经济损失风险十分位数数据集为一套分辨率2.5弧分的全球地震总经济损失风险格网数据。本数据集采用基于Sachs等（2003）研究方法的空间分配流程，对国内生产总值（Gross Domestic Product, GDP）进行空间化处理：首先通过多源数据源确定各次级行政单元对所属国家GDP的贡献占比；随后将该占比应用于公开的世界银行发展指标，以此核算各次级行政单元的GDP数值。待国家GDP被空间分解至现有最小行政单元后，借助世界栅格人口数据集第3版（Gridded Population of the World, Version 3, GPWv3）的人口分布数据，推导各栅格单元的GDP值。继而在每个次级行政单元内计算人均贡献值，并将该值与各栅格单元的人口数相乘，得到单栅格GDP值。在获取单栅格GDP值后，结合从EM-DAT历史地震记录中提取的区域差异化损失率，计算每个栅格单元所面临的地震灾害总经济损失风险。本最终成果未展示绝对经济损失数值，而是基于计算得到的经济损失风险，对所有栅格单元进行相对十分位分级（1至10，风险随数值升高而递增）排序。本数据集由哥伦比亚大学灾害与风险研究中心（Center for Hazards and Risk Research, 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（Center for International Earth Science Information Network, CIESIN）联合研制完成。本数据集旨在构建全球地震灾害总经济影响的空间分布表面。