The global water resources model WaterGAP v2.2e - model output for ISIMIP3b simulation phase with alternative PET method

Assessing global freshwater resources and human water use is of value for a number of needs but challenging. The global water use and water availability model WaterGAP has been in development since 1996 and has served a range of applications such as assessments of global water resources and water stress, also under the impact of climate change, drought hazard quantification, Life Cycle Assessments, water (over)use and consequently depletion of water resources and a better understanding of terrestrial water storage variations (jointly with satellite observations). Here, the reader can download model output for the time period 2015-2100 that was computed by driving WaterGAP v2.2e by in total 8 GCM input datasets (climate forcings) that were generated in the ISIMIP context phase 3b (https://www.isimip.org). The data provided here are created in a run with a specific option that uses an alternative method for calculating potential evapotranspiration to approximate the climate change effect to future evapotranspiration and runoff changes (for details see the model description paper of v2.2e, currently in revision 10.5194/gmd-2023-213).

评估全球淡水资源与人类用水状况，虽具备多重应用价值，但同时颇具挑战。全球用水与水可利用性模型WaterGAP自1996年起投入开发，已被广泛应用于多个场景：包括全球水资源与水压力评估（亦涵盖气候变化影响下的相关分析）、干旱灾害量化评估、生命周期评估、水资源过度开发及由此引发的资源枯竭研究，以及结合卫星观测数据更好地理解陆地水储量变化规律。用户可在此下载2015-2100时段的模型输出结果，该结果通过将总计8套全球气候模型（General Circulation Model, GCM）输入数据集（气候强迫场）驱动WaterGAP v2.2e版本运行生成，这些输入数据集由国际跨部门影响模型互比较计划（Inter-Sectoral Impact Model Intercomparison Project, ISIMIP）第三阶段b期项目生成，详情可访问项目官网https://www.isimip.org。本次提供的数据集基于特定参数设置生成：该设置采用替代方法计算潜在蒸散发，以预估未来蒸散发与径流变化对气候变化的响应（详细说明可参阅WaterGAP v2.2e版本的模型描述论文，当前处于修订阶段，DOI为10.5194/gmd-2023-213）。

搜集汇总

背景与挑战

背景概述

该数据集为全球水资源模型WaterGAP v2.2e的输出数据，用于ISIMIP3b模拟阶段，采用替代的潜在蒸散发计算方法，时间跨度为2015-2100年，空间分辨率为0.5度×0.5度，时间分辨率为月，旨在评估全球淡水资源和人类用水情况，包括气候变化对水资源的影响。