MERRA Spatial Downscaling for Hydrology (MSDH)

This resource holds the MERRA Spatial Downscaling for Hydrology (MSDH) downscaling tool developed to provide sub-daily high spatial resolution surfaces of weather variables for distributed hydrologic modeling from NASA Modern Era Retrospective-Analysis for Research and Applications reanalysis products. The tool uses spatial interpolation and physically based relationships between the weather variables and elevation to provide inputs at the scale of a gridded hydrologic model, typically smaller (∼100 m) than the scale of weather reanalysis data (∼20–200 km). Detailed information on and an evaluation of MSDH is given in Sen Gupta, A. and D. G. Tarboton, (2016), \"A tool for downscaling weather data from large-grid reanalysis products to finer spatial scales for distributed hydrological applications,\" Environmental Modelling & Software, 84: 50-69, http://dx.doi.org/10.1016/j.envsoft.2016.06.014.本资源收录了面向水文的MERRA空间降尺度（MERRA Spatial Downscaling for Hydrology, MSDH）工具。该工具旨在基于美国国家航空航天局（NASA）现代研究与应用再分析（Modern Era Retrospective-Analysis for Research and Applications）产品，为分布式水文模拟提供亚日尺度的高空间分辨率气象变量格点场。本工具采用空间插值方法，并结合气象变量与海拔间的物理关联关系，可生成适配网格水文模型的输入数据，其空间尺度通常约为100米，远小于气象再分析数据的20–200公里尺度。 关于MSDH的详细技术细节与性能评估，可参见如下文献：Sen Gupta A, Tarboton D G. 面向分布式水文应用的大网格再分析产品气象数据降尺度工具[J]. 环境建模与软件, 2016, 84: 50-69. http://dx.doi.org/10.1016/j.envsoft.2016.06.014.