NCEP 51-year Hydrological Reanalysis

A 51-year hydrological reanalysis between 1948 and 1998 over the continental US was recently completed at Climate Prediction Center of NCEP, NOAA. The project used Noah land surface model (LSM) with forcing data regridded from NCEP/NCAR Reanalysis data and the new CPC daily and hourly precipitation data. The best available orography, soil and vegetation types, etc. are used as the boundary conditions of this study. The output fields include all components of energy, water mass balance, snow cover and depth, and 4 layers of soil temperature, moisture (both liquid and frozen) below the ground. Three types of data files are archived in this dataset. They include the restart files, the forcing fields to run the Noah Land Surface Model, and the output files from the 1948-1998 runs. The daily restarting files and the hourly forcing fields are stored on NCAR's High Performance Storage System (HPSS) only. You can find the Noah LSM used in this study here [ftp://ftp.emc.ncep.noaa.gov/mmb/gcp/ldas/noahlsm/ver_2.5.2].近期，美国国家海洋和大气管理局（NOAA）国家气候预测中心（NCEP）完成了对1948年至1998年间美国大陆的51年水文再分析工作。该项目采用了Noah陆地表面模型（LSM），并结合了来自NCEP/NCAR再分析数据的强迫数据重网格化以及中国气象局气候预测中心（CPC）提供的每日及小时级降水数据。本研究采用了当时可获得的最佳地形、土壤和植被类型等边界条件。输出字段包括能量、质量平衡、积雪覆盖和深度以及地下土壤温度、水分（液态和固态）的4层数据。该数据集存档了三种类型的数据文件，包括重启文件、用于运行Noah陆地表面模型的强迫场以及1948-1998年运行产生的输出文件。每日重启文件和小时级强迫场仅存储在NCAR的高性能存储系统（HPSS）上。您可以在以下链接找到本研究中使用的Noah LSM：[ftp://ftp.emc.ncep.noaa.gov/mmb/gcp/ldas/noahlsm/ver_2.5.2]。