NOAA CIRES Twentieth Century Global Reanalysis Version 2

The Twentieth Century Reanalysis Project, supported by the Earth System Research Laboratory Physical Sciences Division from NOAA and the University of Colorado CIRES Climate Diagnostics Center, is an effort to produce a global reanalysis dataset spanning a portion of the nineteenth century and the entire twentieth century (1871 - near present), assimilating only surface observations of synoptic pressure, monthly sea surface temperature and sea ice distribution. Products include 6-hourly ensemble mean and spread analysis fields on a 2 by 2 degree global latitude-longitude grid, and 3 and 6-hourly ensemble mean and spread forecast (first guess) fields on a global Gaussian T62 grid. Fields are accessible in yearly time series (1 file per parameter) and monthly synoptic time (all parameters per synoptic hour) files. Ensemble grids, spectral coefficients, and other information will available by offline request in the future.

The Twentieth Century Reanalysis Project used resources of the National Energy Research Scientific Computing Center managed by Lawrence Berkeley National Laboratory and of the Oak Ridge Leadership Computing Facility at Oak Ridge National Laboratory, which are supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 and Contract No. DE-AC05-00OR22725, respectively.

Note: Version 2c of this reanalysis (running from 1851 - 2011) is the recommended research version. Please see ds131.2 to access Version 2c.

二十世纪再分析项目，由美国国家海洋和大气管理局（NOAA）地球系统研究实验室物理科学部以及科罗拉多大学CIRES气候诊断中心联合支持，旨在构建一个涵盖十九世纪部分时期及整个二十世纪（1871年至近现代）的全球再分析数据集。该数据集仅整合了地面观测的天气分析气压、月度海表温度和海冰分布数据。产品包括以2×2度全球经纬度网格为基础的6小时集合平均和分散分析场，以及在全球高斯T62网格上的3小时和6小时集合平均和分散预报（首次猜测）场。数据场可通过年度时间序列（每个参数一个文件）和月度天气分析时间序列（每个天气小时所有参数）文件访问。集合网格、谱系数及其他信息将在未来通过离线请求提供。
二十世纪再分析项目利用了由劳伦斯伯克利国家实验室管理的国家能源研究科学计算中心以及橡树岭国家实验室的橡树岭领导计算设施的资源，这些资源分别由美国能源部科学办公室根据合同号DE-AC02-05CH11231和合同号DE-AC05-00OR22725提供支持。
备注：本再分析的第二版c（运行于1851年至2011年）是推荐的研究版本。请参阅ds131.2以访问第二版c。