1950-2017全球范围美国NCEP/NCAR数据同化系统（CDAS）输出的大气再分析数据

NCEP/NCAR再分析数据工程（1.0）是 NCEP–NCAR 利用美国国家先进的分析/预测系统去对过去的资料（1949-最近）进行数据同化处理得到的。这些数据大部分都是来自PSD（物理科学部：Physical Sciences Division）原始日平均的数据。对于等压面上的资料，一般垂直分辨率会有17层，从1000hPa到10hPa。水平分辨率一般为2.5°×2.5°。NCEP再分析资料是国际上比较系统的大气科学再分析数据集，与欧洲中心的再分析资料相比，其覆盖的起始年份要早一些，最新的资料更新也更快一些。

The NCEP/NCAR Reanalysis Dataset (Version 1.0) was developed by NCEP–NCAR through data assimilation of historical observational data (from 1949 to the present) using the U.S. National Advanced Analysis/Forecast System. Most of these datasets originate from the raw daily-averaged data provided by the Physical Sciences Division (PSD). For data on isobaric surfaces, the vertical resolution typically consists of 17 levels, ranging from 1000 hPa to 10 hPa. The horizontal resolution is generally 2.5° × 2.5°. The NCEP reanalysis dataset is a relatively systematic atmospheric science reanalysis dataset internationally. Compared with the reanalysis datasets from the European Centre for Medium-Range Weather Forecasts (ECMWF), it has an earlier starting year for data coverage and updates its latest data more rapidly.

搜集汇总

背景与挑战

背景概述

该数据集是1950-2017年全球范围的美国NCEP/NCAR大气再分析数据，基于数据同化系统生成，具有日时间分辨率和2.5⁰的空间分辨率，覆盖全球大气层垂直17个等压面。其特点是起始时间早、更新快，采用NetCDF格式存储，适用于气候研究和气象分析。