National Centers for Environmental Prediction/ National Center for Atmospheric Research Reanalysis (NCEP-NCAR 1) - Tropopause Level

The NCEP-NCAR Re-analysis project is a collection of global analyses of atmospheric fields in support of atmospheric and climate research. The Reanalysis involves the recovery of land surface,ship, rawinsonde, pibal, aircraft, satellite and other data, quality controlling and assimilating these data with a data assimilation system. The data is available in its original 4 times daily format and as daily averages and cover a period from 1948 to present. These are the Tropopause Level data.

NCEP-NCAR再分析（NCEP-NCAR Re-analysis）项目是一套全球大气场分析数据集，旨在为大气科学与气候研究提供支撑。本次再分析工作涵盖回溯获取陆面、船舶、无线电探空仪（rawinsonde）、高空测风气球（pibal）、航空器、卫星及其他各类观测数据，并通过数据同化系统对上述数据开展质量控制与同化处理。该数据提供原始每日4次采样格式与日平均统计格式两种版本，时间跨度为1948年至今。本次提供的为对流层顶（Tropopause）层级数据。