Global Atmospheric Circulation Statistics, 1958-1989

Twenty-two monthly statistical quantities make up this dataset of grids which describes the atmospheric general circulation at eleven vertical levels across the troposphere and stratosphere over a 32-year period. These gridded analyses, created from upper air soundings across the globe, span the period from May 1958 to December 1989. The statistical parameters, which are useful for comparing climate model simulations to actual observations, include monthly means and variances of horizontal and vertical wind, temperature, geopotential height, moisture, and horizontal wind divergence. There are also covariance terms describing the relationship between wind, temperature, moisture, and geopotential height. In general, the analyses near the surface of the earth (900mb and below) tend to be less reliable than those of the higher levels because the individual rawinsonde reports are often incomplete due to missing 1000mb reports.

本数据集由二十二个月度统计量构成，描绘了在热带大气层和对流层中，自对流层顶至平流层底共十一垂直层上，32年期间的天气环流状况。这些网格化分析基于全球高空测风报告，时间跨度涵盖1958年5月至1989年12月。统计参数包括水平及垂直风速、温度、位势高度、湿度以及水平风速散度的月平均值与方差，对于将气候模型模拟与实际观测进行对比具有重要意义。此外，还包含描述风速、温度、湿度和位势高度之间关系的协方差项。通常而言，靠近地球表面（900毫巴以下）的分析数据相较高层分析数据可靠性较低，这是因为单个无线电探空报告往往因缺少1000毫巴报告而存在不完整性。