ERA5 Modes of Interannual Variability

This dataset represents a suite of climate diagnostics for 56 variables relating to the interannual variability of ECMWF ERA5 monthly mean data. Basic fields for each of these variables include a monthly mean climatology and standard deviation, corresponding anomalies spanning 40 or more years of data, empirical orthogonal functions (EOFs), principal component (PC) time series, percent variance explained by each EOF, and an estimate of the standard error of the percent variance explained. Dominant modes of variability include El Nino Southern Oscillation (ENSO) in sea surface temperature, and the Antarctic Oscillation (AO) and North Atlantic Oscillation (NAO) in surface pressure. Separate analyses are performed for the entire globe, northern hemisphere only, and southern hemisphere only. There is sufficient information to further explore lagged correlations, teleconnections, and more advanced statistical techniques. Preparation and calculation of this dataset is performed by CISL DECS at NCAR.

本数据集汇集了与 ECMWF ERA5 月均数据年际变率相关的56个气候诊断变量。每个变量的基本字段包括月均气候场和标准差、对应于40年或更长时间数据的标准偏差异常值、经验正交函数（EOFs）、主成分（PC）时间序列、每个EOF解释的百分比方差，以及百分比方差解释的标准误差估计。主要变率模式包括海面温度中的厄尔尼诺-南方涛动（ENSO）、海平面气压中的南极涛动（AO）和北大西洋涛动（NAO）。分别对全球、北半球和南半球进行了独立分析。数据中包含足够的信息，以进一步研究滞后相关性、遥相关性和更高级的统计技术。该数据集的准备工作及计算由美国国家大气研究中心（NCAR）的 CISL DECS 完成。