Climate Model Products from Germany's Deutches Klimarechenzentrum

This dataset contains climate model output from Deutches Klimarechenzentrum (DKRZ) in Germany. The model output consists of monthly mean grids for several variables from three runs of the ECHAM4 model. The three runs are a control (constant atmospheric forcing) run, a greenhouse gas run which assumes a compounded 1% per year increase in CO2, and an aerosol run which combines CO2 and sulphate aerosol concentrations. The model is run at T42 resolution, resulting in a 128 by 64 latitude/longitude gaussian output grid (approximately 2.8-degree by 2.8-degree resolution). The grids are in GRIB format (Edition 1).

DSS has computed decadal means for each decade-month from the monthly mean grids. The decade means are computed from years 0 through 9 of each decade. We also computed smoothed decadal means by computing 30-year running means of the decadal mean grids. Because of the large variability in the decadal means of variables such as precipitation, we recommend using the 30-year (smoothed decadal) means and applying them to the year at the middle of the 30-year period (i.e. - the 30-year mean for 2070-2099 should be applied at year 2085).

本数据集收录了德国德意志气候计算中心（Deutsche Klimarechenzentrum，简称DKRZ）提供的气候模型输出。模型输出包括来自ECHAM4模型三次运行的多个变量的月平均网格数据。这三次运行分别包括一个控制运行（恒定大气强迫），一个温室气体运行，假设每年CO2浓度以1%的复合增长率增加，以及一个结合CO2和硫酸盐气溶胶浓度的气溶胶运行。模型以T42分辨率运行，产生了一个128×64的经纬度高斯输出网格（约2.8度×2.8度分辨率）。网格数据以GRIB格式（第一版）存储。数据集服务系统（DSS）已从月平均网格数据中计算了每十年每月的平均值。十年平均值是通过计算每个十年0至9年的年数据进行得出的。此外，我们还通过对十年平均网格数据进行30年滑动平均计算，得出了平滑的十年平均值。鉴于如降水量等变量在十年平均值方面存在较大变异性，我们建议使用30年（平滑的十年）平均值，并将其应用于30年周期中点所在的年份（即，将2070-2099年的30年平均值应用于2085年）。