An intercomparison of two reanalysis datasetsCAMS vs. ERA۵

Although reanalysis products cover various variables on a global scale, their performance isdifferent across regions. This study evaluates two reanalysis datasets, namely CAMS and ERA۵,based on an in situ measured temperature over Tehran for three successive years of ۲۰۱۶, ۲۰۱۷,and ۲۰۱۸. The results show that both reanalysis datasets capture the general pattern of daily andmonthly variability. Both datasets contain a cold bias. Despite the enhanced spatial resolution ofERA۵, it turns out that ERA۵ is more biased than CAMS. Furthermore, a detailed assessment ofmodel performance indicates that more than ۸۰% of the error is associated with bias.

کلیدواژه ها:

reanalysis ، evaluation ، bias