< p >我们缺少一些ERA5数据信息。你有在grib2或netcdf格式吗?然而,看一看< a href = " https://code.mpimet.mpg.de/projects/cdo/embedded/index.html " rel = " nofollow noreferrer " > < / >文档。你可以与cdo的<代码> abs命令> < /代码。这将是这样的:< / p > < pre > <代码> cdo expr, absPET =“abs (PET)”-mergetime infile1 infile2 infile3 outputfile which makes a new variable absPET
in the output file. expr
makes it possible to evaluate expressions, like abs()
.