CDO

Hello everyone

I have a method that I tested in Rstudio and I would like to implement this method to cdo since I have to adapt that method to different files and could save some time doing it. So here is my problem. I have a 400 year long SST Anomaly dataset from a Climate model that cointains a trend in the approximately last 150 years. I suggest this is forced by CO2 increase and there fore made the following regression to fit the trend: SSt <- Intercept + b * CO2. I then took the fitted values and subtracted them from the SSt(Anomaly) file, which gave me an stationary Time Series. Applying this method to cdo I got stuck hoewever. I tried the following thing: cdo trend CO2.nc afile.nc bfile.nc // cdo subtrend SSt_Anomaly.nc afile.nc bfile.nc detrended_SSt_Anomaly.nc. The result was not what I was looking for. Does anyone has a suggestion to solve this issue. Thanks for the help