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JRA55-do vs ERA5 #29

Closed julia-neme closed 2 years ago

julia-neme commented 3 years ago

I repeated #26 analysis using ERA5 now :) I believe ERA5 is more similar to JRA55 than ERA-Interim.

The new perturbation run #28 would be a little bit trickier to set up because ERA5 has some overly large wind speeds (>50m/s) that ECMWF recommends replacing with 4m wind (https://confluence.ecmwf.int/display/CKB/ERA5%3A+large+10m+winds)

julia-neme commented 3 years ago

Mean field historical period Zonal wind uas-jra55_vs_era5-historical-mean Meridional wind vas-jra55_vs_era5-historical-mean

Climatology from the historical period (anomalies with respect to the mean) Zonal wind uas-jra55_vs_era5-historical-climatology Meridional wind vas-jra55_vs_era5-historical-climatology

julia-neme commented 3 years ago

Trends for the historical period Zonal wind uas-jra55_vs_era5-historical-trend

Meridional wind vas-jra55_vs_era5-historical-trend

Trends by season Zonal wind uas-jra55_vs_era5-historical-trends-seasonal

Meridional wind vas-jra55_vs_era5-historical-trends-seasonal

julia-neme commented 3 years ago

Regional time series (yearly averages)

basins-reference (1)

Zonal wind uas_onshelf-regions-yearly-era5

Meridional wind vas_onshelf-regions-yearly-era5

AndyHoggANU commented 3 years ago

OK, so, it seems like the trends and patterns are now consistent between JRA and ERA, but that the magnitude is still slightly larger in JRA, in general?

Thanks for the tip about ERA. I will pass that on to Andrew and Nic.

StephenGriffies commented 3 years ago

Just to be sure: when you say "JRA" do you mean "JRA55-do" used to run the model, or the raw JRA55 reanalysis? Also, is it raw ERA or the modified ERA developed by DRAKKAR group? The following paper considers these four datasets, as well as NCEP versus CORE winds. We did not focus on the Antarctic region, but there might be some hints as to what differences there are between the raw reanalysis versus the modified reanalysis.

https://www.sciencedirect.com/science/article/pii/S1463500318303779?via%3Dihub

julia-neme commented 3 years ago

Hi @StephenGriffies, yes I am using JRA55-do and I raw ERA5 (replicated from here https://confluence.ecmwf.int/display/CKB/ERA5%3A+data+documentation).

Yes @AndyHoggANU I think the patterns are now more consistent, magnitude larger for JRA55-do