BiasPrLonRmse
Computes the zonal root mean square error (RMSE) of equatorial Pacific (150°E-90°W) climatological (time and meridional 5°S-5°N average) precipitation (PR) between model and observations
GPCPv2.3 1979-2018 (main)
20CRv2 1871-2012, CMAP 1979-2018, ERA-Interim 1979-2018, NCEP2 1979-2018
equatorial Pacific
model and observations regridded toward a generic 1°x1° grid (using cdms esmf linear method)
- detrending (if applicable)
- temporal average
- regridding (if applicable)
- meridional average
- RMSE computation
monthly
mm/day
precipitation (PR)
The first level shows the diagnostic used to compute the metric and highlight the main differences between the model and the reference
Figure 1: bias in the zonal structure of time-mean precipitation (PR) in the equatorial Pacific (5°S-5°N averaged), measuring mainly the increased precipitation in the eastern Pacific and decreased precipitation in the western Pacific. The black and blue curves show respectively the reference and the model. The metric derived is the zonal RMSE between the model curve and the reference curve
The second level shows the broader picture to better understand the spatial pattern of the bias: the map of the time-mean in the equatorial Pacific
Figure 2: bias of time-mean precipitation (PR) in the equatorial Pacific, showing mainly the double intertropical convergence zone (ITCZ) bias. The left and right maps show respectively the reference and the model