BiasPrLatRmse

double_ITCZ_bias: meridional structure of time-mean PR in the eastern Pacific

Description:

Computes the meridional root mean square error (RMSE) of eastern Pacific (15°S-15°N) climatological (time and zonal 150-90°W average) precipitation (PR) between model and observations

Reference observations:

GPCPv2.3 1979-2018 (main)

20CRv2 1871-2012, CMAP 1979-2018, ERA-Interim 1979-2018, NCEP2 1979-2018

Region:

Niño3_LatExt

Regridding:

model and observations regridded toward a generic 1°x1° grid (using cdms esmf linear method)

Steps (computation):

detrending (if applicable)
temporal average
regridding
zonal average
RMSE computation

Time frequency:

monthly

Units:

mm/day

Variable name:

precipitation (PR)

Dive down Level 1:

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 meridional structure of time-mean precipitation (PR) in the eastern Pacific (150-90°W averaged), measuring mainly the double intertropical convergence zone (ITCZ) bias. The black and blue curves show respectively the reference and the model. The metric derived is the meridional RMSE between the model curve and the reference curve

Dive down Level 2:

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