Changes between Version 35 and Version 36 of Doc/Config/IPSLCM6_rc0

Timestamp:

06/12/15 12:11:12 (9 years ago)

Author:

servonnat

Comment:

--

Doc/Config/IPSLCM6_rc0

@@ -191 +191 @@
 
 Root-Mean-Square Error calculated on the seasonal cycle over the globe (land + ocean) against two different references for each variable. This metric synthesizes the bias (difference in mean), the spatio-temporal correlation and standard-deviation ratio. The results are presented in % of the mean RMSE of piControl2 => a result of -10% indicates that the RMSE is 10% lower than the average RMSE of the reference simulation (here, five seasonal cycles of piControl2) ; the blue color shows the RMSE that are lower (in better agreement with the reference dataset) than the reference simulation. Inversely, the red color indicates a degradation compared with the reference simulation. For each simulation, the RMSE are shown for several seasonal cycles to illustrate the interannual/decadal variability of the results.
+For further illustration of the differences between IPSL-CM5A-LR and CM6A-VLR_rc0 with new water routing scheme and p_magic = -0.01, please refer to the following atlases:
+- IPSL-CM5A-LR: http://dods.extra.cea.fr/work/p86caub/IPSLCM5A/DEVT/piControl/CTLCM5V5v5/ATLAS/SE_2500_2539/ATM/ATM.html
+- IPSL-CM6A-VLR_rc0: http://dods.extra.cea.fr/work/p86caub/IPSLCM6/PROD/piControl/CTLCM6G/ATLAS/SE_3250_3299/ATM/ATM.html
 
 The table shows that :
-- CTLCM5V5v5 has similar results as piControl2 (less than 5%) ; this suggests that CM6A-VLR_rc0 (with new water routing scheme and same p_magic as CM5A-LR) simulates a climate that is very similar to IPSL-CM5A-LR
+- CTLCM5V5v5 has similar results as piControl2 (less than 5%) ; this suggests that CM6A-VLR_rc0 (with same water routing scheme and same p_magic as CM5A-LR) simulates a climate that is very similar to IPSL-CM5A-LR
 - Same for CTLCM6F
 - CTLCM6G and CTLCM6H (IPSLCM6A-VLR_rc0 with new water routing scheme and p_magic = -0.01) and piControl2pm01 (p_magic = -0.01) show a reduction of the error on the 2m-temperature (tas) of around 15%, very likely associated with the adjustment of albedo (p_magic = -0.01)
-- For those simulations, we also note a degradation of the LW up (rlut and rlutcs) between 5 and 10% (greater than the variability among the seasonal cycles of piControl2), probably linked with the p_magic (mainly concerns the tropics, not shown); in the same time, the SW gets significantly better (around 5%)
-- For CTLCM6G and CTLCM6H, we also see a slight degradation of the zonal wind at 10m (uas), of the same order as the LW ; looking at the RMSE tables for the different seasons and regions, we can see that this degradation mainly concerns the tropics (-20/20°N) and the extra-tropical southern hemisphere
+- For those simulations, we also note a degradation of the LW up (rlut and rlutcs) between 5 and 10% (greater than the variability among the seasonal cycles of piControl2); this is confirmed by the bias maps of CTLCM6G (http://dods.extra.cea.fr/work/p86caub/IPSLCM6/PROD/piControl/CTLCM6G/ATLAS/SE_3250_3299/ATM/lw_116852/lw.pdf) compared with CTLCM5V5v5 (http://dods.extra.cea.fr/work/p86caub/IPSLCM5A/DEVT/piControl/CTLCM5V5v5/ATLAS/SE_2500_2539/ATM/lw_26556/lw.pdf) ; this change mainly concerns the tropics; in the same time, the metric table shows that the SW gets significantly better (around 5%)
+- For CTLCM6G and CTLCM6H, we also see a slight degradation of the zonal wind at 10m (uas), of the same order as the LW ; looking at the RMSE tables for the different seasons and regions, we can see that this degradation mainly concerns the tropics (-20/20°N) and the extra-tropical southern hemisphere. On the bias maps (compare http://dods.extra.cea.fr/work/p86caub/IPSLCM5A/DEVT/piControl/CTLCM5V5v5/ATLAS/SE_2500_2539/ATM/vitu_44109/vitu.gif with http://dods.extra.cea.fr/work/p86caub/IPSLCM6/PROD/piControl/CTLCM6G/ATLAS/SE_3250_3299/ATM/vitu_60643/vitu.gif) we see that the zonal wind biases are the same but slightly reinforced in CTLCM6G. 
 - For the other variables, the results do not show significant differences between piControl2 and IPSLCM6A-VLR_rc0 (with the new water routing scheme and p_magic = -0.01, simulations CTLCM6G and CTLCM6H)