NorCPM1 contribution to VolRes-RE
---------------------------------

1. Download instructions 

For downloading all data (original DCCP hindcasts, WMO forecasts and 
VolRes-RE forecasts) do 

wget http://ns9039k.web.sigma2.no/dcpp/VolRes-RE/NorCPM1_VolRes-RE_20230306.tar
tar xvf NorCPM1_VolRes-RE_20230306.tar


2. Data description 

The output includes 
 DCCP hindcasts (start years 1960-2018)
 WMO decadal forecasts (start years 2019-2021)
 VolRes-RE decadal forecasts (start dates 20211101 and 20220401) 

Important note regarding start of simulation output: 

In all files with start dates 1960-2019, the first month of output is October,
i.e., the last month of the NorCPM1 assimilation experiment which is one month 
prior to start of the decadal forecast. 
 
From 2020, the first month of output is November, i.e., the first month of the 
decadal forecast.  

Important note regarding start date 20211101: 

In order to verify that the NorCPM1 setup we used in VolRes-RE reproduces the 
of our WMO decadal forecast setup, we reran the WMO decadal forecast for the 
start date 20211101 that uses constant background volcanic forcing. 
The output from the new simulations is stored in 20211101new.  


3. Verification 

Plot showing monthly Volc-NoVolc GMST differences for start date 20211101
http://ns9039k.web.sigma2.no/dcpp/VolRes-RE/diag/gm_TREFHTNorCPM1_mem01-30_Volc-NoVolc_s20211101.png

Plot showing monthly Volc-NoVolc GMST differences for start date 20220401
http://ns9039k.web.sigma2.no/dcpp/VolRes-RE/diag/gm_TREFHTNorCPM1_mem01-30_Volc-NoVolc_s20220401.png

Plot showing monthly NoVolc WMO-VolRes-RE GMST differences for start date 20211101
http://ns9039k.web.sigma2.no/dcpp/VolRes-RE/diag/gm_TREFHTNorCPM1_mem01-30_NoVolc_new-old_s20211101.png