The Subseasonal Experiment (SubX)

Summary Reports
Subseasonal Meeting (20170207) MJO Evaluation (20170327) Subseasonal Summary Report (20170515) MJO Evaluation (20170727)

Design
Ensemble Prediction System	GEFS
Model Core	GSM
Ensemble Size	21 members (1 control and 20 perturbations)
Forecast Length	35 days
Resolution	T574L64 (0-192hrs); T382L64 (192-840hrs)
Uncoupled Investigation (1)
Period	20130901-20140228
Forecast Frequency	Daily
Experiments	1. Control (CTL): analysis SST relaxes to climatology 2. Optimum (RTG): realistic SST forcing every 24 hours 3. Forcing (CFS): CFSv2 predicted SST forcing every 24 hours 4. Forcing (CFSBC):CFSv2 predicted anomaly with bias correction
Results	Routine Verification (10 bins) Routine Verification (10 bins; Exp. 1-3; with CFSv2) Routine Verification (3 bins) HSS Verification (3 bins)
Uncoupled Investigation (2)
Period	20140501-20160526
Forecast Frequency	Every 5 days
Experiments	1. CTL (STTP): analysis SST relaxes to climatology 2. SPs: CTL with updated stochastic physics (SKEB+SPPT+SHUM) 3. SPs+CFSBC: SPs with CFSv2 predicted SST anomaly with bias correction 4. SPs+CFSBC+NSST: SPs+CFSBC with NSST 5. SPs+CFSBC+CNV: SPs+CFSBC with updated convection scheme
Results	Routine Verification (Exp. 1-4) Routine Verification (Weak MJO; Exp. 1-4) Routine Verification (Strong MJO; Exp. 1-4) Routine Verification (Exp. 4-5) Week 2/3&4 Verification (Exp. 1-3,5) HSS Verification (Exp. 1-4) RPSS Verification (Exp. 1-3,5)