Summary of cycle 47r2

Implementation date	2021-05-11	See News article
Detailed description of changes	Implementation of IFS Cycle 47r2
Key characteristics of our forecasting system	Key characteristics of our forecasting system
Resolution	Horizontal (unchanged) Atmospheric (unchanged) HRES: O1280 ENS (days 1-15): O640 ENS extended (days 16-46): O320 Wave (unchanged) HRES-WAM: 0.125° ENS-WAM: 0.25° ENS-WAM Extended: 0.5° Ocean (unchanged) NEMO: 0.25°	Vertical Atmospheric HRES: L137 ENS: L137 Ocean (unchanged) NEMO: 75
Data set affected	HRES ENS Tropical cyclone track
Score card	The change to single precision is neutral in terms of HRES skill but there are benefits of the increased levels in the ENS. The ensemble score card is overwhelmingly positive and statistically significant (occasional negative changes are small in magnitude.) Scorecards presenting the new cycle performance are regularly updated: HRES scorecard ENS scorecard
Meteorological changes	Reduction to single precision arithmetic in the HRES and ENS forecasts and increase ENS forecast vertical resolution from 91 to 137 model levels
Meteorological impact	Tropical cyclones ENS vertical profiles Zonal-mean temperature MJO Convective indicators
Technical changes	ENS/ENS extended resolution increase from 91 to 137 model levels GRIB encoding BUFR encoding Software
Model ID	Atmospheric: 152 Ocean wave: 117
New and changed parameters	HRES ENS Tropical Cyclone track
Discontinued disseminated model output	Not applicable
e-suite experiment number	75