New Datasets and Features

NOAA ESRL 20th Century Reanalysis Version 2 six-hourly data for 1871-2008. The analysis is performed with the Ensemble Filter as described in Compo et al. (2006) based on the method of Whitaker and Hamill (2002). Observations of surface pressure and sea level pressure from the International Surface Pressure Databank station component version 2 (Gleason et al. 2008), ICOADS (Woodruff et al. 2009), and the International Best Track Archive for Climatic Stewardship (IBTrACS, Kruk et al. 2010) were assimilated every six hours.

The IRI Server now has a local copy of all the mean fields; the IRI copy of the spread will be extended as needed. This should address some of the performance problems we were having.

The combined instrument rain calibration algorithm (3B-42) uses an optimal combination of 2B-31, 2A-12, SSMI, AMSR and AMSU precipitation estimates (referred to as HQ), to adjust IR estimates from geostationary IR observations. Near-global estimates are made by calibrating the IR brightness temperatures to the HQ estimates.

NOAA ESRL 20th Century Reanalysis Version 2 six-hourly data for 1891-2008. The analysis is performed with the Ensemble Filter as described in Compo et al. (2006) based on the method of Whitaker and Hamill (2002). Observations of surface pressure and sea level pressure from the International Surface Pressure Databank station component version 2 (Gleason et al. 2008), ICOADS (Woodruff et al. 2009), and the International Best Track Archive for Climatic Stewardship (IBTrACS, Kruk et al. 2010) were assimilated every six hours.