IRI Data Library What's New

NOAA ESRL 20th Century Reanalysis Version 2 (extended)

Mon, 24 May 2010 14:39:02 GMT

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.

TRMM_3B42 Precipitation Estimates

Tue, 23 Mar 2010 16:25:27 GMT

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

Tue, 23 Mar 2010 15:45:27 GMT

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.

CMAP global precipitation data updated

Tue, 02 Mar 2010 14:45:58 GMT

The latest monthly (January 2010) and pentad (November 2009) releases of the CPC Merged Analysis of Precipitation (CMAP) have been added.

MODIS version 005 reflectivity, NDVI, and EVI for North America

Tue, 02 Mar 2010 14:42:22 GMT

MODIS version 005 reflectivity, NDVI, and EVI data at 250-meter resolution for Alaska, Canada, and southern North America have been added.

MODIS 1-km, 8-day land surface temperature data for New York state

Tue, 02 Mar 2010 14:39:07 GMT

Terra MODIS Version 005 1-km, 8-day composite land surface temperature (LST) data for New York state added

IRI FD CCM3v6 Forecast ca_sst updated and becomes operational

Fri, 29 Jan 2010 19:46:00 GMT

The CCM3v6 model forced by constructed-analogue SST has been updated from January 2003 through January 2010. It will be updated monthly from this time forward.

CPC GHCN-CAMS global monthly gridded land-only surface air temperature

Mon, 28 Sep 2009 15:11:53 GMT

The Climate Prediction Center's GHCN-CAMS global monthly gridded (0.5 degree lat./lon. resolution) land-only surface air temperature data set has been added. It includes monthly surface air temperature data from January 1948 to the present and is updated in real time. This product is an analysis based upon station data from both the Global Historical Climatology Network version 2 (GHCN) and the Climate Anomaly Monitoring System (CAMS).

NASA GPCP Version 2.1 monthly precipitation dataset has been added

Mon, 28 Sep 2009 14:43:13 GMT

The latest version (version 2.1) of NASA's Global Precipitation Climatology Project (GPCP) monthly precipitation data set has been added to the Data Library. The product includes multiple estimated precipitation variables and error estimates derived from various combinations of IR and microwave satellite and gauge observations. The satellite-gauge product is updated from time to time with more recent observations.

average now has a /keepgrids option

Mon, 14 Sep 2009 14:08:49 GMT

The average operator normally removes each independent variable that is averaged over, so that, for example, a mean can easily be removed from an entire time series. But there is now a /keepgrids option, which keeps the independent variable as a single point grid. This is most useful for downloading to software that insists on a time grid.