Diagnostics of the Performance of the NCEP Operational Global Analysis/Forecast System
Glenn H. White
National Centers for Environmental Prediction
W/NP23, World Weather Building
Washington DC 20233, USA
Glenn.White@NOAA.GOV

DISCLAIMER

Comparison of GFS Analyses and Forecasts With ECMWF

 

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GFSX April 2007

GFSX vs GFS April 2007

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Comparison of GFS Analyses and Forecasts With Other NWP Centers

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GFX Apr. 2007

GFX vs. GFS Apr. 2007

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March 2004

Powerpoint Differences in wind analyses and forecasts between GFS and ECMWF for Aug, 6, 2001 IC

Powerpoint Differences in wind analyses between GFS, ECMWF and other centers Oct. 5, 2011

Powerpoint Diagnostics of ensemble hybrid assimilation experiments NH summer Sept. 15, 2011

Powerpoint Performance of ensemble hybrid assimilation experiments NH summer August 23, 2011

Powerpoint First look at prd12q3i ensemble hybrid assimilation experiment NH summer August 12, 2011

Powerpoint Diagnostics of prd12q3h ensemble hybrid assimilation experiment NH summer July 31, 2011

Powerpoint Diagnostics of coupled data assimilation experiment NH winter and spring August 12, 2011

Powerpoint Performance of coupled data assimilation experiment NH winter and spring July 11, 2011

Powerpoint Performance of prd12q3h ensemble hybrid analysis experiment July 26, 2011

Powerpoint Change in 2m temperature with resolution in operational GFS July 19, 2011

Powerpoint Changes in 10 m winds and 2 m temperatures over US with recent GFS change May 8, 2011

Powerpoint Diagnostics of coupled gdas experiment NH winter part 1

Powerpoint Diagnostics of coupled gdas experiment NH winter part 2

Powerpoint Lazy mean's index for new gsi/gfsadjustments implemented May 9, 2011

Powerpoint Summary of coupled gdas experiments

Powerpoint Diagnostics of coupled gdas experiment NH summer

Powerpoint Scores for coupled gdas experiment NH winter

Powerpoint Scores for coupled gdas experiment NH summer

Powerpoint Overview of EMC Apr. 5, 2011

Powerpoint GCMWB Meeting Presentation on new gsi and gfs tuning tested June 2010-Feb. 2011 on Feb. 24, 2011

Powerpoint Diagnostics of new gsi and gfs tuning Dec. 2010-Feb. 2011

Powerpoint Skill of new gsi and gfs tuning Dec.2010-Feb. 2011

Powerpoint Skill of new gsi and gfs tuning June-Nov. 7, 2010

Powerpoint Diagnostics of new gsi and gfs tuning Sep.-Nov. 7, 2010

Powerpoint Skill Performance of new gsi and gfs tuning June16-Nov. 7, 2010

Powerpoint Performance of new gsi and bug fixes

Powerpoint Performance of new gsi and bug fixes

Powerpoint Performance of new gsi and bug fixes

Powerpoint Presentation on seasonal forecasting for Exeter, England

Powerpoint Effect of reducing background diffusion in the stratsophere

Powerpoint Normalized rms vector wind error in the old and new GFS

Powerpoint Effect of decreasing background diffusion in the stratosphere and winds in the old and new GFS

Powerpoint Presentation at the Wallace symposium Sept. 29, 2010 in Seattle, WA

Powerpoint Temperature biases in the new GFS

Powerpoint The effect of the new GFS implementation on Aug.10 skill

Powerpoint Changing thermal roughness in the GFS

Powerpoint EMC and the global precipitation mission--workshop presentation

Powerpoint Operational performance of the new GFS

Powerpoint Easterly wind surges in the new GFS

Powerpoint Verification of 2 meter temperature in the new GFS

Powerpoint 2 meter temperature in the new GFS

Powerpoint Wind bias in pre13a the new GFS

Powerpoint Pre13a and winds

Powerpoint Pre13a and Typhoon Marakot

Powerpoint Problems in the tropical stratosphere in pre13a

Powerpoint Systematic error in operational GFS and pre13a

Powerpoint Effect of using correct snow in pre13a

Powerpoint Snow error in pre13a

Powerpoint Comparison of flux fields in operational GFS and pre13a during DJF0910

Powerpoint Comparison of pressure level fields in operational and new GFS (pre13a) during DJF0910

Powerpoint Presentation on performance of T574 with new convection March 11, 2010

Powerpoint Yet Another Update of skill of T574 with new convection for winter 2009/2010 March 2010

Powerpoint Performance of operational and T574 with new convection in cases chosen by HPC and NHC Feb. 26, 2010

Powerpoint Update of skill of T574 with new convection for winter 2009/2010 Feb. 18, 2010

Powerpoint Update of skill of T574 with new convection for hurricane season 2009 Feb. 18, 2010

Powerpoint Diagnostics of flux fields from T574 experiments for hurricane season 2008 Jan. 25, 2010

Powerpoint Diagnostics of pressure fields from T574 experiments for hurricane season 2008 Jan. 19, 2010

Powerpoint Update of skill of T574 experiments for hurricane season 2008 Jan. 28, 2010

Powerpoint Weather briefing Review of model skill for 2009 Jan. 14, 2010

Powerpoint Skill of T574 experiments for hurricane season 2008 Jan. 11, 2010

Powerpoint Skill of fall package Dec 15, 2009

Powerpoint Tropical wind skill dropouts in fall package Nov 25, 2009

Powerpoint Skill of fall package Nov 16, 2009

Powerpoint Performance of fall package in forecasting Hurricane Bill

Powerpoint Diagnostics of proposed shallow convection package

Powerpoint Performance of proposed shallow convection package

Powerpoint Performance of operational GFS in September 2009

Powerpoint Comparison of hurricane structure in proposed and operational global analyses

Powerpoint Relative Contributions of Assimilation and Model Changes to Performance of Proposed Fall Package

Powerpoint Weather Briefing on Performance of Proposed Fall Package Sept. 24, 2009

Powerpoint Weather Briefing on Recent Performance of Operational Global NWP Models and different cycles of GFS August 13, 2009

Powerpoint Weather Briefing on Tests of T574 with changes in mountain blocking and gravity wave drag Jul 16, 2009

Powerpoint Weather Briefing on Tests of T574 with reduced orographic drag and with radiation package Jun 18, 2009

Powerpoint Tests of T574 with reduced orographic drag and with radiation package

Powerpoint Test of T574, 64 levels, Eulerian model

Powerpoint Weather Briefing Performance of operational GFS March 26, 2009

Powerpoint Test of T574, 64 layer, Eulerian GFS March 2009

Word document Illustration of top problems in GFS

Word document List of top problems in GFS

Powerpoint Effect of changing albedo on systematic performance of new gfs (pru11 vs. pru8) Feb. 25, 2009

Powerpoint Effect of changing albedo on skill of new gfs (pru11 vs. pru8) Feb. 18, 2009

Powerpoint Systematic performance of new gfs (pru8) vs. new gsi Feb. 16, 2009

Powerpoint Skill of new gsi Feb. 10, 2009

Powerpoint Skill of new gfs (pru8) Jan. 30, 2009

Powerpoint Systematic performance of new gsi Jan. 21, 2009

Powerpoint Skill of GFS vs. CDAS 1981-2008 (Bob Kistler)

Powerpoint Effect of vertical coordinate on new gfs Dec. 3, 2008

Powerpoint Performance of new gsi and new gfs coupled, uncoupled and with high resolution SST Nov. 19, 2008

Powerpoint Weather briefing September 25, 2008 skill, systematic performance of new GSI and GFS parallels (PRC1 and PRC3) with and without changes to stratus

Powerpoint Weather briefing September 11, 2008 skill, systematic performance of new GFS parallels (PRC1 and PRC3) coupled to ocean, with and without changes to stratus

Powerpoint Weather briefing August 28, 2008 skill, systematic performance of new GFS parallel (PRC1) coupled to ocean, changes to stratus

Powerpoint 2m temperatures in new gfs (prc1) Aug.22, 2008

Powerpoint Weather briefing August 14, 2008 skill, systematic performance of GSI parallels

Powerpoint Weather briefing July 31, 2008 review of GFS skill, systematic errors

Powerpoint Weather briefing July 17, 2008 performance of GSI parallels

Powerpoint Weather briefing June 19, 2008 model intercomparison

Powerpoint Weather briefing June 5, 2008 GSI changes vs. GSI and model changes

Powerpoint Weather briefing May 22, 2008 performance of parallels

Powerpoint Funny features in GFS in equatorial stratosphere

Powerpoint Weather briefing Apr.10, 2008 performance of parallels

Powerpoint Weather briefing Apr.10, 2008 stratus clouds in the CFSRR

Powerpoint Weather briefing Mar. 27, 2008 performance of parallels

Powerpoint Vertical circulations in ECMWF and GFS analyses

Powerpoint Weather briefing Feb. 14, 2008 transient eddy kinetic energy in the GFS

Powerpoint Weather briefing Jan. 31, 2008 performance of parallels

Powerpoint Weather briefing Jan. 17, 2008 performance of parallels

Powerpoint Weather briefing Jan. 2, 2008 GFS and other centers' performance

Powerpoint Weather Forecasting and the Global Precipitation Mission December 12 2007

Powerpoint Weather briefing December 6 2007

Powerpoint Weather briefing November 8 2007

Powerpoint Performance of the GFS/CFS in the tropics

Powerpoint Weather briefing October 11 2007

Powerpoint Weather briefing on performance of GFS during September 2007 and June-Aug. 2007 September 27 2007

Powerpoint Weather briefing on performance of GFS during June-Aug. 2007 September 13 2007

Powerpoint Weather briefing August 30 2007

Powerpoint Weather briefing on warm bias in GFS August 16 2007

Powerpoint Weather briefing August 2 2007

Powerpoint PPT presentation on warm bias in GFS

Powerpoint PPT presentation on physics parallel tests July 6 2007 to physics group

Powerpoint Weather briefing on physics parallel tests July 5 2007

Powerpoint Weather briefing on scores in physics parallel tests June 21 2007

Powerpoint Weather briefing on operational scores and systematic performance of GSI vs SSI June 7 2007

Powerpoint Weather briefing on parallel tests of GSI vs SSi and effect of tightening QC on GPS refractivity in tropics April 26 2007

Powerpoint Weather briefing on scores for parallel tests of GSI vs SSI March 1 2007

Powerpoint PPT presentation on gfs for San Francisco meeting on systematic error Feb. 12-16 2007

Powerpoint Poster presentation on gfs for San Francisco meeting on systematic error Feb. 12-16 2007

Powerpoint SSI vs. pry vs. prym (2 line change to pbl)

Powerpoint Weather briefing February 1, 2007 scores (Fanglin, Keith Brill), GSI vs. GFS

Powerpoint Transient eddies in the GFS and ECMWF analyses and forecasts

Powerpoint Weather briefing January 18, 2007

Powerpoint A Comparison of GFS clouds with three independent estimates for November 2006

Powerpoint Weather briefing January 4, 2007

Powerpoint GSI Without sfc p bug vs op SSI

Powerpoint GSI Without sfc p bug vs GDS with

Powerpoint Weather briefing December 7, 2006

Powerpoint Diabatic heating spin-up in GFS

Powerpoint Weather briefing November 9, 2006

Powerpoint Weather briefing October 12, 2006

Powerpoint Weather briefing September 28, 2006

Powerpoint Weather briefing September 14, 2006

Powerpoint Weather briefing August 31, 2006

Powerpoint Weather briefing August 17, 2006

Powerpoint African easterly jet in ECMWF and GFS analyses and GFS forecasts June-July 2006

Powerpoint Weather briefing July 20, 2006

Powerpoint Weather briefing July 6, 2006

Powerpoint GSI--6 hour errors

Powerpoint Hybrid parallel--Jun22

Powerpoint Hybrid parallel with corrected orography-flux results

Powerpoint Hybrid parallel with corrected orography-vertical velocity and cloud liquid water results

Powerpoint Hybrid parallel with corrected orography-wind results

Powerpoint Hybrid parallel with corrected orography-more results

Powerpoint Hybrid parallel with corrected orography

Powerpoint Hybrid parallel Apr16-May10,2006

Powerpoint Total ozone in parallel y vs parallel y with hybrid vs operational April 2006

Powerpoint Ozone in parallel y vs parallel y with hybrid vs operational April 2006

Powerpoint Parallel y vs parallel y with hybrid vs operational April 2006

Powerpoint Systematic errors in the southeast Pacific in DJF 05/06

Powerpoint Recent scores from the Met Office

Powerpoint Presentation on spin-up of precipitation and precipitable water Nov, 2005 in GFS and GSI hybrid

Powerpoint Presentation on analysis differences and 1-day forecasts in different nwp centers

Powerpoint Presentation on analysis increments in GFS and GSI hybrid

Powerpoint Presentation on glacial ice test

Powerpoint Presentation on glacial ice test

Powerpoint Presentation on glacial ice test

Powerpoint Presentation on test of GSI hybrid Nov.-Dec.05

Powerpoint Presentation on statistics on GSI/hybrid parallel performance Nov.-Dec.05

Powerpoint Presentation on GSI/hybrid parallel performance Nov.-Dec.05

Powerpoint Presentation on GSI/hybrid parallel performance

Powerpoint Presentation on GSI/sigma parallel tropical performance

Powerpoint Presentation on GSI/hybrid parallel Sep-Oct 05

Powerpoint Presentation to National Academy of Sciences panel on Global Precip Mission and NOAA

Powerpoint Presentation--Comparison of the operational with glacial ice parallel runs Aug. 2005

Powerpoint Presentation--Comparison of the operational with two parallel runs Aug-Sep. 2005

Powerpoint Presentation--Performance of the new GFS in JJA 2005

Powerpoint Presentation--Effect of the new GFS on the east Pacific problem in August 2004 and Comparison to ECMWF and UKMO

Powerpoint Presentation--Effect of the new GFS on the east Pacific problem in August 2004

Powerpoint Presentation--Effect of the new GFS on the east Pacific problem in September 2004

Powerpoint Presentation--History of the Galapagos problem in August 1999-2004

Powerpoint Presentation--Comparison of the operational and pry GFS June 1-10 2005

Powerpoint Presentation--Problems of the GFS in the Tropics

Powerpoint Presentation--Effect of changes in vegetative parameters on pry surface fluxes and fields in May 2005

Powerpoint Presentation--Comparison of spin-up in pry and operational systems Apr. 2005

Powerpoint Presentation--Further comparison of spin-up in pry and operational systems Apr. 2005

Powerpoint Presentation--PRY experiment with T382 system fields related to soil moisture Apr. 2005 and August 2004

Powerpoint Presentation--PRY experiment with T382 system fields related to soil moisture Mar-Apr. 2005

Powerpoint Presentation--PRY experiment with T382 system fields related to soil moisture Jan. 2005

Powerpoint Presentation--PRY experiment with T382 system fields related to soil moisture Aug.-Sep. 2004

Powerpoint Presentation--PRY experiment with T382 system Dec.4-Jan.21

Powerpoint Presentation--PRY experiments with T382 and T254 system with more iterations and different background error

Powerpoint Presentation--Summary of PRY experiments with T382 system to address analyis problems

Powerpoint Presentation--PRY experiments with T382 system to address analyis problems

Powerpoint Presentation--Evaluation of 45 day tests of shallow convection with momentum mixing and diffusion and mountain blocking--1st attempt

Powerpoint Presentation--Test of pry including diffusion and mountain blocking at T382 with assimilation Dec. 2004--1st attempt

Powerpoint Presentation--Tests of diffusion and mountain blocking at T254 with assimilation Dec. 2004

Powerpoint Presentation--Tests of diffusion and mountain blocking at T382 in Dec. 2004

Powerpoint Presentation--Further tests of diffusion and mountain blocking in Feb. 2004

Powerpoint Presentation--Cold Bias in the GFS in Nov. 2004--Part 2

Powerpoint Presentation--Parallel test of the global model in Nov. 04

Powerpoint Presentation--Cold Bias in the GFS in Nov. 2004

Powerpoint Presentations on Kistler's Tests of GFS on ASP and Blue

Powerpoint Presentation--blueaug

Powerpoint Presentation--bluefeb

Powerpoint Presentation--bluefb511

Powerpoint Presentation--asptest2

Powerpoint Presentation--asptests

Powerpoint Presentation--asp917

Powerpoint Presentation--bkasp

Powerpoint Presentation--Flip-flops in the GFS

Powerpoint Presentation--Forecasts busts of Sept. 22

A Powerpoint Presentation on Vertical Circulations in the East Pacific

A Powerpoint Presentation on Changes in Cloud Liquid Water in the First Time Step

A Powerpoint Presentation on Changes in Clouds, Radiation and Temperature during the First 24 Hours of the Forecast in February 2004

A Powerpoint Presentation on Changes in Clouds, Radiation and Temperature during the First 24 Hours of the Forecast

Powerpoint Presentation on A Comparison of GFS Analyses and Forecasts with Other Centers for March 2004

Powerpoint Presentation on A Comparison of ECMWF and GFS Analyses and Forecasts for March 2004

A Test of Changing Shallow Convection March-Apr 2004

A Comparison of ECMWF and GFS 850 hPa Winds for Nov. 2003

The Effect of Isolated Island observations and Skill in OLR

Test of new mountain parameterization in October 2003 (offline contact Glenn.White@noaa.gov)

Drift in operational model Aug.-Oct. 2003 (offline contact Glenn.White@noaa.gov)

Test of analysis changes in October 2003 (offline contact Glenn.White@noaa.gov)

Powerpoint Presentation on Systematic Errors in Temperature

Powerpoint Presentation for Branch Map Discussion of Parallel Test of RTM Long Wave Code June 12

Powerpoint Presentation for Branch Map Discussion of Moorthi's Trial of RTM Long Wave Code

Powerpoint Presentation for Branch Map Discussion of Comparison of Cold Bias in DJF 2002/03 and DJF 2001/02

Powerpoint Presentation for Branch Map Discussion of Analysis Differences between ECMWF and GFS

Powerpoint Presentation for Branch Map Discussion Transient Eddies in GDAS and NCEP-1

Extended Abstract (pdf file) for AMS 12th Conference on Interactions of the Sea and Atmosphere "Air-Sea Fluxes in NCEP's Global Forecast System"

Powerpoint Seminar on The Effect of Changing Cloudiness Parameterizations on Surface Fluxes in the GFS

Extended abstract for 15-60 day forecast workshop

Performance of the T254 model in April 2002 (offline contact Glenn.White@noaa.gov)

Performance of the T254 model in March 2002 (offline contact Glenn.White@noaa.gov)

Branch briefing May 2, 2002 on precipitable water in the T254 model (offline contact Glenn.White@noaa.gov)

Branch briefing March 7, 2002 on cold bias in the MRF (offline contact Glenn.White@noaa.gov)

Cold bias in the MRF

Tropical wind error in the East Pacific

Effects of truncation on precipitation (offline contact Glenn.White@noaa.gov)

A comparison of the MRF and FNOC in the tropics

Transient disturbances in individual forecasts (offline contact Glenn.White@noaa.gov)

Model analyses and forecasts of low-level stratus clouds in the east Pacific during JJA 2001

Model analyses and forecasts of the tropical disturbances at 15N and the equator (offline contact Glenn.White@noaa.gov)

A comparison of the old and new operational models in July 2001 (offline contact Glenn.White@noaa.gov)

Model analyses and forecasts of the tropical upper tropospheric trough during July 2001

Paper on systematic error for workshop on systematic error

Paper onNCEP global model fluxes for workshop on systematic error

Paper on air sea fluxes from NWP for workshop on air-sea fluxes

Paper comparing air sea fluxes from NCEP reanalysis and NCEP operational global analysis cycle for workshop on air-sea fluxes