Will this effect WXSIM in any way?
[quote]TECHNICAL IMPLEMENTATION NOTICE 08-31
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
200 PM EDT WED APR 2 2008
TO: SUBSCRIBERS:
-FAMILY OF SERVICES
-NOAA WEATHER WIRE SERVICE
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
OTHER NWS PARTNERS…USERS AND EMPLOYEES
FROM: JASON TUELL
SCIENCE PLANS BRANCH CHIEF
OFFICE OF SCIENCE AND TECHNOLOGY /OST/
SUBJECT: GLOBAL FORECAST SYSTEM CHANGES: EFFECTIVE MAY 13 2008
EFFECTIVE TUESDAY MAY 13 2008…BEGINNING WITH THE 1200
COORDINATED UNIVERSAL TIME /UTC/ RUN…SEVERAL CHANGES WILL BE
MADE TO THE GLOBAL FORECAST SYSTEM /GFS/ MODELING SYSTEM. THESE
CHANGES ARE BEING MADE TO IMPROVE MODEL PERFORMANCE.
THE FOLLOWING FOUR CHANGES INVOLVE A SIGNIFICANT UPGRADE IN THE
CONSISTENCY AND ACCURACY OF THE MODEL RADIATION
PARAMETERIZATIONS:
- HOURLY RRTM1 LONGWAVE RADIATION RRTM SHORTWAVE RADIATION
- MAXIMUM-RANDOM CLOUD OVERLAP FOR SHORTWAVE GENERALIZED
AEROSOL TREATMENT AND REALISTIC CO2 - MINOR ADJUSTMENTS OF OROGRAPHIC GRAVITY WAVE VARIANCE RANGE
LIMITS AND MOUNTAIN BLOCKING BUG FIX - ENTHALPY THERMODYNAMIC PROGNOSTIC VARIABLE WHICH ALLOWS FOR
GREATER FLEXIBILITY AND IN CARRYING ATMOSPHERIC CONSTITUENTS
THE ANALYSIS CHANGES INCLUDE:
- ADDING WINDSAT NEAR SURFACE WINDS
- ADDING NOAA-18 SBUV/2 OZONE
- FOTO /FIRST-ORDER TIME-EXTRAPOLATION TO OBSERVATIONS/
- VARIATIONAL QC
- CHANGE IN LAND/SNOW/ICE SKIN TEMPERATURE VARIANCE
- FLOW DEPENDENT RE-WEIGHTING OF BACKGROUND ERROR VARIANCES
- BUG FIXES TO PROCESSING OF COSMIC GPSRO DATA…GROSS CHECK…
AND ADJUSTMENT OF OBSERVATION ERROR FOR VERTICALLY DENSE
OBSERVATIONS - CODE AND SCRIPT OPTIMIZATION
OTHER OUTPUT CHANGES INCLUDE:
- THE INTERNAL MODEL SPECTRAL /SIGMA/ FILE IS CHANGING ITS
FORMAT SLIGHTLY. THIS FILE IS NOT USED FOR PRODUCTS. ONLY ITS
HEADER INFORMATION IS CHANGING. USER