ECMWF Joint Observing System Simulation Experiment (OSSE) Validation Data

[Summary]

A broad group of US and international partners organized and agreed to have ECMWF compute a high resolution global gridded dataset that serves as a reference dataset for general and collaborative Observing System Simulation Experiments (OSSE).   This model output is termed a “Nature Run”, because it is intended to be a best representation possible of the true environmental conditions.  The temporal and spatial resolutions are sufficient so the data can be used as an experimental sample and validation data for planning future observing systems.  It is especially valuable for assessing future satellite systems.

Summary of the background of Joint OSSEs is posted at http://www.emc.ncep.noaa.gov/research/JointOSSEs/data/ECMWF_Joint_OSSE_NR_BackGround.html

Complete description of the data is posted at

http://www.emc.ncep.noaa.gov/research/JointOSSEs/data/ECMWF_Joint_OSSE_NR_Data_Description.html

Update and news are posted http://www.emc.ncep.noaa.gov/research/JointOSSEs/data/ECMWF_Joint_OSSE_NR_Update.html

[Usage and credit ]

This data must not be used for commercial purposes. ECMWF and the Joint OSSEs must be given credit in any publications in which these data are used.  A user list at NCAR will be kept  and shared with ECMWF and the Joint OSSE.  Redistribution rights are not given. 

If you are interested in using the dataset, please send the following note by e-mail with your name and affiliation to Michiko Masutani at michiko.masutani@noaa.gov.  Your name will be added to the user list and sent to ECMWF.

"I agree not to copy the ECMWF data or software  for use by other persons, and I agree to not use these data and/or software for commercial purposes.  ECMWF will be given credit in any publications in which these data and/or software are used.  I understand that if other persons in my organization wish to use these data and/or software, they must also sign a copy of this agreement. "

[Data distribution]

The complete data for T511NR and T799NR are saved at ECMWF, NCEP, NASA/GSFC, and ESRL.  Model level data and surface data are saved as a reduced gaussian grid.   Regular lat-lon grid data for pressure levels, isentropic levels and surface data are also provided for verification purposes.

The Nature Run is also available scientists do not have account at ECMWF,NCEP,NASA/GSFC, or ESRL .

Access to the complete data is available from the NASA/GSFC portal system:

http://portal.nccs.nasa.gov/perl/index.pl

Requires a user name and password.

Contact person Harper Pryor (Harper.Pryor@nasa.gov)

Gradsdods access:

T511NR model resolution data are also available from the OPeNDAP server

http://opendap.nccs.nasa.gov:9090/dods/OSSE/T511/

Gradsdods access is available for T511 NR. The data can be down loaded  in grib1, NetCDF,  binary.  The data can be retrieved  globally or selected region. 

            Provide IP number to :Arlindo da Silva (Arlindo.Dasilva@nasa.gov)

T511NR verification data and cloud are saved at NCAR Mass Storage Systems.  The ID for the data set is  ds621.0. 

[Contacts]

US contact:

Michiko Masutani michiko.masutani@noaa.gov

ECMWF:

Erik Andersson         Erik.Andersson@ECMWF.int

NASA/GSFC NCCS  data  portal:

Harper Pryor  Harper.Pryor@nasa.gov

NASA/GSFC  OSSE OPeNDAP server

Arlindo da Silva (Arlindo.Dasilva@nasa.gov)

NCAR:  Steve Worley (worley@ucar.edu)

[Related links]

Progress and meeting notes are posted at:

http://www.emc.ncep.noaa.gov/research/JointOSSEs

THORPEX OSSE home page:

http://www.emc.ncep.noaa.gov/research/THORPEX/osse

Michiko Masutani Ph.D. (RSIS)

NOAA/NWS/NCEP/EMC

5200 Auth Rd. Rm 207 Camp Springs MD 20746

michiko.masutani@noaa.gov

Office: (301)763-8000x7551

   Cell: (240)413-6727

   Fax:  (301)763-8545

Verification data at NCAR MSS  as of July 2007

Format:  Grib 1

Type:  regular lat lon grid

Updates:    as required

Coverage: global

[Data description in each directory ]

[T511 NR verification data ]

/T511NR/

Contain verification data for T511 NR

/T511NR/pl.date.links.tar

/T511NR/pt.date.links.tar

Expanding these tarballs generates the directories pl.date.links and pt.date.links and links for  pl.date and pt.date.  

Names of link contain only verification date and accessible to grads.

Original file include forecast hour and verification date.

These files will be expanded to

/T511NR/pl.date.links /T511NR.pl.1by1.$date.grib   

/T511NR/pt.date.links/T511NR.pt.1by1.$date.grib

/T511NR/pl.tm

Verification data are provided for 1deg x 1deg for T511 NR.

Time series for pressure levels and  pressure data on 1deg x 1deg grid.
Time series at 1000, 925, 850, 700, 600, 500, 400, 300, 250, 50, and 10 HPa levels.

Dprs     155      Divergence [s**-1]

Tprs     130      Temperature [K]

Uprs     131      U velocity [m s**-1]

Vprs     132      V velocity [m s**-1]

VOprs  138      Vorticity (relative) [s**-1]

Zprs     129      Geopotential [m**2 s**-2]

Wprs    135      Vertical velocity [Pa s**-1]

Qprs    133      Specific humidity [kg kg**-1]

/T511NR/pl.date

Verification data are provided for 1deg x 1deg for T511 NR.

Pressure data at each time period for 31 pressure levels:

1000 975 950 925 900 850 800 775 750 700 650 600 550 500 450 400 350 300 250 200 150 100 70 50 30 20 10 7 5 3 2 1

Variables
CCprs              248      Cloud cover [(0 - 1)]

CIWCprs         247      Cloud ice water content [kg kg**-1]

CLWCprs        246      Cloud liquid water content [kg kg**-1]

Dprs                 155      Divergence [s**-1]

O3prs                          203      Ozone mass mixing ratio [kg kg**-1]

Qprs                133      Specific humidity [kg kg**-1]

Rprs                 157      Relative humidity [%]

Tprs                 130      Temperature [K]

Uprs                 131      U velocity [m s**-1]

Vprs                 132      V velocity [m s**-1]

VOprs              138      Vorticity (relative) [s**-1]

Wprs                135      Vertical velocity [Pa s**-1]

Zprs                 129      Geopotential [m**2 s**-2]

/T511NR/pt.tm

Verification data are provided for 1deg x 1deg for T511 NR.

Time series of isentropic level data (315, 330, 350, 370, 530).

Dtht                  155      Divergence [s**-1]

MONTtht         53        Montgomery potential [m**2 s**-2]

O3tht               203      Ozone mass mixing ratio [kg kg**-1]

PREStht           54        Pressure [Pa]

PVtht               60        Potential vorticity [K m**2 kg**-1 s**-1]

Qtht                 133      Specific humidity [kg kg**-1]

Utht                  131      U velocity [m s**-1]

Vtht                  132      V velocity [m s**-1]

VOtht               138      Vorticity (relative) [s**-1]

/T511NR/pt.date

Verification data are provided for 1deg x 1deg for T511 NR.

Isentropic level data for each time period.

Five potential temperature levels: 315,330,350,370,and 530.

Dtht                  155      Divergence [s**-1]

MONTtht         53        Montgomery potential [m**2 s**-2]

O3tht               203      Ozone mass mixing ratio [kg kg**-1]

PREStht           54        Pressure [Pa]

PVtht               60        Potential vorticity [K m**2 kg**-1 s**-1]

Qtht                 133      Specific humidity [kg kg**-1]

Utht                  131      U velocity [m s**-1]

Vtht                  132      V velocity [m s**-1]

VOtht               138      Vorticity (relative) [s**-1]

/T511NR/sfc.tm

Verification data are provided for 1deg x 1deg for T511 NR.

Time series of surface data on a 1deg x 1deg grid.

U10m   165      10 metre U wind component [m s**-1]

V10m   166      10 metre V wind component [m s**-1]

TD2m 168      2 metre dewpoint temperature [K]

T2m     167      2 metre temperature [K]

CP       143      Convective precipitation [m]

HCC    188      High cloud cover [(0 - 1)]

LCC    186      Low cloud cover [(0 - 1)]

LSP     142      Stratiform precipitation [m]

MCC   187      Medium cloud cover [(0 - 1)]

MSL    151      Mean sea-level pressure [Pa]

SKT     235      Skin temperature [K]

TCC    164      Total cloud cover [(0 - 1)]

SD       141      Snow depth [m of water equivalent]

Orog

Orography on a 1deg x 1deg grid at 12Z May 1, 2005.

T511NR/ml.date/200505

Sample model level data for T511 NR.

[T799 NR verification data ]

T799NR/OCT05

Verification data for T799 OCT05

T799NR/OCT05/tm_1by1

Verification data for T799NR  OCT05

Time series of surface data on a 1deg x 1deg grid.

U10m   V10m   TD2m T2m      CP       HCC    LCC    LSP     MCC   MSL    SKT     TCC    SD

/T799NR/OCT05/pl.date

Pressure level data in   0.5deg x 0.5deg regular lat lon grid

Pressure data at each time period for 31 pressure levels:

1000 975 950 925 900 850 800 775 750 700 650 600 550 500 450 400 350 300 250 200 150 100 70 50 30 20 10 7 5 3 2 1

T799NR/APR06

Verification data for T799NR  Apr06

Same as T799NR/OCT05 except for APR06

[Cloud   data for verificaton ]

Cloud/RTN

Air Force Nephanalysis Cloud Processed at NOAA/NCEP/EMC

Contact person: 

Kenneth Campana   Kenneth.Campana@noaa.gov .

References

Hamill, T. M., R. P. d'Entrement, and J. T. Bunting, 1992: A description of the Air Force real-time, nephanalysis model, Weather and Forecasting, 7, 288-306.

Henderson-Sellers, A. 1986: Layer cloud amount for January and July 1979 from 3D-Nephanalysis, J. Climate Appl. Meteor., 24, 118-132.

Frequency of the data:  1 hour

All files are compressed and tared.

Each file cover one hour and has five records

dd,mm,yy,TCC,hh

dd,mm,yy,HCC,hh

dd,mm,yy,MCC,hh

dd,mm,yy,LCC,hh

dd,mm,yy,BCC,hh

TCC,HCC,MCC,LCC,BCC are written in 32 bits as big endian real.

Array of (361,181).  0E is repeated.

255.0 is used for missing data. dd,mm,yy,hh are integers.

Cloud/CLAVRX

Cloud from AVHRR Extended (CLAVR-x) produced by NOAA/NESDIS is processed by NOAA/NCEP/EMC.

http://cimss.ssec.wisc.edu/clavr/

Contacts:

NESDIS          Andrew  Heidinger andrew.heidinger@noaa.gov

EMC               Kenneth Campana   Kenneth.Campana@noaa.gov

format: Grib 1