# Presentation: 938319

## NARR Data at NCARStatus and PlansSteven J. Worley and Chi-Fan ShihScientific Computing Division @ NCAR

- Steven Worley, NSF/NCAR/SCD

- 11 January 2005

## NARR 3-hourly data at NCAR
Analysis and Flux files (aka .a and .b files)
1979 – 2003
4.2 TB
All on the NCAR MSS
Available to users with NCAR computing accounts
FTP and Web access
http://dss.ucar.edu/pub/narr

NARR Climatologies 
To be transferred from UCAR/JOSS

**Analysis and Flux files (aka .a and .b files)**
**1979 – 2003**
**4.2 TB**
**All on the NCAR MSS**
**Available to users with NCAR computing accounts**
**FTP and Web access**
**http://dss.ucar.edu/pub/narr**
**NARR Climatologies **
**To be transferred from UCAR/JOSS**

- Steven Worley, NSF/NCAR/SCD

- 11 January 2005

## Data file organization
Create six product datasets 
3D
29 pressure levels, 10 fields
1000 » 100 hPa, wind T Q CW...
CLM, Atmosphere Column
12 fields
precip. water, total cloud cover, ....
FLX,  Diagnostic Single Level Fields
75 fields
10m T Q wind, total rad. flux, .....

**Create six product datasets **
**3D**
**29 pressure levels, 10 fields**
**1000 » 100 hPa, wind T Q CW...**
**CLM, Atmosphere Column**
**12 fields**
**precip. water, total cloud cover, ....**
**FLX,  Diagnostic Single Level Fields**
**75 fields**
**10m T Q wind, total rad. flux, .....**

- Steven Worley, NSF/NCAR/SCD

- 11 January 2005

## 
PBL, Boundary Layer 
39 fields in near surface pressure layers
U in six 30mb layers starting at the surface, ....
SFC, Surface
43 fields
precipitations, heat and radiation flux,....
FLX.b, Accumulated and 3 hour average fluxes
From the “b” files
9 fields
Latent and sensible heat, short and long rad., ....

**PBL, Boundary Layer **
**39 fields in near surface pressure layers**
**U in six 30mb layers starting at the surface, ....**
**SFC, Surface**
**43 fields**
**precipitations, heat and radiation flux,....**
**FLX.b, Accumulated and 3 hour average fluxes**
**From the “b” files**
**9 fields**
**Latent and sensible heat, short and long rad., ....**

- Steven Worley, NSF/NCAR/SCD

- 11 January 2005

## Samples online

**One month sample online **
**January 1980**
**Suggestion about this approach?**

- Steven Worley, NSF/NCAR/SCD

- 11 January 2005

## NARR Product Data Volume
(based on estimates from January 1980)

**(based on estimates from January 1980)**

| Product | MB/day | GB/month | % NARR | GB (79-03) |
| --- | --- | --- | --- | --- |
| 3D | 269 | 8.0 | 58 | 2400 |
| CLM | 15 | 0.5 | 3 | 150 |
| FLX | 87 | 2.6 | 19 | 780 |
| PBL | 45 | 1.4 | 10 | 420 |
| SFC | 38 | 1.2 | 8 | 360 |
| FLX.b | 11 | 0.3 | 2 | 102 |
| Total | 465 | 14.0 |  | 4320 |

- Steven Worley, NSF/NCAR/SCD

- 11 January 2005

## NARR data access at NCAR

**Four modes of access**
**Directly from the NCAR MSS**
**Requires a computing account at NCAR**
**FTP or Web download product data files**
**Customized data packages prepared upon request**
**Negotiated with staff specialists and includes subsetting**
**By request put data on writable media (tape, disk, DVD, as appropriate)**

- Steven Worley, NSF/NCAR/SCD

- 11 January 2005

## NARR data user support

**User Support**
**Provide access software **
**Staff consultant **

- Steven Worley, NSF/NCAR/SCD

- 11 January 2005

## Key Related Activities

**Working on Arrangements to Acquire:**
**NARR monthly means**
**NARR observational BUFR data**
**NARR forecasts (TBD)**
**51 Year US Land Surface Hydrologic Reanalysis, Y. Fan and H.M. van den Dool**
**1/8°, 1948-1998, NCEP/NCAR Reanalysis forcing and CPC precipitation**

- Steven Worley, NSF/NCAR/SCD

- 11 January 2005

## Objective
Make large quantities of NARR data available for research

Timeline
Web and FTP service to the six products by middle February 05
Dependent on disk hardware installation

Collaboration
Not intended to duplicate service from NCDC
NOMADS is superior for multi-dimensional subsetting

**Make large quantities of NARR data available for research**
**Timeline**
**Web and FTP service to the six products by middle February 05**
**Dependent on disk hardware installation**
**Collaboration**
**Not intended to duplicate service from NCDC**
**NOMADS is superior for multi-dimensional subsetting**

- Steven Worley, NSF/NCAR/SCD

- 11 January 2005

## http://dss.ucar.edu/pub/narr

Questions?

Email suggestion to:
Chi-Fan Shih (chifan@ucar.edu)

**Questions?**
**Email suggestion to:**
**Chi-Fan Shih (chifan@ucar.edu)**

- Steven Worley, NSF/NCAR/SCD

- 11 January 2005