Ozone Data in the CFSRR

1
Ozone Data in the CFSRR

• Craig S. Long, Shuntai Zhou NCEP/CPC
• Russ Treadon, Jack Woollen, Haixai Liu NCEP/EMC
  
• Larry Flynn, Trevor Beck, Eric Beach
  NESDIS/STAR
• Donna McNamara NESDIS/OSDPD

2
Ozone in CFSRR vs R1R2 and ERA40

• CFSRR (and GFS)
• SBUV and SBUV/2 (version 8)
• Nadir Profiler 100 obs per orbit
• Sun-lite part of Earth
• Version 8 Attributes
• Climate trend quality
• Inter-satellite differences are minimized (at the
  equator)
• Better troposphere estimates
• V8 has more layers (21 vs 12)
• Calibrations of N16, 17, and 18 are configured to
  give similar results
• Expandable to hyperspectral instruments (i.e.
  OMI, GOME-2, OMPS (nadir)
• Integrated Profile Ozone regarded better than
  Best Ozone
• What about TOMS, MLS, GOME, OMI?
• R1 and R2
• Does not assimilate ozone
• Uses monthly climatological profiles and total
  ozone
• ERA40
• Did assimilate ozone
• SBUV and SBUV/2 (version 6)

3
Ozone Related Issues

• Treatment of ozone in CFSRR same as operational
  GFS
• Will ozone be reasonable in polar night
• Does it matter radiatively?
• No heterogenious ozone chemistry
• Ozone hole is created only by satellite obs
• Only a couple of years where satellite drift
  impacts timing of ozone hole observation.
• Where TOMS data would be a benefit to have.
• Restrictive use of data only flagged as good
• Minimal use of NOAA-14 data
• Transition from one satellite to the next
• Use as many satellites as possible with good
  data

4
Time Periods of SBUV and SBUV/2 ozone
productsMonths are inclusive

• Nimbus7 11/1978 - 06/1990
• NOAA9a 02/1985 - 04/1988
• NOAA11a 12/1988 - 09/1993
• NOAA9d 11/1992 - 01/1998
• NOAA14 07/1995 - 10/1995
• Covers 2 month gap in N9d (08 09/1995)
• NOAA11d 09/1997 - 03/2001
• NOAA16 10/2000 present
• NOAA17 07/2002 - present
• NOAA18 01/2006 present
• A one month gap in 03/1991 will be filled with
  profiles generated from TOMS data.

5
N18
N17
N16
N11d
N14
N9d
TOMS
N11a
N9a
N7
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8
Validation

• During CFSRR runs
• Monthly zonal mean comparisons against CPC SBUV/2
  zonal means.
• During evaluation period
• Comparisons against
• Ozonesondes
• Lidar
• Dobson/Brewers
• SAGE/HALOE
• MLS

9
Restrictive Use of only Good Data
V8 SBUV Profile Ozone QC Flagging Frequency Good
N7
N11a
N9d
N11d
N16
Percent Occurrence
10
Questions?