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Ozone Data in the CFSRR

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. Ozone in CFSRR vs R1&R2 and ERA40. CFSRR (and GFS) SBUV and SBUV/2 (version 8)

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Ozone Data in the CFSRR

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  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 R1&R2 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) • TOMS (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

  6. 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

  7. Restrictive Use of only ‘Good’ Data V8 SBUV Profile Ozone QC Flagging Frequency: Good N7 N11a N9d N11d N16 Percent Occurrence

  8. Questions?

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