Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 1 Recent MIPAS L2 Data Retrieved at Oxford Anu Dudhia University of Oxford
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 2 Oxford processor MORSE uses same L1B/microwindows as ESA data, but optimal estimation algorithm. Now also processing NRT data (available ~ hours after acquisition) - only NOM mode pT, H2O and O3 ~hours: NRT L1B Data available 2 days: NRT Oxf L2 Data completed 2 weeks: OFL L1B Data available 3 weeks: OFL Oxf L2 Data completed /
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 3 Temperature 10mb
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 5 Temperature 65S-90S 10mb
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 6 Temperature 20S-20N 10mb
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 7 Temperature 65N-90N 10mb
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 8 NO2 65N-90N 1mb
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 9 Winter 2007/2008 Conclusions No obvious problems with MIPAS retrievals Dynamically: series of major stratospheric warmings during Jan/Feb (including 40K in 4 days Jan 19-23) but quiet since March Chemically: fairly ‘standard’ winter
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 10 Comparison of NRT and “Off-Line’’ Data Identical OXF L2 processing used for both Since NRT data started on 19 Feb 08 and latest OFL data completed for 24 Feb 08, only 6 days overlap so far
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 11 L1B NRT Data Produced since 19 Feb 08 Usually available within a couple of hours of acquisition from Kiruna (8/9 orbits) or ESRIN (5/6 orbits) ftp sites Deleted approximately 10 days after acquisition Some disruption in flow during ATV mission but basically robust
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 12 L1B NRT Data Anomalies Frequent duplicate orbits from ESRIN (but not Kiruna) One second time difference compared with OFL data (OFL sweep seconds later than NRT) Occasionally NUM_SWEEPS_PER_SCAN= (instead of expected value ) Know bug - should be fixed with IPF 5.00 All AB band spectra flagged as corrupt in one orbit (31912, 7Apr08) Missing update of MIP_CO1 auxiliary file
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 13 L1B Altitude
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 14 L1B Altitude
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 15 L1B Altitude
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 16 Temperature
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 17 Pressure
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 18 H2O
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 19 O3
Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG16 Venice Apr 2008 Page 20 NRT Data - Conclusions L1B NRT data production generally robust Spectral shift is main distinction between NRT and OFL L1B Data No significant bias in L2 data, but scatter ~noise random error from spectral shift.