Page 1 Reduced Resolution Retrievals from MIPAS / MORSE and Oxford Level 2 Monitoring Alastair Burgess and Anu Dudhia Atmospheric, Oceanic and Planetary.

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Presentation transcript:

Page 1 Reduced Resolution Retrievals from MIPAS / MORSE and Oxford Level 2 Monitoring Alastair Burgess and Anu Dudhia Atmospheric, Oceanic and Planetary Physics, University of Oxford.

Page 2 Outline  23 Jan 06 ( Fabrizio )  New Level 1B dataset arrives (5 files)  Manually created by BOMEM using L1 prototype  “The dataset produced by Bomem with the new L1 prototype shows only the effect of using restituded attitude files, whereas they do not include truncation of the interferogram. In any case they will be useful to assess the impact of using the restituded attitude ADF, especially regarding comparison of enginering Vs retrieved tangent altitude”  Orbit (8 th July 2005)  MIP_NL__1P_17540-RES_ATT , RR 27 Sweeps  Compare against MIP_NL__1P_ cm-RES  (25 Jan 06. The IGM WAS truncated to 8cm, avoiding undersampling)  Orbit (1 st December 2004)  MIP_NL__1P_14404-RES_ATT , RR 17 Sweeps  Compare against MIP_NL__1PTETB _082603_ _00322_14404_0000.N1  (17 Feb 2005)

Page 3 Orbit  Attempted MORSE retrieval for all the operational species.  New RR MWs from Anu (not latest set)  Other parameters similar to ‘normal’ retrieval  Most profiles converged.  Investigate the difference at level 2 between the initial data and the 8cm truncated version.

Page 4 Orbit 17540

Page 5 Orbit 17540

Page 6 Orbit 17540

Page 7 Orbit 17540

Page 8 Orbit 17540

Page 9 Orbit 17540

Page 10 Orbit 17540

Page 11 Orbit – 8cm Truncated Difference  5-10 scans /90 differ.

Page 12 Orbit  Investigate changes in level 2 results due to changes in the prototype processor.  Same orbit –  1 st version arrived Feb 2005  2 nd version arrived Jan 2006  (Assuming that the newer file has actually been processed again)  No difference.

Page 13 Orbit 14404

Page 14 Orbit 14404

Page 15 Orbit 14404

Page 16 Orbit 14404

Page 17 Orbit – Difference from Earlier Version

Page 18 L2 Monitoring – Daily Coverage (Reprocessed)

Page 19 L2 Monitoring – Daily Coverage (Reprocessed)

Page 20 L2 Monitoring – Monthly Means

Page 21 L2 Monitoring – Monthly Means

Page 22 Summary  Oxford retrieval chain works with the new measurements  Overlapping FOV  Sweep counts other than 17  Lower spectral resolution data  RR data seems to retain a high scientific value.  Most scans are successfully retrieved.  No major artifacts from over sampling lower atmosphere.  When can we see more L1B!..  Monitoring at Oxford continues.  Recalculating all figures on the website to use the latest L2 processor version data (4.62), although a large amount of 4.61 remains. Have a look.