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1 SRI International, Menlo Park, CA

Aerosol Optical Depths from Airborne Sunphotometry in INTEX-B/MILAGRO as a Validation Tool for the Ozone Monitoring Instrument (OMI) on Aura.

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1 SRI International, Menlo Park, CA

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  1. Aerosol Optical Depths from Airborne Sunphotometry in INTEX-B/MILAGROas a Validation Tool for the Ozone Monitoring Instrument (OMI) on Aura John Livingston1, Jens Redemann2, Philip Russell3, Stephanie Ramirez2, Qin Zhang2, Omar Torres4, Edward Browell5, John Hair5, Y. Shinozuka6, Cameron McNaughton6, Antony Clarke6, Alexander Smirnov4, Brent Holben4 1SRI International, Menlo Park, CA 2BAERI, Sonoma, CA3NASA Ames, Moffett Field, CA 4NASA Goddard, Greenbelt, MD5NASA Langley, Hampton, VA6U. Hawaii, HI Aura Validation & Science Team MeetingBoulder, CO Sep 2006

  2. J31 in INTEX-B/MILAGRO: Instrument Locations AATS-14 SSFR POS RSP NavMet CAR

  3. 14-channel Ames Airborne Tracking Sunphotometer (AATS-14) Measures: Solar direct-beam transmission, T, at 14 wavelengths, l=353-2139 nm Data products • Aerosol optical depth (AOD) at 13 l, 353-2139 nm • Water vapor column content [using T(940 nm)] • Aerosol extinction, 340-2139 nm • Water vapor density } When A/C flies vertical profiles Livingston/Russell, Aura ST, Boulder, Sep 2006

  4. INTEX-B/MILAGROJ31 made 13 science flights out of Veracruzto Mexico City and over Gulf of Mexico Livingston/Russell, Aura ST, Boulder, Sep 2006

  5. 4 J31 flights have AOD data coincident or near-coincident with OMI-UV AOD data This talk focuses on 2 flights: 10 Mar (over Gulf)19 Mar (over Mexico City) INTEX-B/MILAGRO Primary OMI UV aerosol product: absorption optical depth.Comparisons here are extinction optical depth Livingston/Russell, Aura ST, Boulder, Sep 2006

  6. Goal: Compare Aerosol Optical Depth (AOD) from AATS Measurements and OMI Retrievals Background Example:MODIS-Aqua AOD Cells, with J31 flight track from INTEX-A superimposed Russell et al., JGR, in review, 2006 Livingston/Russell, Aura ST, Boulder, Sep 2006

  7. Background Example:Comparison of Aerosol Optical Depth (AOD)from MODIS-Aqua and AATS-14 in INTEX-A Livingston/Russell, Aura ST, Boulder, Sep 2006 Russell et al., JGR, in review, 2006

  8. Background Example:Comparisons of Aerosol Optical Depth (AOD)from MODIS-Terra &-Alpha with AATS-14 in INTEX-A MODIS AATS-14 Russell et al., JGR, in review, 2006 Livingston/Russell, Aura ST, Boulder, Sep 2006

  9. INTEX-B: 10 Mar 2006 J31 flight track on MODIS-Aqua true-color image, ~19:57 UT A-Train, ~15 minutes Grid cells for OMI AODs Livingston/Russell, Aura ST, Boulder, Sep 2006 Aura/OMI overpass: 20:13 UT

  10. J31/AATS Profiles Show Altitudes of Extinction Layers Altitude [km] Livingston/Russell, Aura ST, Boulder, Sep 2006 AOD Extinction [1/km]

  11. Comparison of AOD spectra from AATS & OMI 10 Mar 2006 Livingston/Russell, Aura ST, Boulder, Sep 2006

  12. Comparison of AOD spectra from AATS & OMI 10 Mar 2006 Livingston/Russell, Aura ST, Boulder, Sep 2006

  13. 4 J31 flights have AOD data coincident or near-coincident with OMI AOD data 2nd flight: 19 Mar (over Mexico City)  Very difficult case for validation (spatial structure, AATS altitude). Interesting case & rich data set (AERONET, DC-8 lidar + in situ, other J31 sensors. Livingston/Russell, Aura ST, Boulder, Sep 2006

  14. 19 Mar 2006 J31 flight track on MODIS-Aqua true-color image, ~19:52 UT A-Train, ~15 minutes Livingston/Russell, Aura ST, Boulder, Sep 2006 Aura/OMI overpass: 20:07 UT

  15. Photo from DC-8 over Mexico City, 19 Mar 2006 Courtesy of Cam McNaughton Livingston/Russell, Aura ST, Boulder, Sep 2006

  16. J31 Flight Track, 19 Mar 2006, Mexico City & Downwind Colored Dots:OMI AOD Grid Cell Centers AERO-NET Aura overpass: 20.11 UT Livingston/Russell, Aura ST, Boulder, Sep 2006 glint angle, satellite elev viewing angle printed in blue to left of each OMI location

  17. NNE of Mexico City T2 N of T1 “Visibility poor. Eyes burning in cockpit.” Livingston/Russell, Aura ST, Boulder, Sep 2006

  18. AERONET T2 Livingston/Russell, Aura ST, Boulder, Sep 2006

  19. AERONET AOD at T2, 19 Mar 2006 Aura overpass: 20.11 UT Livingston/Russell, Aura ST, Boulder, Sep 2006 ~460 m above T2, ~780 m above T1 J31/AATS: T2 N of T1

  20. Comparison of OMI, AATS, & AERONET AOD at T2, 19 Mar 2006 AATS ~460 m above ground; Above much of AOD Livingston/Russell, Aura ST, Boulder, Sep 2006

  21. J31 Flight Track, 19 Mar 2006, Mexico City & Downwind Colored Dots:OMI AOD Grid Cell Centers AERO-NET Aura overpass: 20.11 UT Livingston/Russell, Aura ST, Boulder, Sep 2006 glint angle, satellite elev viewing angle printed in blue to left of each OMI location

  22. AATS AOD at T0, 19 Mar 2006: Less spatial variability, more wavelength dependence J31/AATS around T0 ~20.41-20.48 UT Livingston/Russell, Aura ST, Boulder, Sep 2006 “Much clearer as we approach T0.” ~480 m above T0, ~510 m above ground

  23. Comparison of OMI, AATS, & AERONET AOD at T0 & T0-A, 19 Mar 2006 Surface albedo effect? AERONET, T0-A AATS-14, T0 Livingston/Russell, Aura ST, Boulder, Sep 2006

  24. Other J31 instruments measure surface albedo (SSFR) and BRDF (RSP & CAR) AATS-14 SSFR POS RSP NavMet CAR

  25. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  26. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  27. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  28. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  29. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  30. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  31. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  32. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  33. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  34. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  35. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  36. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  37. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  38. Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO T2------------------------- T1---------------------------- T0-------------------------------- Livingston/Russell, Aura ST, Boulder, Sep 2006

  39. 19:25 UT,DC-8 over J31 at T2 E. Browell, J. Hair et al. DC-8 over J31 between T1 & T0, 20:15 UT Livingston/Russell, Aura ST, Boulder, Sep 2006 DC-8 over J31 NW of T0, 20:28 UT

  40. Large depolarization suggests dust: consistent with AOD l-dep E. Browell, J. Hair et al. Livingston/Russell, Aura ST, Boulder, Sep 2006

  41. Y. Shinozuka, A. Clarke Livingston/Russell, Aura ST, Boulder, Sep 2006

  42. Summary (work in progress) • 4 days of OMI-J31 coincidence (so far) 10 Mar over Gulf: OMI & AATS AODs agree for OMI cells closest to J31 min-alt leg.More cells possible by extending allowed range of OMI SSA 3 Mar (not shown) similar agreement over Gulf19 Mar, Mexico City: Much more complicated, but richer data set.- DC-8 lidar, in situ - Not Shown: J31 RSP (goal: AOD, size, nr, ni, shape retrievals below J31) - Surface albedo (J31 SSFR) & BRDF (J31 RSP & CAR) Livingston/Russell, Aura ST, Boulder, Sep 2006

  43. End of PresentationRemaining Slides are Backup Livingston/Russell, Aura ST, Boulder, Sep 2006

  44. J31 in INTEX-B/MILAGRO: Instrument Locations AATS-14 SSFR POS RSP NavMet CAR

  45. E. Browell, J. Hair et al. Livingston/Russell, Aura ST, Boulder, Sep 2006

  46. Y. Shinozuka, A. Clarke Livingston/Russell, Aura ST, Boulder, Sep 2006

  47. Y. Shinozuka, A. Clarke Livingston/Russell, Aura ST, Boulder, Sep 2006

  48. Aerosol Optical Depths from Airborne Sunphotometry in INTEX-B/MILAGROas a Validation Tool for the Ozone Monitoring Instrument (OMI) on Aura Aura Validation & Science Team MeetingBoulder, CO Sep 2006

  49. 10 Mar 2006, J31 Flight VER 05 Altitude & AOD on first descent Livingston/Russell, Aura ST, Boulder, Sep 2006 UT

  50. J31 in INTEX-B/MILAGRO: Payload (RSP) Livingston/Russell, Aura ST, Boulder, Sep 2006

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