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CAMS GA Aircraft Measurements by Schlager

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Aircraft measurements in the Asian Summer Monsoon Anticyclone –support of flight planning by CAMS forecasts

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CAMS GA Aircraft Measurements by Schlager

  1. 1. Hans Schlager DLR-Institute of Atmospheric Physics, Oberpfaffenhofen Aircraft measurements in the Asian Summer Monsoon Anticyclone – support of flight planning by CAMS forecasts CAMS General Assembly, Athens, 14-16 June 2016
  2. 2. Topics • Asian Summer Monsoon Anticyclone – interesting feature to validate CAMS • OMO aircraft campaign in 2015 with CAMS support • Observations versus CAMS forecasts for a selected case • CAMS forecasts for future campaigns: STRATOCLIM (2016) and EMERGE (2017, 2018).
  3. 3. Features: ASM anticyclone is one of the largest synoptical features on Earth Isolated air mass by closed circulation Input of BL air by frequent deep convection Located over very polluted region – ASM cause large-scale dispersion of pollution Area of trop-strat exchange Alternation of combined and splitted Tibetian and Iranian anticyclones (Park et al. 2007) ASMA Seasonal Picture Calipso (Vernier et al, 2011) ATAL
  4. 4. Modes of the Asian Summer Monsoon Anticyclone
  5. 5. Modes of the Asian Summer Monsoon Anticyclone
  6. 6. Modes of the Asian Summer Monsoon Anticyclone
  7. 7. (Park et al. 2007) ASMA Seasonal Picture Calipso (Vernier et al, 2011) Questions What are the main source regions of the air masses confined in the anticyclone? Are there sharp gradients across the edge of the anticyclone? How much reactive nitrogen is in the anticyclone? Is there enhanced photochemistry in the anticyclone? What is the source and nature of the aerosol layer in the anticyclone? ATAL
  8. 8. Participating institutions • • • • • • • •
  9. 9. OMO Measurement Flights 14 flights in the period 21 July – 27 Aug 2015 (120 flight hrs) Region in the UT influenced by convection and monsoon dynamics Region with pristine air masses Air masses from NA (aged emissions) Paphos Gan
  10. 10. OMO Measurements • Emissions from naturel and anthropogenic sources (CO, CH4, NOx, SO2, NMVOC and their isotopes) • short-lived radicals (OH, HO2, ROx, BrO) • long-lived oxidants (e.g. O3) • reaction intermediates (aldehydes, ketones) • products that can be removed from the atmosphere • by deposition processes (acids, peroxides) • water vapor • radiation • number concentration of Aitken aerosols
  11. 11. Forecast / Analysis Tools • ECMWF meteorological forecasts • CAMS chemical forecasts • Forecasts of air mass backward and foreward trajectories • METEOSAT 7 imagery (IR and Vis) CAMS CO / ppb 150 hpa 23 Aug 15
  12. 12. CAMS Forecast of CO at 150 hPa, 13 Aug 15, 12 UTC and HALO flight route
  13. 13. Latitude / °N HALO observations 13 Aug 2015 flight (CO data : H. Fischer et al. MPI-C)
  14. 14. CAMS Forecast of SO2 at 150 hPa, 13 Aug 15, 12 UTC and HALO flight route
  15. 15. CAMS Forecast of NOx at 150 hPa, 13 Aug 15, 12 UTC and HALO flight route
  16. 16. Air mass 10-days backward trajectories
  17. 17. Air mass 10-days backward trajectories
  18. 18. Outlook: STRATOCLIM July/Aug 2016 Kalamata Nagpur
  19. 19. Coupling of CAMS with the DLR Mission Support System User Interface Flight planning & post-campaign data analysis MAP selection WMS selection Way points selection
  20. 20. ECMWF Forecasts coupled with the DLR Mission Tool
  21. 21. Qutlook: Use of CAMS Forecasts for EMERGE in 2017 & 2018 Excess CO from Megacities / ppb
  22. 22. Conclusions • A distinct chemical composition was observed within the ASM anticyclone with sharp trace gas gradient at the edge • CAMS forecasts were very useful for the planning of the HALO flights during OMO • Key chemical species (e.g. NOx, SO2) were well simulated by CAMS • An interactive tool for the CAMS forecasts would further intensify the use of CAMS in field campaigns (e.g. coupling of CAMS with the DLR mission tool) • Easy access of CAMS analysis chemical data would suppport post-campaign data analysis and comparisons Many thanks to the CAMS team !!! (contact: hans.schlager@dlr.de)

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