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Julia Remmers 1 , Thomas Wagner 1

This study investigates the azimuthal distribution of trace gases and aerosols measured during the MADCAT campaign in Mainz, Germany in the summer of 2013. The measurements are compared to simulations, and daily developments are analyzed. The results show good agreement between instruments and highlight the influence of aerosol properties on the measurements.

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Julia Remmers 1 , Thomas Wagner 1

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  1. Azimuthal variability of trace gases and aerosols measured during the MADCAT campaign in summer 2013 in Mainz, Germany Julia Remmers1, Thomas Wagner1 • 2) University of Heidelberg, Germany • BIRA/IASB, Brussels, Belgium • 6) University of Colorado, Boulder, USA • MPI for Chemistry, Mainz, Germany • 3) University of Bremen, Germany • 5) CAS Hefei, China Steffen Beirle1, Caroline Fayt4, Udo Frieß2,Clio Gielen4, MyojeongGu1,Francois Hendrick4,Christian Hermans4,Martin Horbanski2, Ted Koenig6,Johannes Lampel2, Ang Li5, YuhanLuo5, Alexis Merlaud4,Jan Nasse2, Ivan Ortega6, Lara Penth2, Enno Peters3, GaiaPinardi4, Andreas Richter3,André Seyler3,Reza Shaiganfar1, Frederik Tack4,Michel van Roozendael4, Rainer Volkamer6,Yang Wang1, FolkardWittrock3,PinhuaXie5

  2. Content • MAD-CATcampaignoverview • AzimuthaldistributionofO4, NO2 and H2O • Comparisontosimulations • Daily development • Conclusion &Outlook DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  3. MAD-CAT: Instruments andAims • Setup: • 16 MAX-DOAS instruments • 6 azimuthscanninginstruments • Car-MAX-DOAS operatedby 3 groups • NO2-CE-DOAS (Heidelberg) • Aeronetstationon the same building • … • Aims: • Compare DSCDs oftheinstruments • Investigateazimuthdistributions • …. Intensive Phase: June tobeginningofJuly 2013 Extended Phase: untilmidofOctober2013 DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  4. Multi Axis DOAS – ComparisonCampaignforAerosols andTrace Gases Standard viewingdirection: 51° (towards Frankfurt) Airport 1320 takeoffs per day 1320 takeoffs per day DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  5. AzimuthalComparisons • 6Groups: Bremen, Boulder, Heidelberg, Mainz, Brussels, Hefei • (minimum) 1 scanevery 2 hours severalgroupsmademoremeasurements • Elevation: 2° • Usedascomparison/quality check: Aeronet, AllSkyCamera, Ceilometer • NO2 and H2O fromvissmallanalysissetting (411-445nm) • O4 from UV analysissetting (338-370nm) • Focus on 2 cleardays DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  6. Azimuthscans: roundview GaiaPinardi • (minimum) 1 scanevery 2 hours severalgroupsmademoremeasurements • Elevation: 2° • Daily reference DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  7. All Instruments, full Day NO2 O4 Bremen Boulder Heidelberg Mainz • The resultsofthe different instrumentsare in goodagreement • Goodspatialand temporal resolution DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  8. Simulation: McArtimaerosolinput • pressureandtemperaturefromweatherstationnearby (JG University Mainz)  O4 VCD • Aerosol profileshapefromCeilometer • AOD fromAeronet Deutschmann et al..: The Monte carlo Atmosphericradiative transfer model McArtim: Introduction and validation of Jacobians and 3-D features, J.Quant. Spectrosc.Ra., 112, 1119–1137, 2011 DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  9. O4Comparisonmeasurementandsimulation: clearday 1: 18.06.13 Sun Azimuth Pointingtowardsobstacles  Simulation sometimeshigherthanmeasurement DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  10. O4Comparisonmeasurementandsimulation: Clear day 2: 08.07.13 Factor: 0.75-0.8 Simulation isalwayslowerthanthemeasurements  Whatisthedifferencebetweenthetwodays? DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  11. 18.06.13 08.07.13 • Possiblereasons: • Different aerosolproperties • Lowestlayer (150m) wrongextrapolation Enviromentalmeasurementstationin Mainz

  12. First try: enhance profile for lowest 150m DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  13. First try: enhanceprofileforlowest 150m Sun Azimuth • Simulated O4 DSCDs arelower • Can‘tbetheonlyexplanation DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  14. O4Comparisonofthe 2 cleardays: • The O4 canbesimulatedverywell • somequestionsare still open • Lowest 150m haveinfluence • Aerosol opticalproperties? DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  15. H2O Comparisonmeasurementandsimulation: clearday 1: 18.06.13 12 UTC (+/-0.25h) H2O: expontialprofileassumed  Azimuthalvariabilityof H2O issurprisingly large DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  16. H2O Comparisonmeasurementandsimulation: clearday2: 08.07.13 12 UTC (+/-0.25h) H2O: expontialprofileassumed  Azimuthalvariabilityof H2O issmall, but there DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  17. NO2Comparisonmeasurementandsimulation: clearday 1: 18.06.13 12 UTC (+/-0.25h) NO2: Box Profile 500m DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  18. NO2Comparisonmeasurementandsimulation: clearday 1: 18.06.13 12 UTC (+/-0.25h) NO2: Box Profile 200m with exponentialdecrease on top • NO2 Variation is larger thanthevariationinducedbydifferences in SZA/SRAA DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  19. NO2Comparisonmeasurementandsimulation: clearday2: 08.07.13 12 UTC (+/-0.25h) NO2: Box Profile 500m DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  20. NO2Comparisonmeasurementandsimulation: clearday2: 08.07.13 12 UTC (+/-0.25h) NO2: Box Profile 200m with exponentialdecrease on top • NO2 Variation is in theorderofvariationby SZA/SRAA DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  21. Daily developmentday 1: O4 and H2O 6 UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  22. Daily developmentday 1: O4 and H2O 7 UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  23. Daily developmentday 1: O4 and H2O 8 UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  24. Daily developmentday 1: O4 and H2O 9UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  25. Daily developmentday 1: O4 and H2O 10UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  26. Daily developmentday 1: O4 and H2O 11UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  27. Daily developmentday 1: O4 and H2O 12UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  28. Daily developmentday 1: O4 and H2O 13UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  29. Daily developmentday 1: O4 and H2O 14UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  30. Daily developmentday 1: O4 and H2O 15UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  31. Daily developmentday 1: O4 and H2O 16UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  32. Daily developmentday 1: O4 and H2O 17UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  33. Daily developmentday 1: O4 and H2O 18UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  34. Daily developmentday2: O4 and H2O 6 UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  35. Daily developmentday2: O4 and H2O 7UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  36. Daily developmentday2: O4 and H2O 8UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  37. Daily developmentday2: O4 and H2O 9UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  38. Daily developmentday2: O4 and H2O 10 UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  39. Daily developmentday2: O4 and H2O 11UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  40. Daily developmentday2: O4 and H2O 12UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  41. Daily developmentday2: O4 and H2O 13UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  42. Daily developmentday2: O4 and H2O 14UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  43. Daily developmentday2: O4 and H2O 15UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  44. Daily developmentday2: O4 and H2O 16 UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  45. Daily developmentday2: O4 and H2O 17UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  46. Daily developmentday2: O4 and H2O 18UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  47. Daily developmentofO4 and H2O • Day 1: H2O does not followtheazimuthdependenceof O4 •  gradients in H2O • Day 2: theazimuthdependenceof H2O andof O4aresimilar •  smallgradients in H2O DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  48. Daily developmentday1: NO2 8 UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  49. Daily developmentday1: NO2 9UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

  50. Daily developmentday1: NO2 10 UTC DOAS Workshop, 07.07.2015, Julia Remmers MPIC

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