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NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 1

From CINDI to CINDI-2 Discussion . NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 1. Why a follow -up campaign after CINDI?. First CINDI campaign was very successfull 24 DOAS/MAXDOAS systems 4 in-situ NO 2 / aerosol analysers

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NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 1

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  1. From CINDI to CINDI-2 Discussion NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 1

  2. Why a follow-up campaignafter CINDI? • First CINDI campaignwasverysuccessfull • 24 DOAS/MAXDOAS systems • 4 in-situ NO2/ aerosolanalysers • Raman + backscatteraerosol lidars • NO2 lidar • First demonstration of NO2 sonde by KNMI • 10+ ongoing publications: Roscoe et al., Piters et al., Irie et al., Zieger et al., Pinardi et al., Wittrock et al., Friess et al., Spinei et al., Sluis et al. • But… • Measurement synchronisation imperfect, pointingaccuracy issues • Interpretation of NO2measurementslimited (littleancillary information on vertical distribution and on horizontal gradients around the site) • No long-pathmeasurements • No aircraftmeasurements • Weather conditions as good as canbe in The Netherlands NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 2

  3. What more for CINDI-2 ? • More aerosolmeasurements? • More DOAS measurements? • long-path DOAS • miniDOASnetwork (Pandora?) • Aircraftmeasurements? • In-situ sensors • AMAXDOAS • Imaging DOAS • More satellite validation? NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 3

  4. E-mail Dominik Brunner, 3/07/2012 Aircraft NO2 instrument • Option 1: simple commercial instrument (as for CINDI) modified for use on an aircraft. OK as long as the aircraft doesn’t fly very high (say < 3000 m) • Option 2: more sensitive instrument as used during the SPURT aircraft measurement campaigns. That instrument is owned by ETH and was operated for some time at Jungfraujoch. A few months ago it was rented out to DLR which has made a complete revision of the instrument (exchanged the pump, etc.). From Hans Schlager I have heard that the instrument is in good shape at the moment. I could ask ETH (Thomas Peter) whether they would be interested and willing to operate this instrument for the campaign. • Option 3: rent the NOxtoy instrument of Bruno Neininger. • Option 4: Empadevelops a completely new instrument based on QCL laser technology. Very accurate and reliable, especially for NO2. I doubt, that such an instrument would be ready for operation on an aircraft by early 2014. Aircraft • Bruno Neininger would be interested in operating his DIMONA aircraft during the campaign. Bruno has a very long experience in this kind of measurements and is at the same time reliable, flexible, and cheap. He is currently involved in another ESA project to measure CO2 and CH4 profiles. Cost: The basis for the calculation is a 2-week measurement campaign with a total of 3 active days with 6 flight hours per active day plus the ferry. Total cost: 40’400 EUR • Problem with Metair is that reliable operation of their NOxtoy instrument is quite a laborious task. The instrument is very sensitive but other compounds interfere with the NO2 measurement and these interferences need to be carefully calibrated/eliminated. APEX • Interest from EMPA to participate with the APEX instrument. If funding available, it would be great to fly APEX as well, for example to characterize the horizontal distribution of NO2 along the line-of-sight of the MAX-DOAS instruments. APEX would have to be flown on another aircraft than the Spanish one. RSL is currently evaluating different potential platforms. We are also evaluating options to fly APEX together with an in-situ NO2 instrument. NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 4

  5. Funding • ESA? • S5P/TROPOMI validation programme (stronginterestwithin MAG) • CEOS intercalibrationfollow-up? • EU? • National? NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 5

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