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PRADACS 2011 – Contribution by MPIC Mainz, Particle Chemistry Deptartment Station: East Peak

PRADACS 2011 – Contribution by MPIC Mainz, Particle Chemistry Deptartment Station: East Peak Johannes Schneider, Anja Roth, Stephan Borrmann. General objectives: Analyze the microphysical and chemical properties of Cloud residuals Interstitial aerosol particles

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PRADACS 2011 – Contribution by MPIC Mainz, Particle Chemistry Deptartment Station: East Peak

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  1. PRADACS 2011 – Contribution by MPIC Mainz, Particle Chemistry Deptartment Station: East Peak Johannes Schneider, Anja Roth, Stephan Borrmann

  2. General objectives: • Analyze the microphysical and chemical properties of • Cloud residuals • Interstitial aerosol particles • Out-of-cloud aerosol particles • by combination of aerosol mass spectrometry and CVI at the East Peak station • Specific questions: • Identify the influence of photochemical aging of organic aerosol for cloud activation • Identify the amount of marine organic aerosol in cloud residuals • Quantify the relative cloud activation efficiency of organic marine vs. inorganic marine aerosol

  3. Interstitial CVI Manual or automatic switching OPC SMPS ALABAMA (Laser Ablation Single Particle MS) C-ToF-AMS(w/ Light Scattering Module for single particle detection) MAAP OPC UV-APS SMPS ALABAMA: Aircraft-Based Laser Ablation Aerosol Mass Spectrometer, Brands et al., Aerosol Sci. Technol., 45, 46-64, 2011

  4. Instruments behind CVI 1 radioactive neutralizers needed (241AM). Shipping of 241Am neutralizers difficult. Maybe other groups (US, Puerto Rico) can lend us neutralizers (85Kr will do).

  5. Instruments behind interstitial inlet 1 radioactive neutralizers needed (241AM). Shipping of 241Am neutralizers difficult. Maybe other groups (US, Puerto Rico) can lend us neutralizers (85Kr will do).

  6. Time: We can only participate in the Oct./Nov. campaign Personnel: Johannes Schneider, Anja Roth (PhD student), + NN (PostDoc) Power requirements: 230V or 115V, max. 4 kW total power

  7. What are your inlet requirements (e.g., flows, material, T/RH conditions)? Interstitial inlet: stainless steel tubing, RH ~30%, our flow: ~ 20 lpm CVI inlet: provided by Stephan Mertes Do you have pump needs (e.g., is a shelter needed for your pumps, does your pump exhaust need filtering?) no Do you have constraints on conditions in sampling building (e.g., temperature range, temperature stability)? T < 35°C What are the servicing needs of your instruments (if servicing is to be supplied by UPR) -e.g., changing filters, filling reservoirs, daily checks, calibrations… N/A Is internet/modem needed for instrument access, data transfer or other purposes at the measurement site? Not mandatory, but would be a great help Can/will you run an ntp client on your instrument so all instruments at a site can be time-synched? Never did so, can do time synch manually once a day Do you need facilities for decanting/analyzing/preserving sampling at sampling site? no What basic meteorology measurements are desired and at what frequency? (The plan is to provide data at 15-min time resolution unless otherwise required.) 15-min meteorology would be ok (wind speed, direction, rain rate, humidity, temperature, pressure, radiation) Other deployment issues not covered here or in previous instrument questionnaire? no

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