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Possible contributions from Lund University, Sweden

Possible contributions from Lund University, Sweden. Aerosol measurements Göran Frank , Bengt Martinsson, Staffan Sjögren, Maria Berghof. For planning. No funding currently available => we cannot promise to participate in the project

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Possible contributions from Lund University, Sweden

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  1. Possible contributions from Lund University, Sweden Aerosol measurements Göran Frank, Bengt Martinsson, Staffan Sjögren, Maria Berghof

  2. For planning • No funding currently available => we cannot promise to participate in the project • Minor participation 2010 (proposal writing, planning, etc. ) • If funding from 2011, participation possible in the intensive field periods

  3. Instruments • DMT CCN counter • SMPS (or DMPS) • For measurements of dry aerosol number size distributions • Home built (to be built) • Planned range: • ~ 3-850 nm (twin), or • ~ 15-850 nm (single) • Planned time resolution: • ~ 5 min

  4. Inlets • Whole air inlet • For usein-cloud • For sampling of bothclouddroplets and interstitialparticles • With dryer • Interstitialinlet • For usein-cloud • For sampling of cloudinterstitalparticles • With dryer

  5. Idea • Use the CCN counter to measure in-cloud effective supersaturation (S) • Connect the CCNC after the interstitial inlet • Scan in S (by scanning the flow; Moore and Nenes, 2009) • At instrument S lower than the ambient S, no CCNs are counted • When the CCNC starts to count particles, the ambient S has been reached • The method will be tested 2010

  6. Ambient in-cloud number size distribution (Great Dun Fell, England, 1995)

  7. Possible configuration

  8. Possible contributions from Lund University, Sweden Cloud measurements Göran Frank, Bengt Martinsson, Staffan Sjögren, Maria Berghof

  9. Instrument • Droplet Aerosol Analyser (DAA)

  10. Droplet Aerosol Analyser (DAA) • Measures • Number size distribution of ambient cloud/fog droplets and interstitial particles at ambient conditions • Number size distribution of dry residual particles • The relation between ambient diameter and dry (residual) diameter on a single droplet/particle basis • 3-dimensional data set

  11. Examples of results 1 (Great Dun Fell, England, 1995)

  12. Examples of results 2 (Great Dun Fell, England, 1995)

  13. Examples of results 3 (Great Dun Fell, England, 1995)

  14. The Droplet Aerosol AnalyserInvented by Bengt Martinsson Drawing by Maria Berghof

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