ice nucleation characteristics of asian and saharan desert dust

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Field P.R., Moehler O., Connolly P., Kraemer M., Cotton R., Heymsfield A.J., Schnaiter M. Ice nucleation characteristics of Asian and Saharan desert dust. Saharan dust sample — desert close to Cairo, Egypt (SD2). Asian dust sample —Takla Makan desert, China (AD1). - PowerPoint PPT Presentation

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  • Ice nucleation characteristics of Asian and Saharan desert dustField P.R., Moehler O., Connolly P., Kraemer M., Cotton R., Heymsfield A.J., Schnaiter M.

  • Saharan dust sampledesert close to Cairo, Egypt (SD2)Asian dust sampleTakla Makan desert, China (AD1)Temperature range: -20 to -50C

  • SID sizeSID concSID AfSi, SwT, P-50-580.41.01.61101000.110110100

  • SID sizeSID concSID AfSi, SwT, P-34-461101001101000.41.01.60.110

  • 0.41.01.40.110SID sizeSID concSID AfSi, SwT, P-22-34110100110100

  • 1.01.21.41.6Critical ice saturation ratio-60-40-20Critical Temperature [oC]

  • -60-40-20Critical Temperature [oC]1.00.10.01Ice nucleation efficiency

  • ConclusionsNo deposition nucleation for T>-35CT>-30C: Efficiency ~1%T10%Repeated nucleation decreases critical ice saturation req'd for deposition nucleation

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