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Explanations??? Hypotheses??? Speculations??? How good are the data? Potential out-of-cloud effects: Lack of preexisting aerosol? Underestimated vapor pressure of supercooled water? Surface nucleation? Potential in-cloud effects: Control by ice nuclei? Mesoscale temperature fluctuations? Subresolution patchiness? HNO 3 deposition on ice, forming NAT? Intrinsic limitations on growth of ice? Cubic ice? Overpopulated tail of high velocity molecules?
Several slides with unpublished data removed here New results from Pre-AVE campaign Aircraft-balloon intercomparisons European measurements from Geophysica and the German Learjet
Page 1 and 2: The High Supersaturation Puzzle
Page 3 and 4: Saturation ratio with respect to ic
Page 5 and 6: Two questions central to our unders
Page 7 and 8: How do we expect S in a cirrus to d
Page 9 and 10: Jensen et al., Atmos. Chem. Phys.,
Page 11 and 12: Lee et al., JGR, 2004: Measured tem
Page 13 and 14: Increasing stratospheric humidity I
Page 15 and 16: “T hey live for a short tim e in
Page 17 and 18: Atmospheric Application Water Activ
Page 19 and 20: ice saturation ratio S What does th
Page 21 and 22: How does water vapor condense on ic
Page 23 and 24: Steady-state S to a good approximat
Page 25 and 26: Steady-state S in cirrus: tradition
Page 27: Steady-state S in cirrus: tradition
Page 31 and 32: Shilling et al., Vapor Pressure of
Page 33 and 34: Potential out-of-cloud effects: Lac
Page 35 and 36: ice saturation ratio S Potential ou
Page 37 and 38: Potential in-cloud effects: Mesosc
Page 40 and 41: Potential in-cloud effects: HNO 3
Page 42 and 43: ice saturation ratio S Potential in
Page 44 and 45: Summary of Potential Explanations:
Page 46: Summary of Potential Explanations:

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