Abstract
The growth of the ice phase in cirrus uncinus and cirrostratus clouds was studied through aircraft measurement of cloud particle spectra at different altitudes. Five different cirrus uncinus clouds were studied; one of the cirrus uncinus evolved into cirrostratus. The temperature range of sampling was minus 19 to minus 58 degree C. In cirrus uncinus heads, crystals were determined to be nucleated and grown in the upshear region, before being carried into the trail region of the head downshear as a result of wind shear. The cirrostratus clouds sampled had their nucleation regions near the top of the clouds; crystals sedimented and grew from this source region near the top to near the base, and then evaporated to the base.
| Original language | English |
|---|---|
| Pages (from-to) | 799-808 |
| Number of pages | 10 |
| Journal | Journal of the Atmospheric Sciences |
| Volume | 32 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1975 |