A thistle head covered in frost. Frost is similar to dew, but forms at temperatures below freezing. Water vapor is transformed directly into ice crystals without ever taking the form of water droplets. This process is called sublimation.
Thistle head with frost (DI02397)
2007-02-22
Carlye Calvin
University Corporation for Atmospheric Research (UCAR)
image
Nature
NCAR/UCAR Image and Multimedia Gallery
Copyright University Corporation for Atmospheric Research (UCAR). By [insert name of photographer when listed], licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License, via OpenSky. For commercial use contact copyright@ucar.edu.
DI02397
http://n2t.net/ark:/85065/d70k26r3
