Definition: Icp is an abbreviation for "incredibly cold pressure". It's used to describe the temperature where there isn't enough atmospheric moisture or heat available to bring things down from the atmosphere. The term was introduced by Paul Kuhlen (1970) in his article on "Hypothermia and Incredibly Cold Pressure" in the Journal of Climate. Icp is often associated with extreme cold conditions, particularly in polar regions and during high-altitude weather patterns. It's also used as a descriptive term for periods where temperatures drop significantly below freezing or below atmospheric saturation. The word "icp" was later abbreviated to ICp, which stands for Incredibly Cold Pressure. This concept is crucial for understanding the conditions of extreme cold weather and its effects on life forms living in such environments.