Humidity Humidity Humidity is the amount of water vapour present in air. Water vapour, the gaseous state of water, is generally invisible to the human eye. Humidity indicates the likelihood for precipitation, dew, or fog to be present. The amount of water vapour needed to achieve saturation increases as the temperature increases. As the temperature of a parcel of air decreases it will eventually reach the saturation point without adding or losing water mass. The amount of water vapour contained within a parcel of air can vary significantly. For example, a parcel of air near saturation may contain 28 grams of
Vapour Col Vapour Col Vapour Col is a col lying south of Stonethrow Ridge on the west side of Deception Island in the South Shetland Islands of Antarctica. The name given by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1959 originates from the fumaroles in the col. This is the only locality on Deception Island where there is a complete cross section through the stratigraphy of volcanic succession. A 148 tract of ice-free land rising steeply from the south-western shore of Deception Island to 340 m, and including Vapour Col, has been identified an Important Bird Area (IBA) by BirdLife International