Water vapor is a greenhouse gas, meaning that it absorbs outgoing longwave (IR) radiation and reemits it to the surfac of the Earth. The image at left shows the absorptivity of water vapor with respect to various wavelengths of ultraviolet, visible, and infrared radiation. Low values indicate transparency. For example, to visible light, water vapor is invisible. It is also almost invisible to the IR4 channel, the channel used to generate most IR satellite imagery. However, to wavelengths in the IR3 (water vapor) channel, about 50% of the IR is absorbed.The IR3 channel is used to generate water vapor imagery. Please read the details at the following links:
1 comment:
really??? if the water vapor raised to its peek??? what will happen???
vapor recovery unit
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