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Liquid water path - in units of () is a measure of the total amount of liquid water present between two points in the atmosphere.〔(【引用サイトリンク】 url = http://education.arm.gov/nsdl/Library/glossary.shtml#anchorL )〕 LWP is an important quantity in understanding radiative transfer in the atmosphere. It is defined as the integral of liquid water content between two points in the atmosphere. For nadir observations and whole atmospheric column we have : where is the liquid water mixing ratio and is the density of air (including water loading).〔(【引用サイトリンク】 url = http://amsglossary.allenpress.com/glossary/search?p=1&query=liquid+water+path&submit=Search )〕 The atmosphere is in approximate hydrostatic equilibrium and hydrostatic equation for atmospheric pressure is given by : which gives : where is gravitational acceleration, is the pressure increment between two layers in the atmosphere and integration is between surface and top of the atmosphere. Liquid water path can also be defined between any two selected points. The liquid water path can be approximately retrieved from passive and active remote sensing such as microwave radiometer instruments, for example SSM/I. Typical values of liquid water path in marine stratocumulus can be of the order of 20-80 (). ==See also== *Liquid water content 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Liquid water path」の詳細全文を読む スポンサード リンク
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