You are looking at 1-20 of 1,183 entries  for:

  • All: water Vapor x
clear all

Did you mean water vapour water vapour

View:

Overview

water Vapor

The gaseous form of water, present in the atmosphere in varying amounts. It is an intermediate stage in the hydrological cycle. Water vapour in the atmosphere represents 0.01% of the total ...

Water Vapor

Water Vapor   Reference library

Encyclopedia of Climate and Weather (2 ed.)

Reference type:
Subject Reference
Current Version:
2011
Subject:
Science and technology, Earth Sciences and Geography, Social sciences, Environment
Length:
3,391 words
Illustration(s):
4

...vapor pressure over water of a parcel equals the actual vapor pressure of the parcel. • Frost point is the temperature at which the saturation vapor pressure over ice of a parcel equals the actual vapor pressure of the parcel. The choice of measure is based on convenience or habit. Integrated water vapor (or the misleading term total precipitable water ) is the amount of water vapor in a given area integrated over a column that extends the full height of the atmosphere. Total column water includes water in all phases but is usually dominated by water vapor....

Water Vapor

Water Vapor   Reference library

The Oxford Companion to Global Change

Reference type:
Subject Reference
Current Version:
2009

... Vapor Water vapor, the gaseous form of water (H 2 O), is present in the Earth's atmosphere. It plays a central and varied role in the determination of the Earth's climate. Many of the uncertainties in prediction of climate changes—whether they be caused by solar variability or by increase in carbon dioxide (CO 2 )—stem from uncertainties in the modeling of the way water vapor affects climate. Latent Heat The first type of water-vapor effect arises from the energy involved in the phase change between liquid (or solid) water and the vapor state. It takes...

Water Vapor

Water Vapor   Reference library

Encyclopedia of Global Change

Reference type:
Subject Reference
Current Version:
2005

...if water vapor is added to the atmosphere to achieve 50 percent relative humidity, the radiated energy drops to 303 W/m 2 . For 40 percent relative humidity the value is 309 W/m 2 , whereas for 60 percent it is 297 W/m 2 . Because so much of the greenhouse effect is directly due to the presence of water vapor in the atmosphere, climate predictions are sensitive to the way water vapor content changes as the climate is altered. This does not mean that the greenhouse effect of CO 2 and other trace gases is negligible compared to that of water vapor. Water vapor...

water vapour

water vapour   Quick reference

A Dictionary of Construction, Surveying and Civil Engineering (2 ed.)

Reference type:
Subject Reference
Current Version:
2020

... vapour Water in a gaseous...

water vapour

water vapour   Quick reference

A Dictionary of Mechanical Engineering (2 ed.)

Reference type:
Subject Reference
Current Version:
2019

...water vapour The phase of water that can be produced from a body of liquid water by raising its temperature or reducing the pressure, causing water molecules to leave the free surface...

water vapour

water vapour   Quick reference

A Dictionary of Chemical Engineering

Reference type:
Subject Reference
Current Version:
2014

...water vapour The gaseous state of water dispersed with air at a temperature below the boiling point of the water. The amount present in air is designated by the humidity. The relative humidity is the amount of water vapour in a mixture of dry air. A relative humidity of 100 per cent corresponds to the partial pressure of water vapour being equal to the equilibrium vapour pressure, and depends on the temperature and pressure. ...

water vapour

water vapour   Quick reference

A Dictionary of Geology and Earth Sciences (5 ed.)

Reference type:
Subject Reference
Current Version:
2020

... vapour The gaseous form of water, present in the atmosphere in varying amounts. It is an intermediate stage in the hydrologic cycle . Water vapour in the atmosphere represents 0.01% of the total water inventory of the Earth. Water molecules have a short residence time in the atmosphere, on average about nine days, though this varies over a very wide range, from a few minutes upwards. Water enters the atmosphere by evaporation, transpiration, and sublimation at the Earth’s surface. The concentration of water vapour decreases with increasing altitude...

water vapour

water vapour   Quick reference

A Dictionary of Weather (2 ed.)

Reference type:
Subject Reference
Current Version:
2008

...release of latent heat when water vapour condenses into cloud droplets or freezes into ice crystals assists convection , and is an extremely important source of energy in tropical cyclones , thunderstorms , and other systems. It is, for example, responsible for the difference between the saturated adiabatic and dry adiabatic lapse rates . The amount of water vapour in the air is determined with a hygrometer , and is measured in terms of humidity ( see humidity mixing ratio ; relative humidity ; saturation ; vapour pressure ). See also dew...

water vapour

water vapour   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

... vapour Water that has evaporated into the air as an invisible gas (it accounts for up to 5% of air by volume), which is an important part of the water cycle and also the most important greenhouse gas . When it condenses it turns into a liquid state to form cloud , mist , fog , rain , sleet , hail , or snow...

water Vapor

water Vapor  

The gaseous form of water, present in the atmosphere in varying amounts. It is an intermediate stage in the hydrological cycle. Water vapour in the atmosphere represents 0.01% of the total water ...
saturation vapour pressure

saturation vapour pressure  

The vapour pressure at which the layer of air immediately above the surface of liquid water is saturated with moisture at a given temperature.
vapour

vapour  

The gaseous form of a substance that is normally in the solid or liquid state at room temperature and pressure, such as water vapour.
equivalent temperature

equivalent temperature  

The temperature that an air parcel would assume if all the water vapour present were removed by condensation, under conditions of constant pressure, with the latent heat released being used to warm ...
freezing condensation

freezing condensation  

A process that occurs in the clouds in which ice crystals trap water vapour, grow larger and heavier, and begin to fall as rain or snow.
sling psychrometer

sling psychrometer  

An instrument that is used to measure the amount of water vapour in the air, using wet and dry bulb thermometers mounted on a frame.
humidity mixing ratio

humidity mixing ratio  

The ratio of water vapour to the mass of dry air with which it occurs, normally expressed as grams per kilogram. See also specific humidity.
moisture

moisture  

Wetness, for example as water vapour in the atmosphere or as a condensed liquid on the surface of an object.
vapour pressure

vapour pressure  

In meteorology, the pressure exerted by the water vapour in the air. This is a partial pressure since pressure is also exerted by the air itself. Moisture content is commonly measured by relative ...
phase

phase  

One of the three forms in which any matter can exist, as a solid (for water, in the form of tiny ice crystals), a liquid (as droplets of water), or a gas (water vapour). As the matter is converted ...
absolute humidity

absolute humidity  

The amount of water vapour in air, determined as the mass of vapour per unit mass of air, and normally given in grams per cubic metre. See also humidity; specific humidity.

View: