water Vapor

'water Vapor' can also refer to...

Water Vapor

Water Vapor

Water Vapor

FTS Measurements of Submillimeter-Wave Atmospheric Opacity at Pampa la Bola: III. Water Vapor, Liquid Water, and 183 GHz Water Vapor Line Opacities

Water-Vapor Maser Survey for Active Galactic Nuclei: A Megamaser in NGC 6926

Water-Vapor Maser Disk at the Nucleus of the Seyfert 2 Galaxy NGC 3079

Detection of a Water-Vapor Megamaser in the Active Galaxy NGC 5793

Palp-Splaying Behavior and a Specific Mouthpart Site Associated with Active Water Vapor Uptake in Amblyomma americanum (Acari: Ixodidae)

Determination of embryonic temperature profiles and eggshell water vapor conductance constants in incubating Ross × Ross 708 broiler hatching eggs using temperature transponders1 2

Water-Vapor Maser Disk at the Nucleus of the Seyfert 2 Galaxy IC 2560 and its Distance

Water-Vapor Maser Emission from the Seyfert 2 Galaxy IC 2560: Evidence for a Super-Massive Black Hole

Modeling intra-crown and intra-canopy interactions in red maple: assessment of light transfer on carbon dioxide and water vapor exchange

Variation in surface conductance to water vapor diffusion in peach fruit and its effects on fruit growth assessed by a simulation model

Carbon dioxide and water vapor exchange by young and old ponderosa pine ecosystems during a dry summer

Regulation of branch-level gas exchange of boreal trees: roles of shoot water potential and vapor pressure difference

Shoot water relations of mature black spruce families displaying a genotype × environment interaction in growth rate. III. Diurnal patterns as influenced by vapor pressure deficit and internal water status

Simulating nectarine tree transpiration and dynamic water storage from responses of leaf conductance to light and sap flow to stem water potential and vapor pressure deficit

Use of implantable temperature transponders for the determination of air cell temperature, eggshell water vapor conductance, and their functional relationships in embryonated broiler hatching eggs 1 2

Land-use changes alter radiative energy and water vapor fluxes of a tall-grass Andropogon field and a savanna–woodland continuum in the Orinoco lowlands


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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 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 up to over 20 km, where some increase may occur. Measures of water-vapour concentration include vapour pressure, the humidity mixing ratio, and the absolute and relative humidity. The physical significance of water vapour in the atmosphere is in its condensation to produce cloud and precipitation (with release of latent heat of condensation, which often accelerates the uplift of rising air), its absorption and scattering of radiation, etc.

Subjects: Meteorology and Climatology.

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