water vapor-water vapor

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原创，时间：2022-12-18 14:11:06

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关于water vapor内容导航：

• 1、water vapor
• 2、water vapor
• 3、water vapor

1、water vapor

2、water vapor

百度翻译为（参考）：

water-vapor-column
水蒸气柱

3、water vapor

The sun shines and the water in the river become vapour.The vapour goes up.It goes higher and higher.It meets mang other vapour.They go up together and become a cloud. The cloud become very heavy. The rain falls from the clouds.


The water cycle has no starting point. But, we'll begin in the oceans, since that is where most of Earth's water exists. The sun, which drives the water cycle, heats water in the oceans. Some of it evaporates as vapor into the air. Ice and snow can sublimate directly into water vapor. Rising air currents take the vapor up into the atmosphere, along with water from evapotranspiration, which is water transpired from plants and evaporated from the soil. The vapor rises into the air where cooler temperatures cause it to condense into clouds. Air currents move clouds around the globe, cloud particles collide, grow, and fall out of the sky as precipitation. Some precipitation falls as snow and can accumulate as ice caps and glaciers, which can store frozen water for thousands of years. Snowpacks in warmer climates often thaw and melt when spring arrives, and the melted water flows overland as snowmelt.

Most precipitation falls back into the oceans or onto land, where, due to gravity, the precipitation flows over the ground as surface runoff. A portion of runoff enters rivers in valleys in the landscape, with streamflow moving water towards the oceans. Runoff, and ground-water seepage, accumulate and are stored as freshwater in lakes. Not all runoff flows into rivers, though. Much of it soaks into the ground as infiltration. Some water infiltrates deep into the ground and replenishes aquifers (saturated subsurface rock), which store huge amounts of freshwater for long periods of time. Some infiltration stays close to the land surface and can seep back into surface-water bodies (and the ocean) as groundwater discharge, and some ground water finds openings in the land surface and emerges as freshwater springs. Over time, though, all of this water keeps moving, some to reenter the ocean, where the water cycle "ends" ... oops - I mean, where it "begins."
一、 rain is liquid precipitation, as opposed to other kinds of precipitation such as snow, hail and sleet. rain requires the presence of a thick layer of the atmosphere to have temperatures above the melting point of water near and above the earth's surface. on earth, it is the condensation of atmospheric water vapor into drops of water heavy enough to fall, often making it to the surface. two processes, possibly acting together, can lead to air becoming saturated leading to rainfall: cooling the air or adding water vapour to the air. virga is precipitation that begins falling to the earth but evaporates before reaching the surface; it is one of the ways air can become saturated. precipitation forms via collision with other rain drops or ice crystals within a cloud. rain drops range in size from oblate, pancake-like shapes for larger drops, to small spheres for smaller drops. 二、 rain plays a role in the hydrologic cycle in which moisture from the oceans evaporates, condenses into drops, precipitates (falls) from the sky, and eventually returns to the ocean via rivers and streams to repeat the cycle again. the water vapor from plant respiration also contributes to the moisture in the atmosphere. a scientific model known as the bergeron process explains how rain forms and falls. >> the bergeron–findeisen process (after tor bergeron and w. findeisen), also known as the cold rain or ice crystal process, is the formation of precipitation in the cold clouds of the mid and upper latitudes by ice crystal growth. the equilibrium vapor pressure over water is greater than the saturation vapor pressure over ice, at the same temperature. therefore in a mixed phase cloud, the liquid water will be out of vapor pressure equilibrium and will evaporate to reach equilibrium. the water droplets will move toward the lower pressure over the ice and diffuse onto the ice crystals. the vapor will be condensed and freeze onto the ice crystal, causing it to grow larger.

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