What is precipitation and how they are distributed across our planet

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2018-03-26 17:20:10

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Perhaps even child can tell what is atmospheric precipitation. Rain, snow, hail… the Fact is that the moisture that falls from the sky to the ground. However, not all can clearly tell where this water comes from. It is clear that from the clouds (although it isn't a hard and fast rule), but where in the sky have clouds? To understand the cause and nature of the place above our heads, showers, rain and snowfall, you need to get an idea about the exchange of the h-two-o on the planet Earth.

Atmospheric precipitation

From the surface of the oceans and seas under the influence of the sun evaporates water. Invisible vapor rises where going up into the clouds and the clouds. The wind carries them to the continents, where they fall precipitation. Heavenly moisture falling to the ground, in rivers and lakes, seeps into the groundwater feeding springs. In turn, numerous streams, rivers and large streams that drain into seas and oceans. Thus the hydrologic cycle of the Earth – a constant circulation of water in its different physical States: vapor, liquid and solid.

Is Erroneous to assume that precipitation must fall from the sky. In some cases they act on objects, like dew, hoarfrost or rime and even rise upward like mist. This is due to the condensation of steam in a cool, saturated with moisture the air. If the pond is warmer than the air over them, evaporating the H2O molecule immediately congenerous-form fog or clouds that bring rain. If the sea is colder than air, the process is reversed: the ice masses of water like a sponge to absorb moisture from the air, draining it.

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Solid precipitation

This explains the fact that atmospheric precipitation falls on Earth unevenly. The warm Gulf stream carries the heated streams from the Caribbean to lie in the far North of Iceland. Falling into cold air, moisture strongly stands out and forms a cloud, thereby forming a Maritime climate of Western Europe. And West coasts of Africa, Australia and South America occurs the opposite process: cold current of dry tropical air masses and form the desert, for example, the Namib.

rainfallThe Average rainfall on the planet – approximately 1000 mm per year, but there are regions where moisture drops out much more, and there are places where rains happen every year. So, deserts receive less than 50 mm in 365 days and record the abundance of heavenly moisture is Cherrapunji in India, which is located on the windward slopes of the Himalayas at a height of over one km above sea level – there the annual rainfall of 12 thousand millimeters in one square meter. In some places, precipitation is unevenly distributed with the seasons. For example, in the subequatorial climate, there are only two seasons: dry and wet. In the Northern hemisphere from November to may is a bucket, whereas in the remaining 6 months are showers. In the dry period there are only 7 % annual rate.

How to measure the number of dropped heavenly moisture? For this purpose, meteorological stations, there are special devices – osgcamera and pluviograph. This bowl is the size of 1 square meter, which drops all the heavenly moisture, including solid precipitation-snow, newly-fallen snow, hail, sleet, and ice needles. Special bumpers prevent the blowing and enhanced evaporation of falling into the bowl of water. Sensors record the height of the accumulated precipitation: during one shower, the day, month and year. To calculate the moisture level of large areas using the method of radar.


Article in other languages:

AR: https://www.tostpost.com/ar/education/2111-what-is-precipitation-and-how-they-are-distributed-across-our-planet.html

BE: https://www.tostpost.com/be/adukacyya/3712-shto-takoe-atmasfernyya-apadk-yak-yany-razmyarko-vayucca-pa-nashay-pla.html

DE: https://www.tostpost.com/de/bildung/3710-was-ist-niederschl-ge-und-wie-sie-verteilt-sind-auf-unserem-planeten.html

ES: https://www.tostpost.com/es/la-educaci-n/3715-qu-es-la-lluvia-y-su-distribuci-n-en-el-planeta.html

HI: https://www.tostpost.com/hi/education/2111-what-is-precipitation-and-how-they-are-distributed-across-our-planet.html

JA: https://www.tostpost.com/ja/education/2110-what-is-precipitation-and-how-they-are-distributed-across-our-planet.html

KK: https://www.tostpost.com/kk/b-l-m/3713-b-l-atmosferaly-zhauyn-shashyn-zh-ne-olar-alay-b-l-ned-zh-ne-b-zd-plan.html

PL: https://www.tostpost.com/pl/edukacja/3716-co-to-opady-i-jak-s-one-rozmieszczone-na-naszej-planecie.html

PT: https://www.tostpost.com/pt/educa-o/3713-o-que-a-chuva-e-como-eles-est-o-distribu-dos-em-nosso-planeta.html

TR: https://www.tostpost.com/tr/e-itim/3718-nedir-atmosferik-ya-ve-nas-l-da-t-l-r-bizim-gezegen.html

UK: https://www.tostpost.com/uk/osv-ta/3715-scho-take-atmosfern-opadi-yak-voni-rozpod-lyayut-sya-po-nash-y-planet.html

ZH: https://www.tostpost.com/zh/education/2276-what-is-precipitation-and-how-they-are-distributed-across-our-planet.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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