Greenhouse Effect and Global Warming

Greenhouse Effect and Global Warming
Greenhouse effect
 As the sun’s rays enter our atmosphere, the Earth’s surface absorbs light energy from the sun and emits it as heat energy.
 About 31 % of the incoming radiation from the sun is reflected directly back to space by the earth's atmosphere.
 Another 20 % is absorbed by the atmosphere. The rest of the incoming radiation is absorbed by the earth's oceans and land, where it is converted into heat, warming the surface of the earth and the air above it.
 However, several gases in Earth’s atmosphere - such as carbon dioxide, methane and water vapor work like a blanket over the earth’s surface to retain much of this heat from escaping to outer space. That helps to warm our earth’s atmosphere. The gases do this by absorbing the heat and radiating it back to Earth’s surface. Such gases are called “greenhouse gases” because of their heat-trapping effect.
 The phenomenon wherein the earth’s atmosphere trap the heat from the sun and retain it from escaping into outer space and increasing the earth’s surface temperature is called “Greenhouse effect”. Without this greenhouse effect, Earth would be too cold to support most forms of life.
Global Warming
 Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide, methane , nitrous oxide and water vapor which trap radiated heat that would otherwise escape from Earth into the outer space.
Concept of Greenhouse
You might have seen in botanical garden plant growers growing plant in green houses.
Lets us try to understand the concept of growing plants in green houses.
 The most basic greenhouse would be a simple transparent structure, preferably made up of glass or transparent plastic.
 When the radiations of sunlight enter through the transparent walls of the greenhouse, it heats up the floor of the greenhouse.
 The floor releases some of this thermal energy, which heats the layer of air at the bottom of the greenhouse.
 Warmer air is lighter than cooler air, so the heated air rises to the top of the greenhouse. When the heated air rises, cooler air replaces it at the bottom of the greenhouse. This air becomes heated by the floor and also begins to rise.
 This circulation of air helps keep greenhouse warmer than outside atmosphere.
 Hence, greenhouses are useful for growing plants in cold climatic condition.
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[@sumathiisaac496]

Nice explanation

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Keep watching...thanks

[@samlair3342]

Ironically, the quantum mechanics of the greenhouse effect is comparatively straight forward compared to the complexities of global warming induced climate change. The keystone for understanding both is understanding that greenhouse gases readily absorb ‘infrared energy’ (heat) while nitrogen and oxygen do not. Absorption of such radiant energy causes molecules such as carbon dioxide to gyrate wildly and vigorously bump into neighboring molecules, thus causing them to ricochet off of other surrounding molecules that, in turn, bump into other molecules which bump into more, etcetera, etcetera. This energy of physical motion represents ‘kinetic energy’ - the measure of which is temperature, the unified energy field of kinetic energy (physical particle action) and radiant energy (electromagnetic wave action).

[@PoojaKumari20]

Nice explanation

[@scienceprojects7130]

Thanks for liking

[@ravindrakumarsinghal432]

🌹👌This is a very clear detailed basic information of the topic, not explained in most of the uploaded videos. THANKS. 👌🌹

[@scienceprojects7130]

So nice of you

[@paulwolf8444]

The equations work for a black planet model but not for the gray planet model, which is what we have.

[@irlandazurialvarez6514]

I’m from Mexico and I live on Mexico, I doesn’t speak very well the English and I doesn’t understand this.
Sorry 😞

[@Narayani6604]

Rosary se sec school.
Radio colony Delhi
110009

[@sunderpreetsaini]

REALLY AWESOME.VERY VERY GOOD FOR SCIENCE TEACHERS.

[@scienceprojects7130]

Thanks a lot

[@cuttingthroughthenoise3086]

I have a new video explaining this MUCH better: ruclips.net/video/epjvWmzXrRo/видео.html

[@lorenzlandero3842]

Shout out Gilbert

[@Narayani6604]

Our mam put videos from this channel only

[@miked5106]

not a very sophisticated explanation.

[@scienceprojects7130]

it is as per class 6th grade

[@benjasalto4421]

As the sun rays enter our atmosphere, earrth surface absorb ebergy and ists emiited
Some of the incoming radiation its reflected to the atmosphere (31%)
Another 20% is absorb bu the atmosphere and the rest is absorb by the earths surface and land as heat.
Some gases on the atmosphere work like blankrt over to retain much of the heat

[@Narayani6604]

Dhara katwara mam
Science teacher
Rosary se sec school.
Radio colony Delhi
110009

[@nutri_trends]

Good explanation 👍

[@scienceprojects7130]

Glad you liked it!

[@iwanthavithanage9153]

Really awesome 👍

[@scienceprojects7130]

Thank you! Cheers!

[@grindupBaker]

The "Greenhouse Effect" can be explained simply to just about anybody by losing the gas fixation, like this:
- Earth's troposphere gets cooler with altitude (average 78 degrees colder at top than surface) because most sunshine reaches the surface.
- Colder things radiate less than warmer things.
The top 0.01 mm of any water surface and the top far less than 0.01 mm of land and objects radiate upwards, but there's also some water, ice, dust, salt, ash and other solids in the troposphere and they absorb some radiation emitted up from the very same stuff below at the surface. These water, ice, dust, salt, ash and other solids in the troposphere also radiate upwards (of course) just like the exact same things did below them, but they emit LESS upwards because they're colder because they're higher than the surface. So now less radiation gets to space and that's the "Greenhouse Effect" in Earth's troposphere (for example, it makes cloudy winter nights cool slower than clear winter nights). There's also some gases that can do that like H2O, CO2, CH4, O3, N2O, CFCs and they're called "infrared-active" or "greenhouse" (not nitrogen, oxygen or argon though). The more solids or liquids or infrared-active gases there are in the troposphere then provided they can mix well to the top the more it'll reduce Earth's cooling to space and try to make Earth warmer.
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However, the water, ice, dust, salt, ash and other solids in the troposphere also reflect some sunshine and it's a bigger effect than their "Greenhouse Effect" so overall the more solids or liquids there are in the troposphere the cooler Earth gets. The infrared-active gases like H2O, CO2, CH4, O3, N2O, CFCs don't reflect any sunshine so overall the more "greenhouse gases (GHGs)" there are in the troposphere the warmer Earth gets.

[@Narayani6604]

Best Chanel

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Great to hear!.. Please watch our more videos