What is global circulation? | Part Two | The three cells
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- čas přidán 19. 02. 2018
- Global circulation on our rotating Earth splits the atmosphere into three cells in each hemisphere: the Hadley cell, Ferrel cell and Polar cell. In this video, we look at how air moves around each cell and how this controls the location of the world’s deserts and rainforests.
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I'm in an ecology class and these videos are insanely helpful, thank you!
Really helped with my revision for mocks. Clear explanations and diagrams helped me understand the concept well. Thank you!
@@parampramodh6237 LMAOOO
Highly visual, very pedagogic. Excellent.
I missed this video in class cause the music made me fall asleep, happened again rewatching it at home XD
Fantastic video. It helped me much more than my set coursebook on the subject. Simple and clear, with easy to follow illustrations.
The animation and background music remind me of Mario Galaxy
oddly easy to understand. good job.
I like the animation and explanation. This was so simple and key information. You Rock!!!!!
Met office for you
Brilliant, thank you!
Fascinating great video
I love this video thanks for sharing it. :)
Thank you very much! So well done and easy to understand.
It's so simple but very explanatory
Thank you❤️
From Sri Lanka 🇱🇰😍
Love these videos!
Masterpiece
Watching purely out of curiosity and worldbuilding. Very informative
good luck with gcses tomorrow
Best vid by far!
(Artifecian says of things that are a little different.)
So much easier to understand now
there is no "purpose" in physics. it just behaves according to the laws of physics.
besides that minor point, amazingly concise and in-depth explanation!
thank you so much!
cool, it becomes much clearer
Love your accent...it makes me remember stuff because of how l mimic you when you talk
Thank you
Very good explanation. Thanks
uwu
Thank u for the tutorial
Hadley cell- is the largest cell and the warmer less dense air rises and contains all of the weather
Polar cells- if air leaces the polar cells it starts to warm and rise. They are the smallest cells
Ferrell cells- in the opposite direction and is not a weather cell, it gives us our regions
ok... i love you?
Very informative and straight to the point.
Thanks for the great explanation. One question: If earth rotates much faster, there would be another cell? Like 4 cells on northern hemisphere?
mmmmm covid school time :)
how about the trade winds?
I watched this in geography but forgot it, so I came back
Explains it wayyyy better than the faa
Hey 🙂
First of all, thank very much for your posts and very informative materials.
I got a question that it would be amazing if you Know any link , webside to Know the answer.
- How are the hadley, ferrel and polar cells formed?
On your videos explain how the air circulates around them and the direction of the winds and jet streams due the Coriolis apparent force but how have these cells been formed and why are there 3 cells instead of 2 or 4 ?
Thank you very much .
Hope you understood my question 🙂
Hi, this is quite late on but here I go. Taken from a document I wrote on meteorology because I love it ;)
As the earth is a sphere, the equator is going to always be closest to the sun, meaning it takes a shorter amount for a time the UV rays to be absorbed than somewhere on a higher latitude. That’s basically why the poles are very cold and why equator is very hot. At the equator, lots of UV rays are absorbed into the ground. This heats up the surrounding air and water. As the air is very hot, it will rise because it is less dense than the surrounding air. As the air is rising, the temperature will decreases because the air is thinner (the air can hold less heat); once the air temperature reaches the dewpoint temperature, the temperature at which water vapour condenses, the air will condense and forms clouds. The tiny water droplets, inside the clouds, are suspended in the air because they have clung onto small particles of dust or dirt, which is why clouds are visible. (The dirt is NOT why some clouds are darker, that’s because the cloud is denser so less sunlight can pass through it). Once the cloud becomes supersaturated (can’t hold any more water), precipitation falls as rain. As there is so much energy, most of these clouds are cumulonimbus types, which produce immense amounts of rainfall and thunderstorms. Plus, this is why the humidity is so high because there is so much moisture in the air. This cycle will continue creating a semi-permeable area of low pressure at the equator, which forms a tropical climate. Once the air has lost its moisture it is pulled to a lower density area, which is the poles. This air then instead of being pulled along, starts to sink. This sinking air creates a semi-permeable area of high pressure around 30°N. And the first cell. The distance between the equator and 30°N is roughly the size of the Hadley cell. Remember all the cells are mirrored on the southern hemisphere so another area of high pressure would be created at 30°S as well as a second Hadley cell.
@@Jet2Guy I know this was posted a long time ago but I'm trying to find out what drives the lattitude of the high pressure areas for a worldbuilding project. Specifically, I'm looking to find out how atmospheric density and gravity would effect the lattitude of the high pressures (rotation too). If you are able to answer or point me in the right direction I would be very grateful, thanks
@@zac_walton wdym
i love the earth
👍 perfect
Can anyone help me answer this? I cant find it anywhere.
Global Wind Oscillation describes
a. the sea surface temperature anomalies near the west coast of South America.
b. whether the winds are net easterly or net westerly.
c. the sea surface temperature anomalies near the west coast of North America.
d. how strong the Icelandic low and Azores high are.
e. a region of thunderstorms circumnavigating the Earth in the tropics.
pov u have to watch this for online school :(
Agreed
should add temperate rain forests of Washington and BC. yes mountains but still there are many different kinds of rain forests that would help explain your point not just tropical
The color of the Ferrel cells is incorrect. Hot (red) air rises at 60 degrees latitude (along with the polar cell), moves towards 30 degrees latitude while it cools down, and is (should be) cool (blue) when it falls.
my teacher made us manually type in this youtube link and it took us all so long
Omg same
thats cold lol
i just clicked the link on the powerpoint but nobody else knew you could do that lmao
1:08 i've never heard someone speak of weather being "contained" before
👍👍
0:22 Why would we get a single cell in each hemisphere? If the earth was tidally locked, wouldn't we get many cells that point towards the "sun-pole" from every angle?
I have a question what is prevailing winds?
It's the main and permanent direction that winds will come from
@@stephensnell1379 Average wind direction*
@@Robert-fs9tw Uhh no prevailing winds are the winds that blow between the pressure belts
Yo bb
Lmao
Top for A2 CAIE Geography thanks
When you look at a temperature map of Africa, the Sahara desert is warmer in averaged than the tropical rainforest. Should't the Hadley cell be in the opposite direction in Africa ?
I am confused. I thought air moves from high to low pressure. Why are the areas where air is descending the high pressure zones?
Think of it this way - low pressure areas are those that are the warmest. Air heats up and rises, creating an area of low pressure. So low pressure - air is always ascending. Now, think of the opposite. Areas where temperatures are cooler, have descending air. Air cools down and sinks to the surface. So cool temperatures - descending air - high pressure. Hope that helps!
@@vandanahegde9221 nope
@@sz7432 care to explain, then?
High/low pressure zones refer to the pressure at the surface. So the pressure at the surface where the air descends (about 30 degrees from the poles) is higher than the pressure at the surface at the equator.
Warm air has upward bulged isobars, which means that the air pressure in a column of warm air decreases slowly vertically, in comparison with a column of cold air, where air pressure decreases fast in the vertical (compressed isobars).
Therefore, above warm air (the Equator for ex) forms an area of higher pressure, compared to the pressure above colder air (30*-40* latitude for example). So yes, air moves from high to low pressure, but this time at higher levels. (The opposite airflow forms over the surface due to obvious reasons)
i don't get why the hotter, less dense air is the one to move to a high pressure zone instead of the opposite, could someone shine a light here?
where is part one
0:52 hadley cells
Who else has a geog test tom 😎
ive an exam tom about this topic but not geology though, on my part it's meteorology.. Goodluck then
Why does the warm air flow toward the poles tho ?
Amanda O because hot air is less dense so it would rise in latitude whereas the cold denser air sinks
Hafsah Najam oh so they switch spots kind of ? Air rises and cold air fills its spot ? Thanks !!
warm moves toward cold. that simple. warmth is energy, thus it moves toward areas of cold (less energy) to try to reach equilibrium
cis of the kennel cells
Great annimation, but your depiction of the great victoria desert in Australia is very wrong.
I don’t think it is considering this is the met office, the biggest weather company in the uk
u never explained how the other cells were driven by temperature?
I’m only here for my science class
Only Low Pressure gives rainfall High Pressure does not give any at all
Who else got Geo tomorrow 😂
Anybody else here studying for their ATPL's ?
Hi
who's here in 2020
bestie not all of Australia is desert
What’s popping
🥺🥺🥺🏳️🌈🏳️🌈🏳️🌈🏳️🌈
came here because my online classes explanation sucked
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Heeeeeeeeeeeelp Lussi Globallll Home nedetd Home
Any Indian here... upsc
Can you elaborate on the statement being said here 'UK having relatively wet climate'.
@@achus9519 no
Interesting how Antartica is a desert!
Lussi no hawe so by how fly USA Am Home Heeeeeeelp !!!!!!!
Is that English? I like it, I don't understand you, but it sounds funny in my head
Upper ferrel cell winds dont go north to south. This is proved to be wrong. Because of the troposhpere is descending equator to north air cant go up. This is impossible. All upper winds go equator to poles
ฟังไม่รู้เรื่องครับ
ty i cant with 7th grade
this is soo confusing
I mean I’m doing this with a note sheet. Can you please go slower? You’re not frigging sonic the hedge hog.
Benjamin Marrero Alicea yes.
shut up tree face i love the earth
i love the earth