From a bad hair day to a
tragic natural disaster,
wind can be a formidable foe.
"Let's just stay ahead of the wind."
But what if this powerful force
just didn’t exist?
Mild temperatures,
pollination,
long-awaited rain in dry regions,
you can thank the wind for these things.
A clear day in a polluted city?
Yup, also the wind.
It also helps create our weather patterns
and diverse ecosystems.
Without it,
Earth would be an otherworldly, alien planet.
I hope you're a fan of weather,
cause we're going to blow your mind.
Wind is a side effect of the uneven
heating of Earth.
It takes much longer for the Sun
to heat the sea than land.
This means that the air above the sea
has a low pressure while
the air above land has high pressure.
The contrast of these opposing air pressures
causes diffusion to occur.
Diffusion is when something with
high concentration moves into something
with low concentration to balance things out.
It’s the same principle that causes
ice to melt in your drink.
For weather, the effect causes
the different air pressures to rush together,
and this is what creates wind.
Wind and weather patterns are also
affected by the rotation of the Earth.
It's called the Coriolis effect,
and it makes storms swirl clockwise
in the southern hemisphere and counterclockwise in the northern hemisphere.
Why?
Each day, the Earth makes one full rotation.
But because of the shape of the Earth,
different points move at different speeds.
The equator is the widest part of the Earth,
which means a coordinate point at the equator
has a longer distance to travel
than a coordinate point in the north and south poles.
And it's a pretty large difference.
Let's take this point here,
it travels 1,600 kph (1,000 mph) to complete a full rotation.
But if we take a point near the poles,
it only needs to travel at .00008 kph (.00005 mph)
or 2 meters per second.
This is why air currents bend to the right in the northern hemisphere
and to the left in the southern hemisphere.
The Coriolis effect is how wind brings
warm weather from the equator to the North and South Poles.
And this is very important,
because without this dispersal of temperature,
we’d be in trouble.
Absent a gentle breeze or mighty gale
to circulate both warm and cold weather around the Earth,
the planet would become a land of extremes.
Areas around the equator would become intensely hot
and the poles would freeze solid.
Entire ecosystems would change,
and some would completely disappear.
But it’s not just temperature that the wind blows around.
It also carries rain clouds.
Land not directly next to bodies of water
would dry up and become deserts.
While land close to water
would probably be very wet places,
with many rainy days.
Because of these extremes,
hot and cold,
dry and wet,
we’d see mass migration of people
fleeing the uninhabitable equator
and poles to the moderate, in-between places.
This would cause a lot of population strain
for locations like the northern U.S.,
southern Canada,
and southern Europe.
If that wasn’t enough,
ocean currents would be severely impacted by a lack of wind,
which would further change weather patterns.
The good news?
We wouldn’t have any hurricanes.
These are costly.
and cost the United States $125 billion.
So we may not have to budget for hurricanes anymore,
but we’d still need to spend that money, or more,
just to survive in a windless world.
For one thing, we’d have to create massive irrigation structures
to transport water from rain-soaked coastal areas
to sunny, but dry farmland.
Even with irrigation,
we would struggle to produce
enough food and famine
would spread across the globe.
But don’t worry,
you’d still be able to hop on a plane for travel.
While planes use wind in flight,
they don’t need it.
Wind simply helps them get airborne faster.
Without it,
they’d just need to burn more fuel
to reach the speeds needed for lift off.
Wind is important to our atmosphere
and is often taken for granted.
It's a case of out of sight, out of mind.
Not only does it provide a cool breeze during a hot day,
it also creates our cherished ecosystems.
No wind?
There wouldn’t even be the Amazon rainforest.
And since the Amazon produces 25%
of the world’s oxygen,
it would be bad news for us if we lost it.
But that's a story for another What If.