Forget ocean levels rising due to global warming what if

In summary, Dave points out that the map on the website "When the Earth Stops Spinning" is not accurate and does not accurately depict what would happen if Earth stopped spinning. He goes on to say that the map is from a "Strange Maps" website and has no scientific value. He also points out that Venus rotates in reverse, which is an indication of some cataclysmic event.
  • #1
DaveC426913
Gold Member
22,443
6,109
...Earth stopped rotating?

Most of North America would be swamped under poleward rushing oceans.

A whimsical but cool look at an Earth stopped in its tracks...

map.jpg


From http://bigthink.com/ideas/21768".
 
Last edited by a moderator:
Earth sciences news on Phys.org
  • #2
Thank god for angular momentum.
 
  • #3
Thanks, Dave, for the link.
 
  • #4
D'uh, what about the tide ??
 
  • #5
Nik_2213 said:
D'uh, what about the tide ??

What about it? Thoughts?
 
  • #6
Do we stop too, or do I need to get carbon fiber underwear for the 1600 KPH skid?
 
  • #7
Jim1138 said:
Do we stop too, or do I need to get carbon fiber underwear for the 1600 KPH skid?

Heh. Well we can pretend that Earth come to a gentle stop. The oceans still rush poleward.
 
  • #8
As usual for programs like this, it was long on doom and gloom, and short on science.

The whole atmospheric model is ridiculous.

While some atmosphere might initially be drawn from the equatorial regions, the resulting heating would draw it back into the familiar convection loop.

Likewise, the idea of a dry desert mid-band completely ignores what happens when moisture laden winds from the poles crosses the land and drops its load.

While the Coriolis Effect gives us west to east winds in the Northern hemisphere, it is not the primary driver of our climate or H2O distribution, convection is, and this convection would not only continue, but intensify bringing monsoon like conditions to some areas.

I suppose when we have an ignorant populace, it is easy to produce rubbish like this, much like the ridiculous idea that a slight increase in a trace atmospheric gas like CO2 would actually have a significant impact on our climate.
 
  • #9
chazzone said:
As usual for programs like this, it was long on doom and gloom, and short on science.
What program?

chazzone said:
I suppose when we have an ignorant populace, it is easy to produce rubbish like this...

What rubbish?
 
  • #10
Sorry, I was referring the the "Aftermath" program, "When the Earth Stops Spinning".
That's where I originally saw this map, and it all came flooding back, like a bad dream.
Watch it here:
 
Last edited by a moderator:
  • #11
chazzone said:
Sorry, I was referring the the "Aftermath" program, "When the Earth Stops Spinning".
That's where I originally saw this map, and it all came flooding back, like a bad dream.
Watch it here:


Haha no I don't need to; I'd probably want to take a shower afterwards.

No, this map is not meant to promote any science; it is just from a "Strange Maps" site. I had no idea the map itself might have any kind of sordid history...
 
Last edited by a moderator:
  • #12
Well slow stop or not, the rotational kinetic energy has go somewhere:

[tex]\frac{1}{2} I \omega^2 [/tex] = 2.14×10^20 GJ

Or enough to flash to steam ~5x10^23 kg of cold water. The ocean mass is 1.39x10^ 21 kg. Time to redraw that map all brown, or red because the crust is going to melt too.
 
  • #13
hmmm, any planet around that has no spin but a lot of heat?
 
  • #14
No spin and a lot of heat... to some extent Venus fits. It rotates, but very slowly, and surface temperatures are high enough to melt lead.
 
  • #15
Now, isn't that interesting? :tongue:
 
  • #16
Actually, Venus rotates in reverse, and is the only planet in the solar system that does so. This is an indication of some cataclysmic event, like a large bolide strike, which would explain the conditions observed.
 
  • #17
But still the 'rotational kinetic energy' has to go somewhere or?

For alternate ideas how you can stop a planet spinning, see Correia et al 2002 and part II (but they did not do the math on conversion of spinning energy).
 
  • #18
chazzone said:
Actually, Venus rotates in reverse

I have learned long ago to not even pretend I understand women.
 
  • #19
What if they used a tractor beam?
 
  • #20
I think Baxter had a story once where humans discovered massive superconducting cables wrapped around Venus which had been used to exchange the spin of the planet to a moon it used to have which would have been flung out of the solar system, at the cost of ruining the planet.
 
  • #21
I too saw the discovery documentary I have agree, it did lack science.

I was actually trying to find a link to it when this little gem popped up:

"If the Earth stopped, all humans would go flying off" - http://community.discovery.com/eve/forums/a/tpc/f/7501919888/m/91919730201/p/1 [Broken]

The title question of that thread says it all really. Don't whether to laugh at the stupidity or cry at the lack of education.
 
Last edited by a moderator:
  • #22
chazzone said:
Actually, Venus rotates in reverse, and is the only planet in the solar system that does so. This is an indication of some cataclysmic event, like a large bolide strike, which would explain the conditions observed.


Right. It's proximity to the sun would mean it could have been hit by a large object coming back from the sun on a comet like trajectory. The slingshot affect of going around the sun would have meant it was traveling at an extremely high speed. If it was close enough to the sun as it went around, it might even have still been partially molten at the time of the collision.

Astronomers speculate that our moon resulted from a collision with a large object that caused what became the moon to be ejected.

collision of Venus with a molten or partially molten mass could produced an extremely high temperature at the time of the collision resulting in the mass "melting" into Venus. Such an event would have evaporated any water, including subterranean water. Water is a light weight gas when compared to other atmospheric gases and could easily escaped Venus gravity at a high temperature.

The dense cloud cover could prevent the surface from receiving any significant solar radiation by reflecting the radiation back into space.

Earth's atmosphere loses heat from updrafts which convert the potential energy of rising gases to potential energy which is not converted back to heat when the air returns to the surface as a downdraft. That process may not exist on Venus because the heavy cloud cover may prevent vertical movement of gases.
 
  • #23
Earth's atmosphere loses heat from updrafts which convert the potential energy of rising gases to potential energy which is not converted back to heat when the air returns to the surface as a downdraft. That process may not exist on Venus because the heavy cloud cover may prevent vertical movement of gases.

I'm having trouble following this statement. Perhaps you'd like to elaborate?
 
  • #24
Studiot said:
I'm having trouble following this statement. Perhaps you'd like to elaborate?

Heated air goes up, loses heat to space.
Air falls, but does not reconvert back to heat.
 

1. What is the impact of global warming on ocean levels?

Global warming is causing the Earth's temperature to increase, which is causing the oceans to warm and expand. This expansion is contributing to a rise in ocean levels, which can have significant impacts on coastal communities and ecosystems.

2. How much have ocean levels risen due to global warming?

According to NASA, sea levels have risen by about 8 inches since 1880, and the rate of increase is accelerating. This rise is primarily due to the melting of glaciers and ice sheets, as well as the thermal expansion of the ocean.

3. Will the rise in ocean levels continue to accelerate?

It is predicted that the rise in ocean levels will continue to accelerate in the coming decades due to the continued warming of the Earth's atmosphere and oceans. However, the exact rate of increase is difficult to predict and can be influenced by various factors.

4. What are the potential consequences of rising ocean levels?

Rising ocean levels can have a range of consequences, including increased coastal flooding and erosion, loss of coastal habitats, and displacement of coastal communities. It can also lead to more frequent and severe storms and other extreme weather events.

5. How can we mitigate the impact of rising ocean levels?

To mitigate the impact of rising ocean levels, it is crucial to reduce our carbon emissions and slow down the rate of global warming. Additionally, implementing adaptation strategies such as building seawalls and restoring coastal habitats can help protect against the effects of rising ocean levels.

Similar threads

Replies
7
Views
5K
  • Earth Sciences
Replies
2
Views
2K
Replies
4
Views
1K
  • Earth Sciences
Replies
10
Views
4K
Replies
2
Views
4K
  • Earth Sciences
Replies
25
Views
7K
  • Earth Sciences
Replies
2
Views
4K
  • Earth Sciences
Replies
4
Views
6K
  • Earth Sciences
Replies
2
Views
4K
Back
Top