How many nuclear bombs would have to go off to trigger a nuclear winter?

Nuclear winter is a hypothetical set of circumstances on a likely global climate condition that would follow a large-scale nuclear war

A large nuclear bomb bursting at ground level would throw up about a million tonnes of dust and block out a large fraction of the sunlight and the sun's heat from the earth's surface. The earth would quickly become dark and cold. Temperatures would drop by something in the region of 10-20ºC. It would take months for the sunlight to get back to near normal. The drop in light and temperature would quickly kill crops and other plant and animal life while humans would be affected by very large-scale malnutrition and disease

sounds great eh!

i like gases

4000 eight kiloton ones, or eight 4megaton ones. Er....

Probally about 5,000 plus.

In the largest study ever done on the effects of nuclear war,

They estimated that 14,000 nuclear weapons would be used ( this was back in the 1980's during the cold war )

The figured that those 14,000 would cause a nuclear winter that would last about 3 years.

Well there aren't 14,000 nuclear weapons left in the world.

Both the US and Russia have reduced thier stockpiles of nuclear weapons by about 80%

I don't have a clue why people think 4 or 10 nuckes would cause nuclear winter,

There have already been over 750 above ground nuclear detonations since 1946.

Check out this article; https://www.quora.com/How-many-nukes-would-it-take-to-cause-a-minor-nuclear-winter-What-about-a-moderate-one. It explains in laymans terms by a scientist that a nuclear winter isn't really possible these days. First off, it would take a megaton bomb to be able to reach the level of our atmosphere to effect any kind of change in temperature (not the figures being bandied about) that could create havoc in our lifestyles. Currently, the US is producing max. 330kt bombs, not megaton like in the 1940-60s. From what we know about other countries, they've kept the size similar and therefore, the debris wouldn't reach high enough to really change much and our weather patterns take care of the lower atmosphere (stratosphere) clean-up. So, according to his article it would take none...the nuclear winter theory will likely remain just that, a theory.

There are 2 varieties of detonation, on the floor and interior the air. For the two, you prefer protecting between you and the detonation. of direction, the nearer you're, the greater effect you will sense. close sufficient and you die, era. 3 styles of radiation are given off, mild, warmth, and gamma/x-rays. the mild can honestly blind you in case you look right this moment at it. the warmth can burn you. The ionizing radiation will kill you in a slow and grotesque way. look what exceeded off to the firefighters at Chernobyl. So, you prefer protecting, rather from the ionizing radiation. Now, assuming you reside to inform the story the detonation by using protecting your self, now you have the logistical concern of feeding your self. An air burst does a lot of harm from blast outcomes, yet little radioactive cloth is released, so there'll never be plenty interior the way of fallout (debris that are redioactive and determine the floor after the detonation). A floor burst, even however is an entire different tale. enormous quantities of fallout can take place as minerals interior the floor are irradiated by using the radiation from the detonation and then thrown up into the air by using the explosion. So, you prefer a thank you to shield your self from radioactive fallout. somewhat some the radioactive isotopes in fallout are long-lived, meaning they are going to be around for somewhat a whilst, years. meaning you will prefer protecting for the long term. Your considerable issues would be uncontaminated water and foodstuff, and protecting from radiation. keep in mind, ionizing radiaon isn't some thing you notice or sense until way too previous due. in case you're uncovered sufficient to sense it, you're long previous a deadly exposure quantity. So, you prefer a detector to check issues out. The objective is to decrease your exposure as much as plausible. for my area, i might fairly be in one in all 2 places, as a ways away as plausible and if i'm able to;t be there, then under it whilst it is going off. i'm no longer into the discomfort and punishment of suffering...

We have learned it would definitely be more than two. I would say if you let off 10 that should do it but then again science has been wrong before. Maybe there is no such thing as a nuclear winter after all it is a theory used to scare people away from nuclear technology.

No one knows for sure. All the models for nuclear winter failed to account for the cleaning actions of snow/rain so that anything they currently put out is guessing and or BS.

About 4

One to many

about 2

About a quarter of one.