Change in Climate

 This is a science report.

Nuclear explosion not only will cause the radiation damage and death of many people, it will also change the climate dramatically in the area where it happened.And if the nuclear war will start, it will change the climate of the whole world. This possibility, proposed in a paper published by an international group of scientists in December 1983, has come to be known as the “nuclear winter” theory. According to these scientists, the explosion of not even one-half of the combined number of warheads in the United States and Russia would throw enormous quantities of dust and smoke into the atmosphere. The amount could be sufficient to block off sunlight for several months, particularly in the northern hemisphere, destroying plant life and creating a subfreezing climate until the dust dispersed. The ozone layer might also be affected, permitting further damage as a result of the sun’s ultraviolet radiation. Were the results sufficiently prolonged, they could spell the virtual end of human civilization.

I wonder than the country we live, the envoriment, the climate effects our eye colour, hair colour, weight, tall?What do you think, for example someone went a country, does his generation has different phsical features?
Brailleonsundays, thanks, I know that bu I asked a different thing.If you go different country, has your generation got different features?
Brailleonsundays, thanks, I know that but I asked a different thing.If you go different country, has your generation got different features?

I am doing a research project on Supervolcanoes and their climate effects. If I were to (hypethetically) say that The supervolcano under Yellowstone National Park were to erupt, I know that the surfuric acid cloud would kill everything within between 250-700miles, create a nuclear winter, result in lower temperatures by 10-15C, and destroy our ecosystems.

How long would it take before the ecosystems were able to recovery, and how long would (the remainder) of humans be forced to survive with limited vegetation? And how long would the nuclear winter last? (I have heard people state between 4-5years, up to 10-12 years?)

Thanks for any possible assistance.

For a long time it has been believed that the effects of global warming on agriculture and food supply is going to be a positive one. This is because the rising level of carbon-dioxide resulted for global warming will help the greeneries for photosynthesis.

Thus there will be a rise of agricultural production and food supply. The theorem received a boost after the evidence of a sharp rise of barley production as one of the effects of global warming in Iceland which was quite impossible even few years ago.

But more recent experiments and researches have revealed that the effects of global warming on agriculture and food supply are not that good after all. AN UNEP 2001 report on the global warming has predicted that USA is going to have more droughts, floods, landslides and storms.

Winter will gradually be shortened and sobered down, while summer will rise in expansion and severity. Along with this heavy rain, big storm, heavy snowfall, high sea level, increasing coastal erosion and other problems will occur.

Though as one of the effects of global warming, the overall food supply and production level is supposed to rise in USA, but the Great Plains will suffer with more droughts resulting for global warming.

Even now many effects of global warming on agriculture and food supply have been perceived. The popular maple syrup production of North east USA has diminished by 10%, moving its production zone to farther north for shorter and warmer winter.

On the other hand as one of the effects of global warming the south west USA is suffering from a water shortage which will increase in coming days. The zone has become dry for any standard agricultural production with an apprehension of resettling Dust Bowl of 1930s’ by the year 2030 for global warming.

Following a report of IPCC on the global warming, California’s snow covered Sierra Mountains can reduce in near future by up to 60-90%. This will create dire water shortage in summer, making the Central Valley area unsuitable for agricultural production for global warming. The State University of Colorado has declared that the area is going to be less productive due to effects of global warming on agriculture and food supply.

As the effects of global warming, the food supply production in Florida is going to suffer a lot due to frequent and large scale floods. Also one of the most profitable agricultural products of USA – corn will suffer a bad condition due to dry and hot atmosphere for global warming.

As another example of the effects of global warming on agriculture and food supply – with the rise of temperature by 3 to 11 degrees in this century, the production rate of the main crops – the rice, corn, wheat, barley, soybeans and sorghum – will be cut down by 3-5% for each point rise of temperature for global warming.

However with all these effects of global warming on agriculture and food supply, new attempts have been made to adjust the agricultural and food production method according to the changing atmosphere. So to fight the effects of global warming, the researchers have established new methods of production with continuous revision of models. But still the best possible process to reduce the effects of global warming on agriculture and food supply is to be established.