When and why did climate change begin?

Answer 1

The current warming trend started about 10.400 years ago it is universally agreed upon.

A:An perceptible upward trend in average global temperatures began in the middle of the eighteenth century at the time of the Industrial Revolution. Even in the early decades of the twentieth century, scientists were uncertain whether the trend would continue and whether it was a cause for concern. It was not until the 1970s that many scientists began to believe that a dangerous trend was taking place.

Other climate changes occur as a result of rising temperatures but these are not so easy to quantify, since it is not possible to attribute any single weather event to climate change. However, the gradual increase in the frequency and intensity of some storm types is consistent with predictions about global warming, as are extreme changes to rainfall, with different areas experiencing prolonged droughts and more frequent severe floods. the general community is beginning to be aware of changes in the weather, but scientists can not yet agree how long some types of climate change have been established.

Answer 2

Anthropogenic (human caused) climate change began in earnest about 30 years ago, in the 1980s. At that time the change was fairly slow. It is a little faster now, and is expected to soon begin picking up the pace.

You might wonder why climate effects had not been noticed prior to that. Mankind has doubled its consumption of fossil fuels several times since 1980, so that although we had burned quite a bit in the decades prior, our appetite really blossomed in the intervening years.

Answer 3

Current climate change began at the beginning of the industrial revolution, in response to increases in atmospheric carbon dioxide from the burning of fossil fuel.

The initial change was very small. We can see much more dramatic effects beginning about 30 years ago, and CO2 levels eclipsed 350 ppm.

The climate is always changing, often in response to long period orbital cycles known as Milankovitch Cycles. The last dramatic change occurred with the end of the last ice age, some 15 to 20 thousand years ago. That change occurred over thousands of years, however, whereas the current rate of change is occurring within a span of mere decades.

Answer 4

The Earth has been warming up since the start of the industrial age. Conventional wisdom says the machines of modern life -- and the fuels that powered them -- began to change the climate. But one scientist has a theory that climate change began much, much earlier... as in thousands of years ago.

One of the consequences of the rapid industrialization has been the entering of artificial wastes into the air and water which have posed dangers to human and wildlife. Since the dawning of industrial revolution man has been making use of such ways which though help him in making his work quick and easy but have been adversely affecting the earth's environment. For millions of years we have known a world whose resources seemed illimitable. However fast we cut down trees, nature unaided would replace them. However much sewage we dumped into the river, nature would purify it. Today we have reached the stage of realizing that rivers can be polluted past praying for, that seas can be over fished and the forests must be managed and fostered if they are not to vanish.

The fact is that we are just beginning to press up against the limits of the earth capacity. We begin to have to watch what we are doing to things like water, oxygen and fossil fuels. We needlessly intervene in nature's transactions. For instance, we cut down the forests which transpire water and oxygen, we build dams and pipelines which limit the movement of animals, we pave the earth and build water reservoirs altering the water cycle. So far, nature has brushed off these injuries as pinpricks. But now we are becoming so strong, that they are beginning to hurt.

The consequences of this rapid industrialization of man have been nothing short of devastating. Rivers are getting more and more polluted, Animals are becoming extinct, Fish are dying due to Water pollution and the earth's climate is also changing. This in turn, has resulted in Global Warming. Global Warming is defined as the rise in global temperature on the earth. Global warming is happening. But we can do something about it. The evidence that global warming is real is clear and compelling. Measurements taken from taken from all over the world have shown that the average global temperatures have been on a rise. Since only the 19th century the average surface temperature of the earth has increased by an alarming 1 degree Fahrenheit. Adding to that, 1998 was the warmest year ever recorded. The signs are not good. If the earth continues to warm at the pace the scientists predict then the temperature of the earth may rise by as much as 2-3°C by the year 2100. This rapid change in earth's climate would be harmful to ecosystems and human and wildlife. Warmer global temperatures are also expected to produce a more vigorous hydrological cycle, with the strong prospect of more severe droughts, floods in geographical areas prone to those types of events.

Answer 5

About when the Earth began, and it has never stopped. Just in the last million years, we've had a dozen ice ages where everything down to about St. Louis was under several thousand feet of ice, alternating with "inter-glacials"; warm periods when most of the glaciers had melted and trees grew in the far north. We're currently somewhere near the middle of the two extremes. 4000 years ago, there were no glaciers in the Alps, and Greenland was a "green land"; then it got cold again.

2000 years ago, Scotland grew wine grapes. 1500 years ago, not even northern France could grow grapes. 1000 years ago, the Vikings settled Greenland and set up dairy farms; these all failed when the ice returned in the 1300s. By the mid-1700s, the Hudson River would freeze so solidly that General Washington had horses dragging cannon across the ice to attack New York, and the Thames froze solidly enough that ice carnivals were routine in winter. It started to get somewhat warmer around the 1830s, and it continued to get generally warmer until about 1998.

The current hysteria over "climate change" began in the 1970's as a panic about global COOLING and the coming ice age; by the mid-1980s', it had morphed into global WARMING. In each case, the prescription was for more government control, reduced freedom and liberty, and massive increases in taxes and government spending. However, there has been no substantial warming since about 1998, and the climate is presently stable. There are indications that the next part of the cycle will be a cooling trend, probably until about 2060.

All the politicians are hyping global WARMING, because they hope to be able to keep people panicking and paying higher taxes to support them, but the actual SCIENTISTS are split on the issue. The recent IPCC report was a pretty bland thing when the scientists wrote it, but the "Executive Summary for Policymakers" was written by the politicians and makes wild and absurd claims of warmist catastrophes to come.

For example, the following is a quote by H. L. Mencken;

The whole aim of practical politics is to keep the populace alarmed (and hence clamorous to be led to safety) by menacing it with an endless series of hobgoblins, all of them imaginary.

H. L. Mencken

Answer 6

Glacier retreats and advances are, in the Geological Aspect, quite common.

Their causes are numerous.