please tell me about climate change and its impact .?

Question

any web portal related to this can also be provided.

Answer 1

The earth's climate is always changing. From around the 1300s to the 1800s, it was cooling because of a reduction in the sun's output known as the maunder minimum. From around the middle 1800's, the sun's output started to increase, and temperatures have been rising in accordance with this increase.

In addition, for the last 10,000 years or so, the earth has been in a relatively warm "interglacial period" of the current ice age. But even within those 10,000 years, the earth's temperature has been swinging to about 3*C warmer an cooler than it is now. See the attached ice core study.

Answer 2

Climate change is a vague term. The variables in it start with what is changing about the environment (e.g., temperature or moisture), which direction it is changing, and how drastically it is changing. In addition, the term "climate" may mean a small area of a few hundred square miles, a continent, or the whole planet.

Even once those are determined, finding the root cause is a challenge.

You have to understand that climates, both locally and globally, have always been changing. Ice ages come and go. Oceans recede leaving swamps, which become forests or grasslands or deserts. This is often hard on creatures that live there when the change begins, obviously prehistoric whales that swam above what is now Death Valley didn't do well when the oceans dried up.

These changes usually occur over long periods, thousands of years and more. The dramatic changes in environment resulting from the ocean floor rising to become the Alps took some time, just like wearing away mountains to become the Ozark foothills or the Grand Canyon takes time. However, sometimes they might be sudden such as when the Atlantic poured through the Strait of Gibraltar and gave us the Mediterranean. That was probably a catastrophic event at the time, but I'm sure the folks along the Riviera don't mind it much

Attempting to measure a global climate change with a few centuries of data is self-deceptive. Even assuming the data is uniform and accurate, you cannot be sure that the trend line shows an increase, or if we are merely reaching a peak in a longer cycle. Which it is cannot be known for a few decades, possibly centuries.

The real problem in the climate change debate is in assigning causation. Connection between two events does not imply causation. Remember the Beverly Hillbillies, how Jed used to hear the doorbell, and say "Every time that music plays, someone comes to the door."? He had observed the connection between the two events, but hadn't quite figured out that causal connection.

Since the trend lines that the alarmists point to in predicting dire results as a result of increasing temperatures caused by increasing carbon output do not accurately predict the past, it is possible that the causation is reversed. It is equally plausible that an increase in temperature causes an increased co2 level, leaving the cause of the temperature increase unidentified.

The Earth is a dynamic place. Things change. Nothing is static. Anyone that seems to think it is or should be probably isn't a very credible source of information on the subject.

Answer 3

Climate changes reflect variations within the Earth's atmosphere, processes in other parts of the Earth such as oceans and ice caps, and the impact of human activity. The external factors that can shape climate are often called climate forcings and include such processes as variations in solar radiation, the Earth's orbit, and greenhouse gas concentrations.

Answer 4

Read 'State of Fear' by Dr. Michael Crichton. He probably has some of the best information about climate change.

Also his official web page has many great articles about global warming as well.

Link provided below:

Answer 5

Some gases ("greenhouse gases") let sunlight in, which warms the Earth, and then block that heat from leaving. That's the "greenhouse effect", and it's a natural thing, mostly caused by water vapor.

Man is making excessive amounts of greenhouse gases, mostly by burning fossil fuels. That causes the delicate natural balance to go out of whack and the Earth warms. That's "climate change" or "global warming".

It won't be a Hollywood style disaster. Gradually coastal areas will flood and agriculture will be damaged. But it will be very bad. Rich countries will cope, but it will take huge amounts of money. In poor countries many people will die of starvation, but not all of them.

Most scientists say, in 20-50 years. But we need to start right now to fix it, fixing it will take even longer than that.

More information here:

http://profend.com/global-warming/

Lots of numerical scientific data proving it real here:

http://en.wikipedia.org/wiki/Image:Climate_Change_Attribution.png
http://www.ipcc.ch/SPM2feb07.pdf

Answer 6

plannets are either go warming or go cooling. but earth has been showing sign of getting warmer and warmer. with this gradual increase in the temperature, life on earth is likely to extinguish!