Global Freezing: An Upcoming Apprehension for Civilization


By

Dr. Parimalendu Bandyopadhyay
Lecturer, Department of Business Administration
Joydeep Chowdhury
Lecturer, Department of Computer Application
B.B College, The University of Burdwan
Asansol
 


ABSTRUCT:

It was a charming morning of December in  a city of USA, the temperature generally varies from 0-4 degree celcious. But, that day was not like other one. The whole city had been covered by the layer of 4 ft of ice. The inhabitance of that city found that no electricity, no water supply were available. Electric poles had been broken down and the water into the pipeline became ice. Transportation also rapped out .People those who had embarrassed in their car and houses, were praying to God when this situation would be pass away.

After four days the weather pleased on the inmates and the sky became clear but it left a big question to every one.

" Is it the initialization of the era of cold"?
"Is it the bell for upcoming Global freezing?"
 

The era of cold come after every 50,000 years which is the estimate assume by geologists and scientists. They are calculating the period gap when last  era of cold occur and the result is not very satisfactory. According to them, it may start within 400-450years. 

But it create another question rather the solving the previous one.

"Why the era of cold started in earth"? 

Reasons behind global freezing:      

Global freezing in general can refer to a cooling of the Earth. More specifically, it refers to a conjecture during the 1970s of imminent cooling of the earth's surface and atmosphere along with a posited commencement of glaciations. This hypothesis never had significant scientific support, but gained temporary popular attention due to press reports following a better understanding of ice age cycles and a slight downward trend of temperatures from the 1940s to the early 1970s.

Earth as a whole has not been cooling in recent decades, but is in a period of global warming. There are so many factor acting behind these sense: They are as follows

CARBON DIOXIDE'S EFFECTS.

Effects of Large Increases on Global Climate examined the possible future effects of two types of human environmental emissions:

1. greenhouse gases such as carbon dioxide;

2. particulate pollution such as smog, some of which remains suspended in the atmosphere in aerosol form for years.

Greenhouse gases were regarded as likely factors that could promote global warming, while particulate pollution blocks sunlight and contributes to cooling. Aerosols were more likely to contribute to climate change in the foreseeable future than greenhouse gases, stating that quadrupling aerosols "could decrease the mean surface temperature (of Earth) by as much as 3.5 C. If sustained over a period of several years, such a temperature decrease could be sufficient to trigger an ice age!"

In the 1970s, there was increasing awareness that estimates of global temperatures showed cooling since 1945. The general public had little awareness of carbon dioxide's effects on climate, although Paul R. Ehrlich mentions climate change from the greenhouse gases in 1968. By the time the idea of global cooling reached the public press in the mid-1970s, the temperature trend had stopped going down, and there was concern in the climatologically community about carbon dioxide's effects. It was known that both natural and man-made effects caused variations in global climate.

Currently, there are some concerns about the possible cooling effects of a slowdown or shutdown of the thermohaline circulation, which might be provoked by an increase of fresh water mixing into the North Atlantic due to glacial melting. The probability of this occurring is generally considered to be very low, and the IPCC notes, "However, even in models where the THC weakens, there is still a warming over Europe. For example, in all AOGCM integrations where the radioactive forcing is increasing, the sign of the temperature change over north-west Europe is positive.


:CO2 , temperature, and dust concentration measured from Vostok ice core at Antarctica.:

Measurements taken during 2005 and reported in November show the rate of movement of the Atlantic Ocean's Gulf Stream, which carries warm Caribbean waters to the west coast of northern Europe, has slowed by 30 percent relative to measurements taken in 1992. Alarmists quickly claimed those findings as evidence of large-scale global warming.

According to the predictions of some alarmists, warmer temperatures will cause more glacial melt from Greenland and the North Atlantic, which will impede the operation of the Gulf Stream. Some alarmists claim the entire Gulf Stream could shut down, leading to another ice age, if warming continues on its current course.

The media were quick to spread alarm. In anticipation of the findings, the London Guardian ran a November 13 article titled "Will global warming trigger a new ice age?" Following the study's release, the Guardian published a December 1 article claiming "Alarm over dramatic weakening of Gulf Stream."

ORBITAL FORCING

The other mechanism was orbital forcing ,slow changes in the tilt of the planet's axis and shape of the orbit change the total amount of sunlight reaching the earth by a small amount and the seasonality of the sunshine by rather more. This mechanism is believed to be responsible for the timing of the ice age cycles, and understanding of it happened to be increasing rapidly in the mid-1970s.

The idea that ice ages cycles were predictable appears to have become conflated with the idea that another one was due "soon" - perhaps because much of this study was done by geologists, who use "soon" to refer to periods of centuries to tens of millennia or more. A strict application of the orbital forcing theory does not allow the prediction of a "rapid" ice age onset (rapid being anything under a century or two) since the fastest orbital period is about 20,000 years.

It is common to see it asserted that the length of the current interglacial temperature peak is similar to the length of the preceding interglacial peak (Sangamon/Eem), and from this conclude that we might be nearing the end of this warm period.

CONCLUSION:

Though we have gather lots of knowledge about Global Freezing, some things make contradiction that whether Earth will be much and much cooler or become hotter ? but what ever will be happen, we have to prepare for a tuff condition. The bell warn us that the giant is arising.

In popular culture The Clash's song London Calling is probably still the most widespread example, the first chorus is:

" The ice age is coming, the sun's zooming in 
Meltdown expected, the wheat is growing thin 
Engines stop running, but I have no fear 
Cause London is drowning, and I live by the river"

Other than indicating the emergence of the idea within pop culture, this song makes little sense: the sun zooming in would cause warming and an ice age lowers sea levels rather than raising them.

The time has come to thing for us, our future and must take steps to thing and do about the above factors. Otherwise may be, one day morning when we wake up, we find us  under the tomb of ice.
 


Dr. Parimalendu Bandyopadhyay
Lecturer, Department of Business Administration
Joydeep Chowdhury
Lecturer, Department of Computer Application
B.B College, The University of Burdwan
Asansol
 

Source: E-mail December 5, 2007

          

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