Climate / global warming rate: 1.94 degrees per century
By William Stevens, New York
Times
The last month was the warmest November in the last 105 years (in which
An orderly registration is carried out) in 48 US states, which have a sequence between them
Geographic (except Alaska and Hawaii). This trend continues into December. Right
As of Friday, the average temperature for this month in New York was 3.17
degrees Celsius above normal.
But that's the easy part. Federal scientists reported last week that 48
The countries and other large continental blocks in the world, including Europe
And Asia, it is already clear that 1999 will join 1998 as one of the two hottest years
most in the records, as they continue a long-standing trend towards a warm climate
More.
The tendency was particularly sharp in the last quarter of the 20th century. The scientists
They reported that since the mid-seventies, the surface temperature has increased
The global average at a rate of about 1.94 degrees Celsius per century. About
The same rate is estimated for the 21st century, if the industrial waste gas emissions,
that trap the heat in the atmosphere, will not decrease. By comparison, the world
It has warmed by 2.78 to 5 degrees Celsius since the last ice age
In the midst of it - 20,000-8,000 years ago.
From a global perspective, 99 appears to be slightly less warm in comparison
For the record year - 1998. This is due to the phenomenon known as "La Nina" - a reservoir
A large body of cold water, which from time to time develops naturally in the east
Pacific. Therefore the average surface temperature in 1999 is not
expected to reach the 1998 record of 14.44 degrees Celsius; She
will probably rank as the fifth highest since 1880. Nevertheless,
The trend of global warming, which turned the 90s into the warm decade
Most in records, continues.
The projected average global land temperature in 1999 is 13.83
degrees Celsius - 0.79 degrees above the average in the years 1998-1880
The warming was particularly noticeable in Europe, Asia and North America. in June
And in July, for example, Russia experienced one of the longest heat waves
its in the hundred.
Thomas Carl, director of the "National Climatic Data Center" in the north
Carolina, who reported the latest figures, says he is surprised
In view of the constant warming on land during the "La Nina" year. "We didn't see any
Something similar to that in recording the observed temperatures", he says.
Although it is too early to tell, the federal experts claim that if the conditions
The atmospheres in the North Atlantic Ocean will develop in a certain way,
Large amounts of snow may fall in the central part of the coast
The eastern, including the New York area. The experts say that at a later stage
Next year, other natural fluctuations may bring back the drought that was there
Last summer in part of the US, including in the central Atlantic region and in the north
East of the country. This is in addition to a more active hurricane season.
The trend of global warming, which has been going on for a century, apparently affects
All these processes in a way that is still not clear to scientists. temperature
The average global surface area has increased in the last century by more than five
nine degrees Celsius. Today, the prevailing scientific position is that emissions of
Atmospheric gases containing heat, such as carbon dioxide, which are produced on
By burning coal, oil and natural gas, responsible for a considerable part of these processes.
{Appeared in Haaretz newspaper, 20/12/1999{
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