Global Warming could
be changing the Climate in Pakistan
April 27th, 2006
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Pakistan |
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Juniper trees in Pakistan that are over 1,000 years old show that
rainfall over the past century have been has been the wettest. The
scientists studied the trees ring growth to correspond the amount of
rainfall each year brings. On a dry year the trees would not have much
growth and the ring would reflect this information. The study was
first presented in the current issue of the journal 'Nature' by
scientists from the Swiss Research Institute WSL, the Potsdam Geo
Research Centre, the Jülich Research Centre and the University of Bonn.
The scientists also measured the amount of oxygen absorbed in the wood.
They measured the isotopes found in the wood to determine the amount of
humidity for that year.
In the 20th century there was precipitation that considerably
more when compared to the other 900 years of the history of the tree
rings. The scientists suspect that industrialization may be part of the
cause for the weather changes and might be the reason for the increase
in rain and snowfall. With global warming it causes higher
temperatures in the atmosphere which could be holding more humidity than
usual.
The scientists compared the tree ring data against current measurements
from observation data collected by nearby meteorological stations. The
observation data in Pakistan goes back to 1898. Professor Winiger
said,”For this period of time our method tallies remarkably well with
the meteorological data.”
Other times in the history that there was wet periods were around 1200
or 1350. The amount and frequency of the precipitation in the 19th
and 20th centuries were way higher compared to all the other
time periods.
The authors of the study write the following, “in these sub-tropical and
peripheral tropical regions changes in the precipitation rate and
distribution and thus in the water balance would have a much greater
impact on people's well-being and changes in the eco-systems than the
change in temperature on its own.”
Nicole Wilson
Best Syndication
Renewable Energy Books
Keywords and Misspellings: globel warning heat
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