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Global Warming could be changing the Climate in Pakistan

April 27th, 2006

Global Warming could be changing the Climate in Pakistan

Pakistan

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.”

 
 
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Nicole Wilson
Best Syndication

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