Those 2-mm layers were carbon-dated (a very accurate way of telling how long a substance has been in the ground) and carefully examined for G. bulloides.
As a result of this research, the team was able to check the intensity of monsoons for as far back as 1,000 years. And what did they discover regarding monsoons over the past one thousand years? There was a "low in monsoon wind intensity" around the year 1,600, the article reports, but since then there has been "a steady increase." And moreover, the abundance of G. bulloides shows the scientists that there has been "a more marked increase in monsoon during the past 100 years.
Researchers attribute the rise in wind intensity from monsoons over the past 100 years to global warming. The reason scientists involved with this research feel sure that global warming is causing the more intense monsoon winds because in Asia, global warming may create "a greater summertime disparity between land and ocean temperatures," according to Anderson. As a result of this contrast in temperatures, monsoon intensity logically will rise. "This study provides additional evidence of anthropogenic climate change," said Meehi. But this is not all bad news, since higher intensity of monsoon winds "might mean fewer crop failures" in Asia. But along with that possible positive note, the increased intensity of monsoons (wind and rain) could also cause flooding and erosion that could negatively affect the livelihood "of millions."
Another interesting side note of monsoons in Asia - published in the New Scientist magazine - occurred in August 2007, as political leaders in Nepal blamed India for floods in Nepal's low-lying region called Terai. This low-lying area was under water following intense monsoon rains, because, according to the Nepalese foreign ministry, India has built dams along the border with Nepal. Those dams cause the water to back up dramatically when heavy rains fall, and some of the dams are not legal, according to the story in New Scientist. The rivers that are dammed up are tributaries of the main Indian River, Ganges, which has as its source the...
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