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Amir Mohsen

متخصص بخش هواشناسی
Floods Kill 23 in Northern India; Dozens Missing

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June 17, 2013

LUCKNOW, India -- Torrential rain and floods washed away buildings and roads, killing at least 23 people in the northern Indian state of Uttarakhand, officials said Monday.
More than a dozen people died in the state's Rudraprayag district alone, while another 50 people were missing, said Amit Negi, an official in Uttarakhand.
A landslide triggered by the monsoon rains buried a bus, killing three people in Almora district.
At least three other people were washed away when a three-story apartment building toppled into a river and was carried away by the swift-moving current, said Amit Chandola, a government spokesman.
More than 10,000 pilgrims stranded along a mountain pass leading to a Hindu religious site were being evacuated by helicopter after roads to the pilgrimage spot were blocked by landslides.
Army and paramilitary troops were leading efforts to rescue scores of people from the rooftops of their flooded homes. The state government was readying food parcels and drinking water pouches to be air dropped to villages cut off after roads were washed away.
The River Ganges and its tributaries are flowing above the danger mark in several areas in the Himalayan state.
"The situation is very grim. The meteorological office has predicted that the rain will continue for another three days at least," said Chandola.
State authorities were preparing to evacuate people from the worst-hit districts to relief camps, he said.
A high alert and flood warnings have been issued across Udhampur district and in the Hindu holy city of Haridwar as rivers breached their banks,
Flooding is an annual occurrence in India, which depends on monsoon rains for agriculture. The heavy downpours often cause loss of life and property.



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Bulldozers and other vehicles are drifted in a flooded river in Uttarkashi district, India, Monday, June 17, 2013. (AP Photo)

 

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Amir Mohsen

متخصص بخش هواشناسی



Can We Control the Weather?


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By: Liz Burlingame
Published: June 16, 2013

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Cloud seeding, which began in the 1940s, uses silver iodide (or similar chemical particles) to mimic the ice nuclei that allows for the growth of water droplets. Aircraft, rockets or artillery guns deploy the particles in the atmosphere. The effectiveness of this method remains controversial.




Humans have dreamed of taking control of the weather long before Superman and James Bond villains plotted world domination.
Growing concerns over climate change and major disasters such as Hurricane Katrina and the deadly tornado outbreaks in Oklahoma have only increased our desire to stop severe weather in its tracks. We've put vehicles on Mars and invented the Internet — why can't we alter the weather?
It hasn't been for lack of trying. In the last 200 years, the clouds have proven a resilient adversary, according to the Boston Globe, resisting well-funded and imaginative attempts at manipulation by meteorologists, physicists and hobbyists.
(MORE: What Punched a Hole in These Clouds?)
Ideas have ranged from building massive rain towers to alleviate drought to using anti-aircraft guns loaded with silver iodide to keep rain away from the Beijing Olympics.
Here's a look at some of these ideas and technologies, and the colorful history behind weather control attempts:
Flying Supersonic Jets into Hurricanes

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Hurricanes can wreak major havoc when they hit populated areas, but one researcher believes these storms could be broken up by F-4 jet fighters.
University of Akron at Ohio professor Arkadii Leonov and his colleagues applied for the patent for this method in 2008, as New Scientist reported.
In a nutshell, a pilot would fly a supersonic jet aircraft in concentric circles around the eye of the hurricane. The jets would generate a sonic boom that would disrupt the upward flow of warm air that creates the hurricane. Because sonic booms spread out as they travel away from the aircraft, even a small number of jets could do the job, Leonov explained to i09.
A former director of NOAA's Hurricane Research division, Hugh Willoughby, told i09 he wasn't keen on the idea.
"The shock wave is like a very intense sound wave that passes through the meteorological motions without affecting them much," he said. "The metaphor of shouting in the wind is apt."

 
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