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آخرينبعدي
  1396/07/26
   What Caused the Ongoing Flooding on Lake Ontario?
  NGDIR News Section-- The floodwaters have also affected residents downstream along the Saint Lawrence River. Although politicians quickly blamed regulations, scientists say it was a perfect storm of natural factors. Since April, floodwaters along the shores of Lake Ontario have closed roads, inundated homes, and destroyed break walls. Shore-bound residents have watched the lake rise almost a meter above its normal levels, eroding away shorelines and threatening homes. Lake Ontario stretche.....[More]
  1396/07/24
   Short Rains and Long Rains
  NGDIR News Section-- A recent paper in Reviews of Geophysics examined the drivers of interannual and regional rainfall variability in eastern Africa. We tend to hear about the climate of eastern Africa when it makes the news headlines, either for a severe drought or floods, both of which can be devastating for local populations, their crops and wildlife. A recent review article published in Reviews of Geophysics gave an overview of the current state of knowledge on the region's rainfall regim.....[More]
  1396/07/23
   New Study Shows the Amazon Makes Its Own Rainy Season
  NGDIR News Section-- A new study gives the first observational evidence that the southern Amazon rainforest triggers its own rainy season using water vapor from plant leaves. The finding helps explain why deforestation in this region is linked with reduced rainfall. The study analyzed water vapor data from NASA's Tropospheric Emission Spectrometer (TES) on the Aura satellite, along with other satellite measurements, to show that at the end of the dry season, clouds that build over the souther.....[More]
  1396/07/05
   Why Salt Is This Power Plant's Most Valuable Asset
  NGDIR News Section-- Compressed air energy storage can help keep the grid running and pave the way for renewables. Ever wonder why there are so few blackouts in the United States? It effectively boils down to this: power plants are always making more power than people are asking for. As soon as electricity is produced, the electrons flow through power lines to homes, businesses, schools, and hospitals-wherever it is demanded. More electricity is made than grid operators expect you to cons.....[More]
  1396/07/01
   Hurricane Irma cut power to nearly two-thirds of Florida's electricity customers
  NGDIR News Section-- Hurricane Irma struck Florida on September 10, 2017, and knocked out power to 6.7 million electricity customers- 64% of all customer accounts in the state- according to reports compiled by the Florida Division of Emergency Management. About 100,000 customers (1% of the state total) remained without power as of September 19. The count of customers reflects the number of billed accounts or individual meters. The number of people affected by power outages is larger than the .....[More]
  1396/06/29
   Central Mexico earthquake kills more than 140, topples buildings
  NGDIR News Section-- Rescuers searched for survivors through the night after Tuesday's powerful earthquake shook Mexico City and surrounding states, killing scores and leaving many trapped under collapsed buildings. At least 149 people died in Mexico City --- the country's capital -- and in the states of Puebla, Mexico and Morelos, officials said. The epicenter of the 7.1-magnitude earthquake was 2.8 miles (4.5 kilometers) east-northeast of San Juan Raboso and 34.1 miles (55 km) south-sout.....[More]
  1396/06/29
   Puerto Rico governor: Still time to get to shelters before Hurricane Maria
  NGDIR News Section-- There is still time for Puerto Ricans to get to a government-run shelter before powerful Hurricane Maria clobbers the island, Gov. Ricardo Rossello told CNN late Tuesday. But the window of opportunity is closing. "There's still time ... but people need to move fast," Ricardo Rossello told CNN's "Anderson Cooper 360," calling the storm the "worst hurricane in modern history in Puerto Rico." US President Trump tweeted his thoughts to those on the island, a US territor.....[More]
  1396/06/27
   Puzzling pockets of rock deep in Earth's mantle explained
  NGDIR News Section-- A team led by geoscientists from Arizona State University and Michigan State University has used computer modeling to explain how pockets of mushy rock accumulate at the boundary between Earth's core and mantle. These pockets, lying roughly 2,900 kilometers (1,800 miles) below the surface, have been known for many years, but previously lacked an explanation of how they formed. The relatively small rock bodies are termed "ultra-low velocity zones" because seismic waves .....[More]
  1396/06/25
   High tsunami danger in Alaska, perhaps elsewhere
  NGDIR News Section-- Scientists probing under the seafloor off Alaska have mapped a geologic structure that they say signals potential for a major tsunami in an area that normally would be considered benign. They say the feature closely resembles one that produced the 2011 Tohoku tsunami off Japan, killing some 20,000 people and melting down three nuclear reactors. Such structures may lurk unrecognized in other areas of the world, say the scientists. The findings appear in the print edition of t.....[More]
  1396/06/25
   Challenging prevailing theory about how deep-sea vents are colonized
  NGDIR News Section-- Despite being relatively close together, two recently discovered hydrothermal vent fields in the Gulf of California host very different animal communities. This finding contradicts a common scientific assumption that neighboring vents will share similar animal communities, and suggests that local geology and vent-fluid chemistry are important factors affecting vent communities. An article just published in the Proceedings of the Royal Society B describes two remarkably di.....[More]
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