سه شنبه 12 اسفند 1399
"If so, the Northern Lights phenomenon would become a natural show exclusive to the polar regions, due to a lack of solar wind forces that often make it visible at lower latitudes," said Owens.A reduction in solar wind would see the heliosphere the &china Umbrellas manufacturers39;bubble' around the solar system maintained by particles emitted by the Sun - shrink significantly."As the Sun becomes less active, sunspots and coronal ejections will become less frequent. The study shows how sunspot records can be used to reconstruct what happened the last time the Earth experienced such a dramatic dip in solar activity more than three centuries ago.The scientists believe the coming 'grand minimum' could be similar to the Maunder Minimum of the 17th century, when sun spot activity almost stopped ? another symptom of a lessactive Sun."If the decline in sunspots continues at this rate, and data from the past suggests that it will, we could see these changes occurring as early as the next few decades," said Professor Mike Lockwood from University of Reading. London: Britain may lose the magic of the Northern Lights by the middle of the century due to major shifts in solar activity, scientists have discovered."The magnetic activity of the sun ebbs and flows in predictable cycles, but there is also evidence that it is due to plummet, possibly by the largest amount for 300 years," said Mathew Owens, from Reading's Meteorology department, who led the research.Space scientists at University of Reading in the UK conclude that plummeting solar activity will shrink the overall size of the Sun's 'atmosphere' by a third and weaken its protective influence on the Earth. The scientists predict a rapid reduction in the bubble's size by around the middle of the 21st century. The study was published in the journal ScientificReports. However, if a mass ejection did hit the Earth, it could be even more damaging to the electronic devices on which society is now so dependent," he said.. The Earth's own magnetic field deflects some of this radiation, but areasclose to the north and south poles are more vulnerable where the Earth's magnetic field is weakest.Combined with updated models and contemporary reports, the researchers were able to predict what could happen during a similar event, likely to occur in the next few decades.Due to a lack of solar wind forces the aurora lights may not be visible at lower latitudes # Plummeting solar activity will shrink the overall size of the Sun's 'atmosphere' by a third and weaken its protective influence on the Earth.This could make the Earth more vulnerable to technology-destroying solar blasts and cancer-causing cosmic radiation, as well as making the aurora less common away from the north and south polar regions for 50 years or more. Solar wind, made up of electrically charged particles from the Sun, travels at around a million miles per hour. This protective bubble helps shield the Earth from harmful radiation from outer space, but has weakened since the1950s.
نويسنده : plimanyers