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    Facebook signs letters of intent with 3 Australian media companies

    Facebook signs letters of intent with 3 Australian media companies

    Facebook has reached an agreement with the Australian government. Australian users will be able to read the news normally.

    Facebook has reached an agreement with the Australian government. Australian users will be able to read the news normally.

    Facebook CEO and Australian Treasury Minister reached an agreement

    Facebook CEO and Australian Treasury Minister reached an agreement

    Putin: Russia has handed over Russian vaccine production technology to Belarus

    Putin: Russia has handed over Russian vaccine production technology to Belarus

    Many classic animations in the United States have been labeled as "offensive content" by Disney.

    Many classic animations in the United States have been labeled as “offensive content” by Disney.

    Biden's nominated director of the health director, making $2.6 million during the pandemic

    Biden’s nominated director of the health director, making $2.6 million during the pandemic

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    Woods was involved in a car accident in a frequent area. U.S. officials requested a road section investigation.

    Woods was involved in a car accident in a frequent area. U.S. officials requested a road section investigation.

    South Korean sports scandal again: Men's volleyball players admit to bullying classmates and retire immediately

    South Korean sports scandal again: Men’s volleyball players admit to bullying classmates and retire immediately

    The president of the American baseball team resigned due to discriminatory remarks. He once suspected that the Japanese player's English was poor.

    The president of the American baseball team resigned due to discriminatory remarks. He once suspected that the Japanese player’s English was poor.

    New York City cinemas will welcome guests in March. The economy will reopen one step further.

    New York City cinemas will welcome guests in March. The economy will reopen one step further.

    Macron bet with French Internet celebrities: Click more than 10 million to shoot interesting videos together

    Macron bet with French Internet celebrities: Click more than 10 million to shoot interesting videos together

    Nine crowns! Djokovic swept Medvedov and won the Australian Open for the ninth time.

    Nine crowns! Djokovic swept Medvedov and won the Australian Open for the ninth time.

    American professor worried about the damage of the violin at low temperature and slept with his son hugging it.

    American professor worried about the damage of the violin at low temperature and slept with his son hugging it.

    Seiko Hashimoto, the new chairman of the Tokyo Olympic Organizing Committee, promised to promote reform and increase the proportion of female directors.

    Tokyo Olympic Organizing Committee Chairman Seiko Hashimoto applies to withdraw from Japan’s ruling Liberal Democratic Party

    Malaysian Open and other events have been postponed. The Tokyo Olympic points match will be extended by one month.

    Malaysian Open and other events have been postponed. The Tokyo Olympic points match will be extended by one month.

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    The French Prime Minister called for strengthening prevention and control law enforcement. Paris intends to reduce public transportation capacity.

    The French Prime Minister called for strengthening prevention and control law enforcement. Paris intends to reduce public transportation capacity.

    Fauci: The pandemic situation in the United States is still in a very dangerous situation.

    Fauci: The pandemic situation in the United States is still in a very dangerous situation.

    The second batch of China's SinoVac coronavirus vaccine arrived in Mexico.

    The second batch of China’s SinoVac coronavirus vaccine arrived in Mexico.

    Tragedy of the pandemic in the United States: an 11-year-old girl returned home and found that her parents died while quarantined.

    Tragedy of the pandemic in the United States: an 11-year-old girl returned home and found that her parents died while quarantined.

    Palestine Coronavirus Worries, Iran Warns Fourth Round of Coronavirus Peak

    Palestine Coronavirus Worries, Iran Warns Fourth Round of Coronavirus Peak

    The average age of new coronavirus diagnosis in Italy has dropped to 44 years. New laws are about to come out.

    The average age of new coronavirus diagnosis in Italy has dropped to 44 years. New laws are about to come out.

    Brazilian medical experts worry about the collapse of the medical system and call for curbing the spread of Variant viruses.

    Brazilian medical experts worry about the collapse of the medical system and call for curbing the spread of Variant viruses.

    The first batch of SinoVac coronavirus vaccine purchased by Malaysia from China arrived in Kuala Lumpur.

    The first batch of SinoVac coronavirus vaccine purchased by Malaysia from China arrived in Kuala Lumpur.

    Italian Ministry of Health officials: Beware of variant coronavirus and campus transmission

    Italian Ministry of Health officials: Beware of variant coronavirus and campus transmission

    WHO: There is a possibility of a new pandemic in the future

    WHO: There is a possibility of a new pandemic in the future

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      Facebook signs letters of intent with 3 Australian media companies

      Facebook signs letters of intent with 3 Australian media companies

      Facebook has reached an agreement with the Australian government. Australian users will be able to read the news normally.

      Facebook has reached an agreement with the Australian government. Australian users will be able to read the news normally.

      Facebook CEO and Australian Treasury Minister reached an agreement

      Facebook CEO and Australian Treasury Minister reached an agreement

      Putin: Russia has handed over Russian vaccine production technology to Belarus

      Putin: Russia has handed over Russian vaccine production technology to Belarus

      Many classic animations in the United States have been labeled as "offensive content" by Disney.

      Many classic animations in the United States have been labeled as “offensive content” by Disney.

      Biden's nominated director of the health director, making $2.6 million during the pandemic

      Biden’s nominated director of the health director, making $2.6 million during the pandemic

      Trending Tags

      • Google
      • Apple
      • Microsoft
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      • Science & Technology
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      Woods was involved in a car accident in a frequent area. U.S. officials requested a road section investigation.

      Woods was involved in a car accident in a frequent area. U.S. officials requested a road section investigation.

      South Korean sports scandal again: Men's volleyball players admit to bullying classmates and retire immediately

      South Korean sports scandal again: Men’s volleyball players admit to bullying classmates and retire immediately

      The president of the American baseball team resigned due to discriminatory remarks. He once suspected that the Japanese player's English was poor.

      The president of the American baseball team resigned due to discriminatory remarks. He once suspected that the Japanese player’s English was poor.

      New York City cinemas will welcome guests in March. The economy will reopen one step further.

      New York City cinemas will welcome guests in March. The economy will reopen one step further.

      Macron bet with French Internet celebrities: Click more than 10 million to shoot interesting videos together

      Macron bet with French Internet celebrities: Click more than 10 million to shoot interesting videos together

      Nine crowns! Djokovic swept Medvedov and won the Australian Open for the ninth time.

      Nine crowns! Djokovic swept Medvedov and won the Australian Open for the ninth time.

      American professor worried about the damage of the violin at low temperature and slept with his son hugging it.

      American professor worried about the damage of the violin at low temperature and slept with his son hugging it.

      Seiko Hashimoto, the new chairman of the Tokyo Olympic Organizing Committee, promised to promote reform and increase the proportion of female directors.

      Tokyo Olympic Organizing Committee Chairman Seiko Hashimoto applies to withdraw from Japan’s ruling Liberal Democratic Party

      Malaysian Open and other events have been postponed. The Tokyo Olympic points match will be extended by one month.

      Malaysian Open and other events have been postponed. The Tokyo Olympic points match will be extended by one month.

    • Lifestyle
      • All
      • Fashion
      • food
      • Health
      • Travel
      The French Prime Minister called for strengthening prevention and control law enforcement. Paris intends to reduce public transportation capacity.

      The French Prime Minister called for strengthening prevention and control law enforcement. Paris intends to reduce public transportation capacity.

      Fauci: The pandemic situation in the United States is still in a very dangerous situation.

      Fauci: The pandemic situation in the United States is still in a very dangerous situation.

      The second batch of China's SinoVac coronavirus vaccine arrived in Mexico.

      The second batch of China’s SinoVac coronavirus vaccine arrived in Mexico.

      Tragedy of the pandemic in the United States: an 11-year-old girl returned home and found that her parents died while quarantined.

      Tragedy of the pandemic in the United States: an 11-year-old girl returned home and found that her parents died while quarantined.

      Palestine Coronavirus Worries, Iran Warns Fourth Round of Coronavirus Peak

      Palestine Coronavirus Worries, Iran Warns Fourth Round of Coronavirus Peak

      The average age of new coronavirus diagnosis in Italy has dropped to 44 years. New laws are about to come out.

      The average age of new coronavirus diagnosis in Italy has dropped to 44 years. New laws are about to come out.

      Brazilian medical experts worry about the collapse of the medical system and call for curbing the spread of Variant viruses.

      Brazilian medical experts worry about the collapse of the medical system and call for curbing the spread of Variant viruses.

      The first batch of SinoVac coronavirus vaccine purchased by Malaysia from China arrived in Kuala Lumpur.

      The first batch of SinoVac coronavirus vaccine purchased by Malaysia from China arrived in Kuala Lumpur.

      Italian Ministry of Health officials: Beware of variant coronavirus and campus transmission

      Italian Ministry of Health officials: Beware of variant coronavirus and campus transmission

      WHO: There is a possibility of a new pandemic in the future

      WHO: There is a possibility of a new pandemic in the future

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      Why did the snowstorm surprise Texas?” Stratospheric outbreak temperature increase” to understand

      February 21, 2021
      in Health, Science, Tech, World
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      Why did the snowstorm surprise Texas?" Stratospheric outbreak temperature increase" to understand

      △ Texas, USA, was hit by a blizzard (Image credit: CNN)

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      In the past week, Texas, the United States, has been hit by a blizzard, causing power outages for more than 4 million households and more than 14.9 million people without water, causing global concern.

      At the same time, many parts of southern Europe and Greece have been hit by rare heavy snow, water and electricity, and schools closed.

      △Rare heavy snow hit in many parts of Greece (Image from: Associated Press)

      Why Blizzards Surprised Greece, known for its deserts, hot suns, and Greece in the Gulf of sunshine.

      In fact, there are many reasons for “madness” weather. There are three major factors worth analyzing this year’s focus on the blizzard in the south.

      Where does the cold air come from?

      We often hear the saying “cold air from Siberia”. In fact, Siberia is not the hometown of cold air, but the “transit station” and “gas station” of cold air. The real cold source is the polar.

      The earth receives different solar radiation at different latitudes, with the polar receiving the least heat and the highest equator.

      This results in low surface temperature and high pressure in the polar regions, high surface temperature and low pressure in the equator.

      Correspondingly, a low pressure occurs at the polar high altitude, that is, the stratosphere, resulting in the formation of a polar vortex, or pole vortex for short.

      Every winter, under normal circumstances, the polar vortex of the stratosphere is surrounded by a strong westerly wind, and the extremely cold air is wrapped in the polar region like wearing a tight ring.

      At this time, our climate is normal and the temperature fluctuations are relatively small.

      However, in abnormal cases, the stratospheric polar vortex will be disturbed, deformed or collapsed, just like the tight spell that confines cold air is broken by the stratosphere.

      Its effect is transmitted downwards, which will force the cold air in the troposphere polar region to spread south on a large scale, and the cold wave will break out and the impact will begin to expand.

      Who broke the tight spell of confining cold air?

      It is well known that the weather-affected factor occurs at the bottom of the atmosphere, which is about 10 kilometers thick in the troposphere. And the stratosphere changes that even civil aircraft can’t fly sometimes interact with the troposphere, which affects our weather.

      From late 2020 to early 2021, the stratosphere over the Arctic has abnormal movements, which is a typical “stratospheric explosion and warming”. Stratospheric burst warming is caused by the propagation of atmospheric fluctuations in the lowerosphere to the stratosphere under certain favorable conditions, which affects the circulation of the stratosphere.

      The animation shows the temperature change of about 30 kilometers, that is, 10hPa, in the middle stratosphere. We can see the temperature in the Arctic polar region rising rapidly.

      The polar region temperature was about -62°C on December 31, 2020, and suddenly rose to -22°C on January 4, 2021, and the polar stratosphere temperature rose by 40 °C in just five days. The abnormal warming of the polar stratosphere weakens or turns clockwise with the powerful westerly wind circulation rotating counterclockwise in the stratosphere, thus breaking the equilibrium.

      The effects of stratospheric warming from brewing, development to outbreak usually take about two weeks to start affecting the troposphere and continue to affect the troposphere climate for the next month or so.

      However, strong stratospheric explosion heating does not occur every year, and each occurrence does not always affect the weather and climate of the same region. This year, it happens to affect Europe and the United States.

      Why did the cold wave affect North American blizzards surprise Texas and Athens?

      First of all, this cold wave is headed south by the pole vortex in person, so both the cooling ability and the scope of influence are kings.

      In the past ten days, Europe and North America have become the most obvious areas with low temperatures in the northern hemisphere, and many areas are below 10 °C.

      Secondly, the influence of topographic factors. In the process of moving southward by cold air, if the terrain is relatively flat and smooth, the speed will naturally be fast, the consumption will be less, and vice versa.

      Therefore, cold air in the ocean and plains is less hindered; mountains hinder the progress of cold air. The western part of the United States is mountainous and the central plains.

      This time, the cold air runs east of the Rocky Mountains and from the Central Plains all the way south, without any obstruction to the Gulf of Mexico. When the cold wave arrives at the same time, the warm and humid air flow from the Gulf of Mexico reaches the area simultaneously.

      The cold wave dominates the combination of warm and humid air, causing a wide range of snowy weather in the area and causing extremely serious effects.

      △ Texas, USA, was hit by a blizzard (Image credit: CNN)

      With the increasing trend of global warming, extreme weather and climate events continue unabated.

      When North America and Europe are extremely cold, February in China is surprisingly warm.

      North China, Huanghuai and other places have broken through the record of the highest temperature in February.

      In the future, we may face hotter summers, more violent convection, and more frequent winter cold wave effects.

      Tags: United States

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