Results 1 to 4 of 4

Thread: Explain today's weather in simple terms

  1. #1
    Senior Member razz's Avatar
    Join Date
    Dec 2010
    Location
    Ontario, Canada
    Posts
    7,768

    Explain today's weather in simple terms

    It is all about understanding the jet stream and the influences impacting its flow.
    I like Gywnne Dyer, a British journalist, writing article in terms that are easier for me to understand. During the severe cold snap in Texas in February and today's hot weather in the West US and CAN and Brazil, it starts with understanding the jet stream https://gwynnedyer.com/2021/texas-ro...es-and-wave-7/ and the Rossby waves.

    The energy that drives the jet stream comes from the temperature difference between the two air masses it divides. However, the Arctic is warming much faster than the rest of the world, so that difference is shrinking – and with less energy, the jet stream is slowing down.

    It used to blast straight east all the way around the planet, but even then it occasionally developed long S-shaped kinks called Rossby waves: big loops extending far north and south of its usual track. As it has slowed down (the average speed is now 150-225 kph), the Rossby waves have grown both more frequent and bigger.

    They are often now great loops deviating far north and south from the straight track, and those loops bring with them cold polar air rarely seen so far south, or warm air not seen previously so far north. That’s what happened to Texas last week: one of those Rossby waves brought cold Arctic air all the way south – and then stuck for a while.

    The jet stream itself didn’t stop. It just flowed all the way around that loop and kept going east, but the kink stayed put and the cold air in it froze Texas. This pattern will recur lots of times, and Texans will have to learn to live with it. Climate change doesn’t care whether you believe in it or not – and it may get worse...
    As Cicero said, “Gratitude is not only the greatest of virtues, but the parent of all the others.”

  2. #2
    Senior Member beckyliz's Avatar
    Join Date
    Jan 2011
    Location
    Topeka, KS
    Posts
    792
    Interesting! Thanks for that explanation.
    "Do not accumulate for yourselves treasures on earth, where moth and rust destroy and thieves break in and steal. But accumulate for yourselves treasure in heaven, where moth and rust do not destroy, and thieves do not break in and steal. For where your treasure is, your heart is also." Jesus

  3. #3
    Senior Member bae's Avatar
    Join Date
    Jan 2011
    Location
    Offshore
    Posts
    9,745
    Wait until the Gulf Stream collapses for some real climate fun!

    https://www.livescience.com/gulf-str...te-change.html

  4. #4
    Senior Member razz's Avatar
    Join Date
    Dec 2010
    Location
    Ontario, Canada
    Posts
    7,768
    Quote Originally Posted by bae View Post
    Wait until the Gulf Stream collapses for some real climate fun!

    https://www.livescience.com/gulf-str...te-change.html
    Very interesting. There is so much that the average person simply does not know about or little bits and pieces catch the media's attention about the jet stream and the Gulf stream. It is a challenge to explain the extensive contributing factors in terms that one can readily understand.
    As Cicero said, “Gratitude is not only the greatest of virtues, but the parent of all the others.”

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •