NLCs Setting Records

Posted: July 23, 2021 by oldbrew in atmosphere, Clouds, research, solar system dynamics

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NASA’s AIM Mission Overview says: ‘The primary goal of the mission is to determine why these night-shining clouds form. They are of special interest to scientists because the increased occurrence may be related to climate change.’ But it admits they’re ‘mysterious clouds’.
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Spaceweather.com

July 21, 2021: Noctilucent cloud (NLC) season is now 8 weeks old. This animation from NASA’s AIM spacecraft shows everything that has happened since the first clouds appeared in late May:

The last frame says it all: Noctilucent clouds are still bright and abundant. In fact, at the highest latitudes they are setting records.

“We’re seeing more clouds at 80°N than in any other year since AIM was launched,” says Cora Randall of the University of Colorado’s Laboratory for Atmospheric and Space Research. “Cloud frequencies at 80°N are around 85%, whereas it’s more typical to see frequencies of about 75%.” (‘Frequencies’ are a measure of patchiness. 100% is complete coverage; 0% is no clouds at all.)

“This morning, I watched a fantastic display, the best of the year so far ,” reports Marek Nikodem, who photographed the clouds from Szubin, Poland (53°N) on July 21st:

“It’s not the end of…

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Comments
  1. Duh, there are more clouds in polar and near polar regions when polar oceans are warm and thawed and promoting evaporation and snowfall on Greenland and Antarctica. This is documented in Ice Core Records.

    On Fri, Jul 23, 2021 at 4:23 PM Tallbloke’s Talkshop wrote:

    > oldbrew posted: “NASA’s AIM Mission Overview says: ‘The primary goal of > the mission is to determine why these night-shining clouds form. They are > of special interest to scientists because the increased occurrence may be > related to climate change.’ But it admits they’re ‘m” >

  2. Phil Salmon says:

    I love noctilucent clouds.
    As well as being beautiful, their increase shows that the atmosphere is cooling.

  3. Power Grab says:

    I really like their theme song, too!

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