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Absolute minimum temperature?

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Absolute minimum temperature?

Old 5th Jan 2021, 07:59
  #41 (permalink)  
Join Date: Feb 2001
Location: The Winchester
Posts: 5,914
Originally Posted by TopBunk View Post
As an aside, I recall flying over Siberia in winter probably about 15 years ago.

We were in a B744 @ FL370 or so. The SAT outside was pretty much standard ISA at about -56degC, the temperature on the ground at Irkutsk (or wherever) was -57deg C!
Yup, Certainly looking at trop level on the Siberian charts some winters days it was clear you'd have to descend a heck of a long way before you saw the OAT increase. I've certainly seen the SAT rise by a degree or two as a result of a step climb when "up north" .
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