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Looking at earth.nullschool.net on 13.09.2021 you can see that the temperature above the Himalayas appear warmer than the surroundings (at 700 hPa):

enter image description here

At the surface it looks more like one would expect with lower temperatures than the surroundings:

enter image description here

I'm guessing the explanation is connected to the difference in elevation. And that for some altitudes, temperatures closer to the surface (but not at the surface) are higher. Still, the same effect is not to be seen in other mountain areas in Europe and North America:

enter image description here

Any suggestions?

vestland
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    When you check the 500 hPa map, you see distinct air movements from the west and southwest across the Himalaya range. So the slightly warmer air over the Tibetan plateau could be a result of adiabatic processes. – Erik Sep 13 '21 at 12:48
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    Heard of the Tibetan plateau and how it is warmer than simiar locations with comparable height ? –  Sep 13 '21 at 15:28
  • @gansub Thanks for the feedback! Would you care to quickly comment on why such questions are inappropriate for this sub? And no, I don't know why the Tibetan plateau is warmer. But I'd love to hear more about it! – vestland Sep 13 '21 at 15:32
  • @vestland First of all there is no forecast data available for 23rd September. –  Sep 13 '21 at 15:33
  • @gansub 23rd? I asked about 13th. Which is today. – vestland Sep 13 '21 at 15:34
  • @vestland No ! I changed the date from 23rd to 13th . Kindly check the edits. –  Sep 13 '21 at 15:35
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    @gansub Ah, sorry! Typo on my part. Thanks for the edit. The whole idea for writing up the date was to let people know that the images were from this particular date. – vestland Sep 13 '21 at 15:38
  • @vestland I withdrew my downvote. Here is a quick answer. The Tibetan plateau is a elevated plateau. The 700 hPa surface at that location is pretty much at the ground and not 3 kms above the surface. Given the elevated plateau there is a lot of sensible heating during the summer and this drives the monsoon circulation. –  Sep 13 '21 at 15:42
  • @gansub Thank you! Will this imply that the data available for the surface / Sfc option are all adjusted for elevation? Sorry if that's a ridiculois question. – vestland Sep 13 '21 at 15:48
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    @vestland The 850 hPa and isobaric surfaces below do intersect with the ground. Check my answer here on the Tibetan plateau - https://earthscience.stackexchange.com/questions/9246/easterly-jet-stream/9247#9247 –  Sep 13 '21 at 16:03
  • Great read! Thanks! – vestland Sep 13 '21 at 16:13

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