The difference between surface and 1000mb geopotential height
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@vujacicm said in The difference between surface and 1000mb geopotential height:
850mb 17 Celzius
850hPa is not 9000m, only 1500m !
By the way, here we are on the forum community of windy.com. So why all your posts show screenshots from another weather app ?! -
@idefix37 Mounth Everest is 9000m height. How can there be 850mb on 1500m?
On Windy is simillar
Surface -5
850mb 20
On Meteoblue I can show the temperature on the point, on Windy I can only show temperature with colours.
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@vujacicm
See what is the vertical structure of the grid points in a weather modelhttps://community.windy.com/topic/5014/windspeed-and-direction-different-heights/2?_=1724610259822
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@vujacicm
In Windy, you can see precisely the temperature of a point.
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@idefix37 I am to slow with screenshot. It's gone, before I scan.
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@idefix37 You are showing me the winds. What about temperature? Does 20 degress on 850mb still cross surface of Mounth Everest?
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@vujacicm
The winds ? The title of my screenshot is Temperature and -7°C is not a wind speed ! -
@idefix37 This, what you give me, is about winds
https://community.windy.com/topic/5014/windspeed-and-direction-different-heights/2?_=1724610259822
I see that understanding geopotential height is not easy, that's reason, why a lot of questions.
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@vujacicm
I should have only shown this graph.
It should allow you to understand what is the temperature at 850hPa above Mount Everest.
Note also there is sometime a big difference between the real elevation and the model elevation. -
@idefix37 So, model elevation shows that there is 18 Celzius let's say 500m above Mount Everest surface?
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In the mountains, global models are wrong because their orography model is too coarse compared to the reality of the terrain.
It is exactly what @Gkikas-LGPZ explained to you in his post here Bové
You should therefore not try to focus on high mountains with global models. -
@idefix37 What I see on 850mb, I can say that on that level the surface of this mountain is adiabaticaly heated on this level. If this is not true, then is really just wrong, how you say.
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@idefix37 It looks like you are right, if geopotential is lower then mountain, it will not show right
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@idefix37 Situation is like this. I live in area, where mountains around are lower then 3000m. So, I can only use surface or 700mb geopotential. Lower will show wrong.
