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Foehn wind

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Old 9th Aug 2016, 20:59
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Foehn wind

Can anyone explain why the rate of dry warming jumps to 2 degrees per 200m at 2800m?

Isn't the dry adiabatic lapse rate a consistent 1.33c per 200m?
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Old 10th Aug 2016, 08:55
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Can anyone explain why the rate of dry warming jumps to 2 degrees per 200m at 2800m? Isn't the dry adiabatic lapse rate a consistent 1.33c per 200m?
The DALR is 2º/200m. 1.33º/200m is the 'standard' lapse rate.
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Old 10th Aug 2016, 16:43
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So why does it increase at a rate of 1º/200m from the top on the right 4400m? Surely this is the DLR as well (since the air is dry) and the DLR should remain consistent?
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Old 10th Aug 2016, 19:17
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What he said ^^^^
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Old 11th Aug 2016, 07:07
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Your last thread had the lapse rates in imperial, studying in both will not help, keep to what the exams are in (I presume they are not in both!).
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Old 11th Aug 2016, 20:43
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Altitude in feet, speed in knots, distance in nautical miles, runway length in metres, temp in Celsius? And C of G calculations?
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Old 11th Aug 2016, 23:54
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When I said not in both I really meant for any particular subject, yes conversions are actually part of the sylabus, but I would think lapse rates are only tested in one regime!
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Old 12th Aug 2016, 21:19
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Thanks foxmoth. The bit I hadn't realised was that it is still saturated for a while on the leeward side!

I wasn't looking to study in both, but I wanted a video to help understand, and that was the measurement they used.
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Old 14th Aug 2016, 11:17
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Thanks foxmoth. The bit I hadn't realised was that it is still saturated for a while on the leeward side!
Correct, though of course containing less moisture as it has dropped some as precipitation as it goes over the mountains and is why it is a "warm" wind.
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