Lecture13-Boundarylayer

Lecture13-Boundarylayer - ‐ convective equilibrium:

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MPO 551: Lecture 13 Atmospheric Boundary Layer (Chapter 9, Wallace and Hobbs)
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Marine boundary layer clouds: The dominant cloud type globally Large optical thickness : cool planet by 15 W/m2 Occur in regions of statically stable lower troposphere (i.e. cool SST Surface based observations
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What are stratocumulus there? Buoyancy driven mixing by convective instability (when lifting a layer adiabatically can cause a stable layer to be unstable) . Criterion is:  e z 0 HEATING FROM BELOW COOLING FROM TOP
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From the North Sea (Wood 2011,
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Longwave Radiation Near the top of the cloud, the upward and downward radiation are about equal More downwelling IR within the cloud layer reduces the flux divergence over the layer Note: a very useful post on rad
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Unformatted text preview: ‐ convective equilibrium: http://www.gfdl.noaa.gov/blog/isaac ‐ held/2011/10/26/19 ‐ radiative ‐ convective ‐ equilibrium/#more ‐ 3525 What are stratocumulus there? Cooling maintains inversion, which prevents entrainment of dry air which helps maintain the cloud layer Cloud observations – Current video from RSMAS: http://www.rsmas.miami.edu/users/pzuidema/CA ROb/ – Skew ‐ T from Miami airport – Cloud coding (Schumacher) – Pictures to help with cloud coding: http://australiasevereweather.com/techniques/m oreadv/class.htm People are better at observing low ‐ frequency cloud changes Clement, Burgman, Norris (2009) S. Yuter...
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This note was uploaded on 01/08/2012 for the course MPO 551 taught by Professor Zhang,c during the Summer '08 term at University of Miami.

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Lecture13-Boundarylayer - ‐ convective equilibrium:

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