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Tropical deep convection and tropical tropopause - Academia Sinica

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General behavior of the cloud<br />

• The updraft causes the cloud top layer to<br />

become unstable<br />

• A patch of the cloud material breaks off<br />

<strong>and</strong> penetrates into the stratosphere due<br />

to cloud top instability. It gradually<br />

spreads out <strong>and</strong> probably eventually<br />

dissipates.<br />

• The remaining cloud body “shrinks” back<br />

to the troposphere <strong>and</strong> oscillates about<br />

the LNB (~ 14-15 km).<br />

• The 14-17 km TTL layer also oscillates<br />

vertically. This oscillatory behavior has<br />

been observed before (e.g., Danielsen,<br />

1993).

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