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X-WR-CALNAME;VALUE=TEXT:Harvard Climate Seminar: Lorenzo Polvani
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SUMMARY:Harvard Climate Seminar: Lorenzo Polvani
DESCRIPTION:<div>	<strong><a data-url="http://apam.columbia.edu/lorenzo-polvani" href="http://apam.columbia.edu/lorenzo-polvani" target="_blank" title="">Lorenzo Polvani</a></strong></div><div>	Professor of Applied Mathematics and Earth &amp; Environmental Sciences</div><div>	Columbia University</div><p>	<!--break--></p><p>	<strong>Why has the lower stratosphere stopped cooling for the last 20 years?</strong></p><p>	The cooling of the stratosphere is an important fingerprint of CO2 on the climate system.  This stratospheric signature of CO2, however, is confounded by the presence of ozone-depleting substances (ODS). The talk will summarize the latest observations and, with simple arguments and with the help of ensembles of chemistry-climate model integrations, demonstrate the crucial role of ODS not only on stratospheric temperature trends, but also on the entire large-scale circulation of the stratosphere.</p><p>	<drupal-media data-entity-type="media" data-entity-uuid="6ca6633b-b770-4071-8829-1780aca457b1" alt="Polvani_Image" data-view-mode="hwp_medium"></drupal-media></p>
LOCATION:HUCE MCZ 440
STATUS:CONFIRMED
DTSTART:20180207T170000Z
DTEND:20180207T170000Z
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