<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi all,<div><br></div><div>Dr Phil Rasch from Pacific Northwest National Laboratory will be presenting us "Problems and Prospects for improved representation of aerosol impacts in climate models" on next Thursday, 13 February, "1:30 pm" in the "Mesa Lab Main Seminar Room".</div><div>At 12:00 pm, "before" the seminar, there will be a lunch with Dr. Phil Rasch in the ML cafeteria. Feel free to join!</div><div><br></div><div>Here are detailed information about his seminar. Hope to see all of you there!</div><div><br></div><div><br></div><div>Dr Phil Rasch, Chief Scientist for Climate Science, Pacific Northwest National Laboratory</div><div>Time: 1:30pm, Thursday, 13 Feb 2014</div><div>Location: ML - Main Seminar room</div><div>Title: Problems and Prospects for improved representation of aerosol impacts in climate models</div><div><br></div><div>Abstract:</div><div>
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<div class="column"><p>Aerosols are ubiquitous in the atmosphere, and play many roles in the<br>climate system, scattering and absorbing light, acting as nuclei for<br>liquid and ice particle formation (important to clouds properties), acting<br>as sites for photochemistry and as delivery agents for nutrients to<br>biological systems. A substantial fraction of aerosols are of<br>anthropogenic origin. Aerosols have been identified variously as: 1) one<br>of the most uncertain factors in historical climate change, increasing<br>uncertainty about Earthıs sensitivity to greenhouse gas concentration<br>changes, and 2) as "uncertain then, irrelevant now". In this talk I will<br>review some of the reasons why aerosol impacts are so difficult to<br>characterize, some recent attempts to improve their treatment in climate<br>models, discuss a few studies my group has been involved in recently, and<br>close contending that aerosols are "uncertain then, but not irrelevant<br>now".</p>
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</div></div><div><br></div><div><br></div><div><div>The Seminar Committee<br>(Fang Fang, Rajesh Kumar, Yumin Moon, Jorge Salazar, and Hyeyum Shin)</div></div><div><br></div></body></html>