<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi all,<div><br></div><div>The next asp seminar by Dr. Phil Rasch will take place tomorrow, 13 February, "1:30 pm" at the "ML Main Seminar Room".</div><div>"Before" the seminar, at "12:00 pm" at the "ML cafeteria", the lunch with Dr. Phil Rasch is scheduled. Feel free to join!</div><div><br></div><div>Dr. Phil Rasch serves as the Chief Scientist for Climate Science at the Pacific Northwest National Laboratory (PNNL). He was an ASP Graduate Fellow and also ASP Postdoctoral Fellow at NCAR, and worked as a scientist in various positions at CGD/NCAR until 2008. He joined PNNL in 2008 as the Chief Scientist. </div><div><br></div><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: 1:30 pm, 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><div class="page" title="Page 1"><div class="layoutArea"><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></div></div></div></div><div><br></div><div><br></div><div>The Seminar Committee<br>(Fang Fang, Rajesh Kumar, Yumin Moon, Jorge Salazar, and Hyeyum Shin)</div></div></body></html>