<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Hi all,</div><div><br></div><div>Just a reminder about the ASP seminar today.</div><div>Thanks!</div><div><br></div><div>The Seminar Committee<br>(Fang Fang, Rajesh Kumar, Yumin Moon, Jorge Salazar, and Hyeyum Shin)</div><div><br></div><div>---------------------------------------------------------------------------------------------------------</div><div><div><br></div><div>The APS seminar by Dr. Phil Rasch will take place "TODAY" 1:30 pm in the ML Main Seminar Room.</div><div>"Before" the seminar, at 12:00 pm in 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). </div><div>He was an ASP Graduate Fellow and also ASP Postdoctoral Fellow at NCAR, </div><div>and worked as a scientist in various positions at CGD/NCAR until 2008.</div><div>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 Earth's 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><br></div></div></div></div></div></div></div></body></html>