Department of Atmospheric and Oceanic Sciences, University of Colorado

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Oceanography at CU

ATOC Seminar Schedule

LOCATION: Most seminars will be held in the Physics Commons Room at the top of Gamow Tower, Duane Physics Building. Some seminars will be held in the LASP Conference Room, Duane Physics Building, D-142, due to prior scheduling conflicts with Gamow Tower. See the Google Calendar above for the location of each seminar.

DAY/TIME: Seminars will be held on Fridays, 4-5 pm, unless otherwise noted.

ATOC 2008 Seminar Quick-Look: (see Google calendar above for details such as locations, times, titles, and abstracts):

February 8: no seminar - CIRES Distinguished Lecture Series, Mark Jacobson, Stanford University
February 15
Speaker: Katja Friedrich, ATOC
Title: "Quantitative estimation of convective and orographically-induced precipitation"
Abstract: The accurate prediction of formation and evolution of precipitation and outbreak of severe weather still remains a forecasting challenge. Over the years, remote sensing instruments in particular Doppler weather radars have been intensively used to investigate and monitor kinematic and thermodynamical processes relevant to cloud formation, enhancement of precipitation, and outbreak of severe weather within thunderstorms and along atmospheric boundaries. This presentation will give a short overview about present radar technologies and how they are applied to investigate precipitation formation and deriving precipitation amounts showing results from four field campaigns. Vertical transport and precipitation development are investigated within orographically-forced thunderstorms during the vertical exchange and orography project (VERTIKATOR) conducted in the northern Alps and during the convective Convective and Orographically Induced Precipitation Study (COPS) in the Black Forest, Germany. The goal was to study kinematic and thermodynamical structures within convective systems in mountainous terrain to improve forecast of atmospheric flow and precipitation. Boundary layer convergence zones (or boundaries) have long been known to be key factors in convection initiation and evolution. The influence of wind shear instabilities along gust front and cold front boundaries were investigated during the Convection and Precipitation/Electrification (CaPE) project in Florida and International H2O project (IHOP) in Kansas. The second part of the presentation focuses on implementing some of the results into operational weather forecasting. The presentation addresses the utility and feasibility of radar polarimetry for improving quantitative precipitation estimation and forecast in mountainous terrain, the usage of radar-based rain fall rates for hydrological purposes as demonstrated during the Mesoscale Alpine Programme - Demonstration of Probabilistic Hydrological and Atmospheric Simulation of flood Events in the Alpine region (MAP-DPHASE), and the usage of wind information for the onset and duration of orographic precipitation.
February 22: Ru-Shan Gao, NOAA
February 29: Roger Pielke, Sr., ATOC
March 7: Betsy Weatherhead, NOAA/CIRES
March 14: Joan Alexander CoRA
March 21: Brian Kahn, JPL
March 28: no seminar (spring break)
April 4: no seminar - CIRES Distinguished Lecture Series, Kerry Emanuel
April 11: Lansing Madry, ATOC
April 18: Andrew Gettleman, NCAR
April 25: Roger Pielke, Jr., Center for Science and Technology Policy Research, CU-Boulder
May 2: Karen Rosenlof, NOAA CSD

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ATOC, UCB 311, University of Colorado
Boulder, CO 80309-0311, (303) 492-7167
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