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Colloquia Fall 2012

Spring 2012 | Spring 2013

Colloquia are held in ATS room 101; Discussion will begin at 3:30pm. Refreshments will be served at 3:00pm in the coffee lounge. Please contact Thomas Birner [thomas at] for more information.

Sea Ice and Consequences of an Ice-Diminished Arctic Ocean

Julienne Stroeve
December 13, 2012

The Arctic is currently undergoing rapid environmental changes. Over the past few decades, the Arctic has warmed at about twice the rate as the rest of the planet. As a result, significant changes are happening in the Arctic sea ice cove...

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Climate Science Education, Outreach, and Diversity at CMMAP

Scott Denning
November 29, 2012

CMMAP is one of 17 NSF Science and Technology Centers, developing and using multiscale models to better understand the climate system. A crucial part of every STC is to enhance education, engage external audiences about the research, and...

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Entrainment in Stratocumulus

Hermann Gerber
November 15, 2012

We know that stratocumulus clouds (Sc) contribute significantly to the Earth’s radiation budget and thus must be understood for predicting climate change. This talk looks at relatively recent Sc measurements (POST; Physics of Stratocum...

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The influence of low-frequency variability on the life cycles of high-impact weather during the winters of 2009-2011: simulations, predictions and observations

Mel Shapiro
November 8, 2012

It has been widely noted that the anomalously extreme weather events of the recent winter seasons coincided with large-amplitude sub-seasonal to seasonal anomalies, particularly in the arctic modes of variability, i.e., Northern Annular ...

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Reforecasts: what are they good for? Using multi-decadal reforecasts from the NCEP Global Ensemble Forecast System

Thomas M. Hamill
November 1, 2012

Reforecasts, or hindcasts, are retrospective numerical forecasts, ideally from the same model and data assimilation system that is used operationally. We have recently created a reforecast data set for the NCEP medium-range global ensemb...

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The COMET Program's Support of University Education

Liz Page
October 25, 2012

For over 20 years, COMET has engaged in a variety of educational activities in an effort to build a bridge between the academic and operational meteorology communities. With computer-based training, classroom courses, and support of oper...

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The Science of Tornado and Lightning Chasing

Tim Samaras
October 18, 2012

For the past 20 years, Samaras has combined his technical expertise to his passion of chasing storms to collect first-ever data and images from tornadoes and lightning. He will share the techniques he uses, some of the data he has collec...

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Colorado's Water History, Rights & Allocation System: A Climate-Driven System

Tom Cech
October 11, 2012

In 1859, gold was discovered along Cherry Creek in Denver, and set in motion an epic transformation of Colorado and the West. The "Great American Desert" soon became an irrigated garden of abundance, in spite of climatic challenges. In 1...

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The Detailed Structure of the LaGrange, Wyoming Tornado Observed during VORTEX2

Roger Wakimoto
October 4, 2012

One of the most ambitious field projects organized to study tornadoes and tornadic storms occurred during the spring and summer of 2009/2010 (VORTEX2 - Verification of the Origins of Tornadoes Experiment). A number of mobile platforms we...

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Long-lived Rossby wave trains as precursors to strong winter cyclones over Europe

Prof. Volkmar Wirth
September 26, 2012

The statistical connection between strong surface cyclones over Europe and long-lived upper-tropospheric Rossby wave trains is examined for the Northern Hemisphere winter season using 45 years of reanalysis data. Dates are selected for ...

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Climate change and recent climate extremes: The Russian Heat Wave of 2010

Kevin E. Trenberth
September 6, 2012

Following a discussion on the framing of how climate extremes relate to climate change, an examination will be given of a number of large impact climate extremes that occurred in 2010 and 2011. The main focus is on the Russian heat wave ...

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Deep Ocean Circulation Changes as the Primary Driver for Global Climate Change

Dr. William Gray
August 30, 2012

An important process with regards to climate change is the prevalence of multi-decadal periods of fluctuations in both global and local temperature, precipitation, and other climate elements. The usual period of these variations is abou...

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Faculty Intro Jamboree

Profs. Birner, Denning, Johnson, Kreidenweis, Kummerow, O'Dell, Robinson, Schumacher, Thompson
August 23, 2012

Profs. Birner, Denning, Johnson, Kreidenweis, Kummerow, O'Dell, Robinson, Schumacher and Thompson provide overviews of their research areas and groups in the department.

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