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Colloquia Fall 2009

Spring 2009 | Spring 2010

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.

Stratospheric circulation impact on composition and structure of the tropopause region

Thomas Birner (CSU)
December 10, 2009

The stratospheric circulation (often referred to as Brewer-Dobson circulation) is a mechanically driven global scale circulation that transports mass and constituents (e.g. ozone and water vapor) from the cold tropical tropopause to the ...

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The 8 May 2009 "Super Derecho": A Land-Hurricane?

Morris Weisman (NCAR)
December 3, 2009

During the morning of 8 May, 2009, a large bow echo system developed over Kansas and proceeded eastward, producing an extensive swath of severe wind damage from eastern Kansas through southern illinois. During its most intense phase, the...

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Understanding Avalanches: A Theoretical Framework and Practical Approach

Ethan Greene (CO Avalanche Info Center)
November 19, 2009

Avalanches are significant natural hazards that affect people living in and traveling through most mountainous regions of the world. In Colorado, avalanches kill more people annually that any other natural hazard. Avalanches also have a ...

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Nonequilibrium Statistical Mechanics and Climate Variability

Jeff Weiss (UC Boulder)
November 12, 2009

The variability of climate features has significant human impacts but is difficult to model and predict. Recent theoretical developments in nonequilibrium statistical mechanics cover a class of simple stochastic models that are often use...

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Evaluation of U.S. NOx emissions with satellite-based observations and model simulations

Greg Frost (NOAA)
November 5, 2009

Nitrogen oxides (NOx = NO + NO2) of anthropogenic origin are produced primarily from fossil fuel combustion by motor vehicles, electrical power generation, and industrial processes. Accurate accounting of NOx emissions is crucial for the...

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Dinosaur forecast: cloudy, and other lessons from past warm climates

Eli Tziperman (Harvard)
October 30, 2009

The geologic record is a fascinating source for surprising information on past warm climates. The climate of the Cretaceous and Eocene (146-34 Million years ago) was exceptionally warm. Crocodiles and
Palm trees, which cannot survive a ...

No Video

Multispectral aerosol optical depth retrievals from high-resolution satellite imagery

Phil Durkee (Naval Postgraduate School)
October 15, 2009

(with contributions from Kurt Nielsen, Nick Vincent, Jack Evans, Ryan Dombrock, Brian Rivenbark, and Brian Belson)

The advancement and proliferation of commercial high-resolution imaging satellites presents a new opportunity for overl...

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A look back at the changes in Meteorology (Atmospheric Science) since the early 1950's

Bill Gray (CSU)
October 8, 2009

This talk discusses the large changes in the ideas and the practice of meteorology (and atmospheric science) since I entered the field in the early 1950s. The dominant change has been the evolution of technology (computer, satellite, etc...

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Studying the MJO and tropical waves through data assimilation

Brian Mapes (Univ of MiamI)
September 22, 2009

The Madden-Julian oscillation is a robust, well-observed, and easily resolvable (large scale) phenomenon that global atmosphere models are notoriously poor at simulating. Analysis tendencies (ATs) in data assimilation can be interpreted ...

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Arctic Climate Change and Sea Ice Decline

Ted Scambos (NSIDC)
September 17, 2009

A profound change is underway in the thin but climatologically critical ice cover of the Arctic ...

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100 Views of Climate Change

John Calderazzo & SueEllen Campbell (CSU)
September 10, 2009

The great woodblock artist Hokusai looked at Japan's Mount Fuji from almost every perspective imaginable-up close and far away, as weather-catcher, spiritual inspiration, the one seemingly solid point in a roiling seascape. He called hi...

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Our war with Climate

Michael Glantz
September 3, 2009

Societies have been at war with their climate regimes, most likely since the beginning of humankind. They had to devise ways to find or make shelter appropriate to their local climates, find and store foods for long periods on time acros...

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NOAA cloud product algorithm development for the next generation GOES-R and NPOESS satellite observing systems

Andrew Heidinger (SSEC/Univ of Wisconsin)
August 27, 2009

The NOAA fleet of meteorological satellite imagers is undergoing a major transition. The GOES-R Advanced Baseline Imager (ABI) and the NPOESS Visible Infrared Imager Radiometer Suite (VIIRS) will be launched soon and both offer new capa...

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