Colloquia Fall 2014Spring 2014 | Spring 2015
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 atmos.colostate.edu] for more information.
Influence of the Basic State Zonal Flow on Convectively Coupled Equatorial Waves
December 12, 2014
Convectively coupled equatorial waves (CCEWs) represent the leading modes of synoptic scale organized convection in the tropical troposphere and they are known to affect weather in both the tropics and midlatitudes. Despite their promine...
Shortwave and longwave radiative contributions to global warming under increasing CO2
December 5, 2014
In response to increasing concentrations of atmospheric CO2, high-end general circulation models (GCMs) simulate an accumulation of energy at the top-of-the-atmosphere not through a reduction in out-going longwave radiation (OLR) as one ...
Recent advances in environmental monitoring using commercial microwave links
November 21, 2014
The propagation of electromagnetic radiation in the lower atmosphere, at centimeter wavelengths, is impaired by atmospheric conditions. Absorption and scattering of the radiation, at frequencies of tens of GHz, are directly related to th...
Global-scale convective self-aggregation and the Madden-Julian oscillation
November 14, 2014
The Madden-Julian Oscillation is the dominant mode of tropical intraseasonal variability, but exactly why it occurs remains poorly understood. In the first half of this talk I will argue that the MJO is a large scale consequence of a ten...
Radiative-Convective Equilibrium and its Instability: Implications for Weather and Climate
November 7, 2014
The concept of radiative-convective equilibrium (RCE) is the simplest and arguably the most elegant model of a climate system, regarding it as a statistically one-dimensional balance between radiative and convective heat transfer. In spi...
Analysis and Prediction of Clouds using Satellite All-Sky Radiances: Lessons Learned and Perspectives
October 24, 2014
The initialization of cloud parameters is one of the main frontiers for improving short-term prediction skills in numerical weather prediction (NWP) models. We will present the latest developments at the National Center for Atmospheric R...
Non-QG Sub-mesoscale ocean dynamics and a recent update from the Indian Ocean
October 17, 2014
Increased resolution in modeling and in observations in the ocean have revealed rich dynamics at O(km) lateral scales in the ocean associated with O(1) Rossby and Richardson numbers. These sub-mesoscale oceanic processes are very differe...
Distance Velocity Azimuth Display (DVAD) - New Interpretation and Analysis of Doppler Velocity
October 3, 2014
The concept and mathematic framework of the Distance Velocity Azimuth Display (DVAD) methodology is presented. DVAD uses rVd (Doppler velocity scaled by the distance from the radar to a gate, r) as the basis to display,...
Reducing Uncertainties in Two Significant Climate Forcers: Biomass Burning Emissions and Methane Leakage from Oil and Gas
Dr. Shane Murphy
September 26, 2014
The leakage rate from new oil and gas development in the U.S. is currently a matter of intense debate because the leakage rate affects how beneficial, from a climate perspective, switching from coal to natural gas is. Black carbon, for w...
Observations of Tropical Cyclone Eyewall Convective Structure and Forcing
September 19, 2014
Tropical cyclone (TC) eyewall convection plays a critical role in intensity change. Recent studies have suggested that the radial location of eyewall convection relative to the radius of maximum wind is an important component of intensif...
Land-Use and Land-Cover Change Impacts on Regional Climate
September 12, 2014
Land-Use and Land-Cover (LULC) change is a forcing factor that is of importance to regional climate. However, LULC change impacts exhibit substantial geographical variation and complex interactions with other forcing factors. This talk w...
Convective initiation and hydrometeorological influence of extreme storms in subtropical South America
Kristen L. Rasmussen
September 5, 2014
Extreme convection tends to form in the vicinity of mountain ranges, and the Andes in subtropical South America help spawn some of the most intense convection in the world. An investigation of the most intense storms for 11 years of TRMM...
The Benefits of Coupling to a Mixed-Layer Ocean for Global Climate Simulations
August 27, 2014
Prescribing sea-surface temperatures (SSTs) in atmosphere-only model simulations is known to produce erroneous relationships between SSTs, surface fluxes and precipitation. These errors cause biases in representations of the mean climate...
Fine particulate matter in China: current understanding and challenges
Professor Mei Zheng (visiting ATS from Peking University)
August 21, 2014
Land-surface and hydrological modeling at the cloud-scale, implications for super-parameterization
Parker Kraus, Colorado State University
August 4, 2014
NASA's Northern Colorado Global Climate Change Education Initiative
Renee Curry, Colorado State University
August 4, 2014
Effects of wildfire pollution on the microphysical and electrical properties of pyrocumulus
Renee Duff, Millersville University
July 31, 2014