Renowned Scientist to Give Seminar on Measuring Atmospheric Turbulence

Date: 07-11-2013

Sarah Langford
Public Affairs
Shane Mayor
Geological and Environmental Sciences

Danish scientist Jakob Mann, a respected authority on atmospheric physics, will give a seminar on wind turbulence at California State University, Chico on Tuesday, July 16, at 9 a.m. 

Jakob MannMann, a wind energy professor at the Technical University of Denmark, is known in his field for developing a model now used with lidar technology, which operates similarly to radar technology, but uses light waves instead of microwaves. He will lead a discussion that answers the question, “How can Doppler lidars measure turbulence in the lowest part of the atmosphere?” 

Published in the “Journal of Fluid Mechanics” in 1994, Mann’s spectral velocity tensor model has been used to describe the turbulent inflow to wind turbines in order to calculate the dynamic loads. Most recently, the model has been used to describe the difference between turbulence measured with lidars and that measured with ordinary instruments. During the seminar, he will present ideas on how to improve the lidars’ ability to measure turbulence.

Mann’s visit corresponds with a wind research project headed by CSU, Chico geoscience professor Shane Mayor. The research uses a special infrared lidar at the University Farm to gather data on atmospheric boundary layers and vector wind fields. The Atmospheric Lidar Research Group is supported by a three-year, $729,000 grant from the National Science Foundation and builds upon previous research led by Mayor.

While on campus, Mann will tour the wind-sensing field project and explore possible paths for collaboration with the research team.

“Jakob is a world authority on using lidars to measure wind, and a world expert in working on turbulence,” Mayor said. “It’s a real honor to have him visit our campus.”

The seminar will be held in Room 202 in the Physical Sciences Building (PHSC).