Dave Johnson

Title: Innovations by Dave Johnson in Gas Flux Measurement

Introduction

Dave Johnson is an accomplished inventor based in Lincoln, NE (US). He has made significant contributions to the field of gas flux measurement, holding 2 patents that showcase his innovative approach to environmental monitoring.

Latest Patents

Johnson's latest patents focus on methods and apparatus for measuring gas flux. These systems utilize high-speed vertical wind speed measurements, operating at frequencies of 5-10 Hz or more, alongside low-speed gas content measurements, which operate at 5 Hz or less. His inventions eliminate the need for sophisticated and expensive high-speed hardware to separate gas samples based on updrafts and downdrafts. By employing a time series of high-speed vertical wind speed data, Johnson's methods effectively distinguish between updrafts and downdrafts. When the vertical wind speed indicates an updraft, the low-speed gas content is recorded in one location, marked with a specific flag. Conversely, during a downdraft, the gas content is recorded in a different location, marked with another flag. This innovative approach allows for the application of Eddy Accumulation or Relaxed Eddy Accumulation computations to determine gas flux accurately.

Career Highlights

Dave Johnson is currently employed at Li-Cor, Inc., where he continues to develop and refine his innovative technologies. His work has significantly advanced the understanding and measurement of gas flux in various environmental contexts.

Collaborations

Johnson collaborates with notable colleagues, including George G. Burba and Dayle K. McDermitt, who contribute to the research and development efforts at Li-Cor, Inc.

Conclusion

Dave Johnson's contributions to gas flux measurement through his innovative patents reflect his commitment to advancing environmental science. His work not only enhances measurement techniques but also supports broader environmental monitoring efforts.