bjorn@climatemodeling.org

I study exchanges of carbon dioxide between the biosphere and atmosphere on regional scales using both present-day in situ measurements (flux towers), and paleo-proxies. I recently started work in Michael Dietze's ecological forecasting lab on some of the modeling activities for the PalEON project. The primary focus of this work is to generate an ensemble of common paleo-driver data for participating terrestrial ecosystem models in order to diagnose differences in model predictions and processes when confronted with data extending thousands of years into the past. Understanding model uncertainty using data based on past climate variability will help us to understand the uncertainty in future climate projections.

I also research present day carbon exchange primarily using global scale models to do regional inversions in the U.S. Mountain West. For this work I've used a variety of filtering methods and model adjustments in order to make greater use of atmospheric CO₂ mole fraction measurements during data assimilation. This work was done primarily as a post-doc in Ankur Desai's ecometerology lab at Wisconsin. There is still much to learn about the location and variability of the 'missing' CO₂ sinks in the terrestrial biosphere, and this work (model-specific filtering for data-assimilation) will be useful for determining locations and relative priorities of these sinks.

I also have a strong and ongoing interest in developing high performance computing signal processing applications for the earth sciences (see article), but also practical applications for students and young scientists (see chapter). These include using spectral analysis for data reduction, cycle period, synchronization, and signal filtering.

My other research interests involve a combination of geology and ecology and focus on questions of how biodiversity and disturbance interact and how well the two can be distinguished over geologic timescales (see article)