Environmental Science 7899 – Issues in Environmental Sciences
Watch the live seminar remotely via CarmenConnect
Seminar Chair: Gil Bohrer, bohrer.17@osu.edu
Seminar Coordinators: Michelle Smith, straley.23@osu.edu; Yanting Guo, zhao.1093@osu.edu
Course Requirements
This course is graded S/U. Satisfactory participation in this course includes all of the following:
- Attentive and active participation in lectures and discussion.
- Attendance at all classes, with one excused absence. If you must miss more than one class, see Dr. Bohrer.
- Advance reading for any seminars for which it is required
Modeling the emission, chemistry, and dispersion of Biogenic Volatile Organic Compounds (BVOC) and their reactant products
By William Kenny
We have been working to develop a new post-processing model - High resolution VOC Atmospheric Chemistry in Canopies (Hi-VACC) - which resolves the dispersion and chemistry of reacting chemical species given their emission rates from the vegetation and soil, driven by high resolution meteorological forcing and wind fields from various high resolution atmospheric regional and large-eddy simulations. Hi-VACC reads in fields of pressure, temperature, humidity, air density, short-wave radiation, wind (3-D u, v and w components) and sub-grid-scale turbulence that were simulated by a high resolution atmospheric model. This meteorological forcing data is provided as snapshots of 3-D fields. We have used the advection-diffusion component of the model for various applications on a number of RAMS-based Forest Large Eddy Simulation (RAFLES) runs. Here, we present results from utilizing Hi-VACC in a few different contexts where it performs scalar dispersion well. These include simulations of smoke dispersion from a theoretical forest fire in a domain in The Pine Barrens in New Jersey, as well as simulations to test the effects of heat flux on a scalar plume dispersing over a vegetative windbreak in an agricultural setting, and in a lake-flux scenario. Additionally, we show initial results from testing the coupled chemistry component of Hi-VACC. We are curently working on investigating the effects of canopy heterogeneity vs. BVOC emission heterogeneity on the ultimate flux of reacting species from the canopy.
William is a 5th year PhD student of Gil Bohrer's studying biosphere-atmosphere interactions. Particularly, he works on modeling the emission, dispersion, and chemistry of BVOCs and their reaction products. He was awarded a NASA Earth and Space Science Fellowship for 3 years of his graduate career and has presented oral and poster presentations at many conferences.
