Opportunity at National Institute of Standards and Technology (NIST)
Frequency Combs for the Remote Sensing of Agricultural Gas Emissions
Physical Measurement Laboratory, Applied Physics Division
Please note: This Agency only participates in the February and August reviews.
|Brian Richard Washburn
Open path dual-comb spectroscopy (DCS) has been shown as a powerful tool for determining greenhouse gases emissions in urban areas  and oil/gas production regions . We have recently shown that DCS can be used to precisely measure gas emissions from an agricultural setting . Agricultural activities are significant sources of methane, ammonia, and nitrous oxide and DCS offers the ability to simultaneously measure multiple gases in a field environment. Not only is this indispensable for testing gas mitigation strategies, but for several agricultural science areas such as crop breeding and crop nutrient efforts. In collaboration with a world-class team of optical and agricultural scientists, our work will extend DCS to agricultural systems where point-sampling-based approaches are insufficient, presenting opportunities for field-scale biogeochemical studies and ecological monitoring.
1. E. M. Waxman et al., Estimating vehicle carbon dioxide emissions from Boulder, Colorado, using horizontal path-integrated column measurements. Atmospheric Chem. Phys. 19, 4177–4192 (2019).
2. S. Coburn et al., Regional trace-gas source attribution using a field-deployed dual frequency comb spectrometer. Optica. 5, 320–327 (2018).
3. D.I. Herman et al., Precise multispecies agricultural gas flux determined using broadband open-path dual-comb spectroscopy, Sci. Adv. 7, eabe9765 (2021).
Fiber optics; Frequency comb; Nonlinear optics; Spectroscopy; Supercontinuum; Dual comb Spectroscopy; Ultrafast Optics; Agricultural gas measurements; Agriculture;
Open to U.S. citizens
Open to Postdoctoral applicants