Jacob Hedelius

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Seoraksan National Park, S. Korea. Post TCCON meeting 2016.


Current appointment:

Postdoc in Debra Wunch's group at the University of Toronto.



Office Phone:416-946-0896

Email: jacob.hedelius 'at' utoronto "dot" ca

Office building: McLennan Physical Laboratories

University of Toronto

60 St George St

Toronto, ON M5S 1A7



Education: Ph.D. Chemistry, California Institute of Technology, 2017

B.S. Chemistry, Brigham Young University, 2012 

A.S General Studies, Snow College



EM27/SUN users:  

If you are another EM27/SUN user, I invite you to use EGI to help with processing your spectrometer data. This is an add-in, open-source software suite to help you run GGG2014. GGG is the software suite used to process spectra consistently across the TCCON, and is maintained by JPL. I have helped people from 6+ institutions so far use EGI/GGG. This software is hosted on the CaltechData archive (http://dx.doi.org/10.22002/D1.306) and bitbucket. The EGI wiki is a good place to start for instructions on installation/use and I am also happy to answer questions.

If you use EGI for publication I'd like to request you cite it (instructions here).



Caltech Graduate School Research (Chemistry department):  

My research is divided into multiple projects, and falls primarily under the carbon cycle side of the group.


I’ve recently worked on quantifying sources of errors in measurements of column averaged CO2 (XCO2) and other gases by low (0.5 cm-1) resolution solar-viewing spectrometers (EM27/SUN) [1].  These spectrometers are (easily) transportable and I have used them to empirically estimate bias among the CONUS TCCON sites [2]. I have also been a part of a campaign to estimate methane emissions from a dairy (~100,000 cows) using these spectrometers [3,4]. This is essentially done by combining upwind and downwind measurements with wind speed and a prior emission distribution map. In Oct-Nov 2016 I participated in a campaign with 6+ other institutions in the Bay Area with the goal to estimate CO2/CH4 fluxes from the area using a temporary network of these spectrometers.


I have also helped with projects to quantify carbon emissions from the South Coast Air Basin (SoCAB) and characterize how the total column enhancements behave. This has included a project involving ethane:methane ratios [5] to estimate fugitive processed natural gas emissions. A separate project I worked on focused on XCO2 variations in the SoCAB using TCCON, OCO-2, and modeled WRF data [6].


As a side project, I have looked at aerosol optical depth (AOD) behavior in Los Angeles. With UCLA, I have helped to maintain the AERONET sun photometer on campus for the last few years.





Megac ities Carbon Project - http://megacities.jpl.nasa.gov/portal/

Total Carbon Column Observing Network - https://tccon-wiki.caltech.edu/

           - https://en.wikipedia.org/wiki/Total_Carbon_Column_Observing_Network

Orbiting Carbon Observatory -2 - http://science.nasa.gov/missions/oco-2/


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