Jacob Hedelius

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


Graduate Student 

Department: Chemistry  


Office: 121 Linde + Robinson 

Office Phone: 626-395-2059 

Email: jhedeliu 'at' caltech 'dot' edu 

Mailing Address:  

California Institute of Technology
1200 E. California Blvd., MC 131-24 
Pasadena CA 91125


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

B.S. Chemistry, Brigham Young University, 2012 

A.S General Studies, Snow College



I recently graduated from Caltech and I am working as a temporary postdoc until Sept. In Oct. I will begin as a postdoc in Debra Wunch's group at the University of Toronto.


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.


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 aide you in running 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. If you are interested, please contact me and I will send you instructions.



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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