California Air Resources Board

Principal Investigator/Author: Zhao-Cheng Zeng, Stanley P. Sander

Contractor: University of California, Los Angeles

Contract Number: 17RD030

Project Status: Completed

Relevant CARB Programs: Climate Change, California Greenhouse Gas Emissions Inventory Program

Topic Areas:  Greenhouse Gas Inventory

Research Summary:

This project aimed to (1) extend the California Laboratory for Atmospheric Remote Sensing Fourier transform spectrometer (CLARS-FTS) data record for 2.5 additional years; (2) process the CLARS-FTS spectra to obtain dry air slant column abundances and mixing ratios of the key greenhouse gases methane (CH4) and carbon dioxide (CO2), as well as carbon monoxide (CO), nitrous oxide (N2O), water vapor and O2 (used for filtering the effects of aerosols and clouds); and (3) calculate spatially and temporally-resolved CH4 emissions. This project provides CH4 emissions data from late 2011 through the end of 2020.

Keywords: greenhouse gas, methane (CH4), carbon dioxide (CO2), nitrous oxide (N2O), carbon monoxide (CO), emissions, emissions reduction strategies, atmospheric remote sensing, Los Angeles basin