Project at a Glance

Title: Mount Wilson GHG Monitoring Gas Sampling and Analysis

Principal Investigator / Author(s): Blake, Donald

Contractor: UC Irvine

Contract Number: 13-320

Research Program Area: Climate Change

Topic Areas: Greenhouse Gas Emissions


The California Global Warming Solutions Act of 2006 (AB32) established the goal of reducing the State's greenhouse gases (GHG) emissions to 1990 levels by 2020. In order to meet the requirement, AB 32 directs the California Air Resources Board (CARB) to develop appropriate regulations and establish a mandatory reporting system to track and monitor GHG emissions levels.

To support this effort, CARB has used ambient air GHG measurements collected at various locations throughout the state as part of the Statewide GHG Monitoring Network to understand the various emission sources, inform the regulatory programs, and track trends. While recent technologies have allowed measurements of some GHG (e.g., methane and nitrous oxide) unattended at remote stations, measuring high Global Warming Potential (high-GWP) gases still need to rely on labor intensive methods and instruments. This contract was aimed to measure the ambient concentrations of high-GWPs (e.g., HFC/CFC/HCFC) at the Mt. Wilson station to provide critical data to monitor the high-GWPs emissions and long term trends in Southern California.

This effort builds on a successful pilot study conducted in 2007 at the Mt. Wilson station to quantify F-gas emissions in Southern California using ambient air GHG concentration measurements. This contract conducted a similar campaign to quantify time-varying concentrations of greenhouse gas and related species at the Mt. Wilson station. The data collected will be used by CARB to assess and track the flux of GHG from emissions in Southern California.

For questions regarding this research project, including available data and progress status, contact: Research Division staff at (916) 445-0753

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