Environmental, Water Resources, and Coastal Engineering Seminar Series

Virtual seminar: https://ncsu.zoom.us/j/96075468552?pwd=RlZvb2x2YmM3c25KQWdRaXNEdVhUUT09

 An overview of California’s 2020 mobile source strategy in the off-road sector

Abstract: The California Air Resources Board (CARB) 2020 Mobile Source Strategy (MSS) is a strategy document that illustrates the technology mixes needed to reduce emissions from California’s transportation sector. This includes cars, trucks, trains, ships, aircraft, and all other on-road and off-road equipment. The MSS explores technologies for California to meet its various clean air goals including federal ambient air quality standards, community risk reduction, and ambitious mid- and long-term climate change targets. This presentation focuses on the control strategy in the off-road sector. Off-road covers a wide range of sectors including locomotives, ocean-going vessels, commercial harbor craft, construction and mining, lawn and garden, aircraft and many other industries. Off-road engines are significant sources of air pollutants such as nitrogen oxides (NOx), reactive organic gases (ROG), and diesel particulate matter (PM). Off-road has surpassed on-road vehicles as the largest source of statewide NOx emissions in 2017. As the regulations for off-road equipment tend to follow those for on-road vehicles by a few years, the relative contribution of emissions from off-road equipment is expected to continue to grow, absent additional controls.

Biography: Dr. Liu received her bachelor’s degrees in environmental science and Economics from Peking University in Beijing. She went on to receive her master’s and Ph.D. in Environmental Engineering from the University of Illinois. Her Ph.D. work focuses on air emissions from mobile sources and the overall health and climate impacts from freight transportation. Dr. Liu currently works for the California Air Resources Board (CARB) in the Mobile Source Branch, specifically in the Off-Road Diesel Analysis Section. Her work mainly includes development of off-road emission inventories and rule measures to support CARB’s air quality, public health, and climate goals.