Dr. Meiyun Lin (Princeton University/CICS Scientist)
Office: 250 GFDL Tel: (609) 452-6551 Email: meiyunl at princeton.edu
Meiyun Lin is a research scientist at NOAA and Princeton University's Cooperative Institute for Climate Science (2010-present). Lin's research seeks to advance knowledge on the interactions of air quality with weather and climate. Specifically, she investigates how climate variability & change affect the long-range transport of Asian pollution, intrusions of stratospheric ozone deep into the troposphere, and their impacts on western US ozone air quality. Focusing on these research themes, Lin's work has led to a stream of high-profile publications. The US Environmental Protection Agency is proposing to lower the National Ambient Air Quality Standard (NAAQS) for ground-level ozone from 75 to 65-70 ppbv. Process-level understanding on daily to multi-decadal time scales is thus relevant for effective implementation of the ozone standard in western states. Meiyun Lin is also an investigator of the NASA Aura Sciences Team in Atmospheric Composition and the NASA Air Quality Applied Sciences Team. Lin earned her Ph.D. from the University of Tokyo (2007) and completed her postdoctoral work at the University of Wisconsin-Madison (2008-2010).
Citations: | | GFDL Bibliography
RECENT PUBLICATION HIGHLIGHTS!
> Article by Meiyun Lin et al. in Nature Geoscience
> Nature Geoscience News & Views
Tropospheric ozone is a greenhouse gas, biological irritant, and significant source of highly reactive hydroxyl radicals. The response of tropospheric ozone to changing atmospheric circulation is poorly understood. This paper shows that over the past four decades, shifts in atmospheric circulation have played a key role in the autumnal ozone increase and the absence of spring ozone change over Hawaii by modulating pollution transport from Asia. This finding implies a need to consider decade-long variability in climate when detecting and attributing trends in tropospheric ozone levels to changes in human-induced emissions.
PDF Full Text | Supplemental Information
Publicity: Princeton Journal Watch | ScienceDaily | other media outlets
> Article by Meiyun Lin et al. in J. Geophys. Res.
Current guidelines from the U.S. Environmental Protection Agency (EPA) dictate that surface-level air should have no more than 75 ppbv of ozone for 8-hour average. Lin et al  find that intrusions of ozone from the stratosphere can episodically increase surface ozone levels by 20-40 ppbv, pushing observed ozone to exceed the health-based limit at western U.S. high-altitude regions during spring. This finding suggests that stratospheric influence may pose challenges for western states to achieve more stringent ozone air quality standards if such "exceptional events" beyond the control of domestic air agencies are not properly screened out.
PDF Full Text | Supplemental Information | Visualization
Publicity: JGR most popular articles; US House Environmental Hearing;
>Article by Meiyun Lin et al. in J. Geophys. Res.
As Asian countries develop, they are emitting more ozone precursors that pollute surface-level air. The authors find that Asian pollution can contribute as much as 20% of total ozone during springtime pollution episodes observed in western U.S. surface air. They suggest that we could use NASA satellite observations of carbon monoxide to predict when incoming plumes of polluted air might affect western air quality, one to three days ahead of time. (Read more...)
PDF Full Text | Supplemental Info | Visualization
Publicity: Science Magazine ; Nature News; AGU Editors' Highlight
JGR's top 1 most cited article in year 2012