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Mt. Bachelor Observatory, September 2012
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 Group News : Pao Baylon and Crystal McClure publish new papers
Posted on 2014/9/22 12:20:00

Two new papers from the Jaffe Group have been accepted for publication!

Pao Baylon's paper titled "Ozone enhancement in western US wildfire plumes at the Mt. Bachelor Observatory: The role of NOx" will be published in Atmospheric Environment.
Find the paper here.

Crystal McClure's paper titled "Evaluation of the KCl Denuder Method for Gaseous Oxidized Mercury using HgBr2 at an In-Service AMNet Site" will appear in Environmental Science & Technology.
Find the paper here.

 Group News : Crystal McClure does research in China
Posted on 2014/9/8 11:50:00

"Getting to spend time in China and learn both scientifically and culturally was an opportunity of a lifetime," says Crystal McClure in summing up her recent months in China. As an East Asia and Pacific Summer Institute (EAPSI) fellow, she spent the summer in Beijing working with Dr. Shuxiao Wang at Tsinghua University. She studied oxidized mercury species emitted from coal-fired power plants. In addition to her research, she traveled around China with 39 other US EAPSI scientists and experienced many of the sights and tastes of China.

At left: Some of the US students on a weekend trip to Zhangjiajie

 Mt. Bachelor Observatory : Jaffe Group presents papers at Mountain Sites Symposium
Posted on 2014/9/4 14:30:00

In August Pao Baylon, Jonathan Hee, and Dan Jaffe presented papers at the 2014 Symposium on Atmospheric Chemistry and Physics at Mountain Sites, sponsored by Storm Peak Laboratory and held in Steamboat Springs, CO.

Pao's presentation was titled "Ozone enhancement in wildfire plumes at Mt. Bachelor: Role of NOx"; Jon's was titled "Overview of instrumentation and methods used at Mt. Bachelor"; and Dan's was titled "Scientific results from the 1st decade of observations at Mt. Bachelor."

 Group News : Jaffe Group publishes new papers on aerosol, ozone, and mercury
Posted on 2014/8/13 14:20:00

The Jaffe Group has published three new papers in 2014:

1. Timonen, H., Jaffe, D. A., Wigder, N., Hee, J., Gao, H., Pitzman, L., and Cary, R. A., 2014. Sources of carbonaceous aerosol in the free troposphere. Atmospheric Environment 92, 146-153, doi: 10.1016/j.atmosenv.2014.04.014.
Find the full article here.

2. Gratz, L. E., Jaffe, D. A., and Hee, J. R., 2014. Causes of increasing ozone and decreasing carbon monoxide in springtime at the Mt. Bachelor Observatory from 2004 to 2013. Atmospheric Environment, doi: 10.1016/j.atmosenv.2014.05.076.
Find the full article here.

3. Jaffe, D. A., et al., 2014. Progress on understanding atmospheric mercury hampered by uncertain measurements. Environmental Science & Technology 48, 7204-7206, doi: 10.1021/es5026432.
Find the full article here.

In the second paper, Gratz, Jaffe, and Hee examined 10-year trends in springtime ozone (O3) and CO at the Mt. Bachelor Observatory. They found that the median O3 increased significantly from 2004 to 2013, while the median CO decreased. They attributed the rise in springtime O3 to the increase in O3 precursor emissions in Asia and long-range transport to the western United States. These trends suggest that emissions from East Asia likely impact air quality in the western U.S.

Springtime ozone (O3) mixing ratios at MBO, 2004-2013
5th percentile (green circles), median (blue diamonds),
and 95th percentile (red triangles) springtime O3 mixing ratios.
The median and 95th percentile springtime O3 increased significantly over the 10-year period.

Find the full article here.

 Group News :  Nicole Wigder passes her PhD defense
Posted on 2014/8/4 11:00:00

Hearty congratulations to Nicole Wigder on passing her defense for her PhD! Nicole successfully defended her dissertation, "Influence of Baseline Air Masses and Wildland Fires on Air Quality in the Western United States."

Nicole, we wish you unlimited success in your new job, but we will struggle to fill the huge hole you left behind.

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