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June 2008

NCAR names three new senior scientists

Yuhong Fan

Yuhong Fan.

Alan Fried

Alan Fried.

Steve Tomezyk

Steve Tomczyk.

The UCAR Board of Trustees appointed three new senior scientists in May. Senior scientists provide NCAR with long-term scientific leadership. The position is analogous to that of full professor at a tenure-granting university. Selections are based on individual competence in research and activities that enhance NCAR’s interaction with scientists in the broader community.

Following are brief profiles of the new senior scientists.

Yuhong Fan (ESSL/HAO)

Yuhong Fan is a solar physicist focused on helioseismology and the magnetohydrodynamics of the solar interior and corona. Using theoretical and numerical modeling, she studies the emergence of flux tubes in solar active regions and the evolution of the large-scale magnetic fields in the solar corona that result in coronal mass ejections.

Yuhong’s research on the rise of active-region flux tubes in the solar interior has led to important insights into the origin of a well-known asymmetric property of solar active regions. Her numerical modeling of the evolution of the coronal magnetic field in response to the emergence of twisted active-region flux tubes has also contributed significantly to understanding the sigmoid-shaped X-ray brightening observed in regions where coronal mass ejections originate.

Yuhong holds a bachelor’s degree in space physics from China’s Peking University and a doctorate in astronomy from the University of Hawaii. Before coming to NCAR in 1998, she did postdoctoral research at the National Solar Observatory in Tucson and was a research associate at CU’s Joint Institute of Laboratory Astrophysics. She currently heads HAO’s Corona and Heliosphere section.

Alan Fried (EOL)

A chemist by training, Alan manages EOL’s Technology Development Facility, where he identifies and explores new opportunities for developing state-of-the-art instruments for atmospheric research. As part of this effort, he maintains a research program dedicated to developing new spectroscopic instruments for airborne platforms and associated measurements of trace gases, with the goal of improving our understanding of atmospheric processes and transformations related to hydrocarbon oxidation.

Alan and his group, in collaboration with atmospheric modelers, have been studying formaldehyde, an important trace gas and radical source, throughout the troposphere and lower stratosphere (see cover story). The studies are uncovering new processes and unexplained results as well as providing key model constraints in hydrocarbon oxidation studies. Most recently, Alan and colleagues have documented the importance of convective transport of formaldehyde and its precursors during summer months in forming radicals and ozone in the upper troposphere and lower stratosphere.

Alan has a doctorate in physical chemistry from Ohio State University. He first came to NCAR in 1977 as a postdoctoral researcher, returning in 1986 as part of ESSL/ACD. He headed the Analytical Photonics and Optoelectronics Laboratory (APOL) group, a joint effort between EOL and ACD, before moving into his current position.

Scientists III

Eight NCAR researchers have been promoted to the scientist III level, which is one step below senior ­scientist.

Aiguo Dai (ESSL/CGD)
Gokhan Danabasoglu (ESSL/CGD)
Mausumi Dikpati (ESSL/HAO)
Joan Kleypas (RAL/ISSE)
Dan Marsh (ESSL/ACD)
Brian O’Neill (RAL/ISSE)
Laura Pan (ESSL/ACD)
Junhong Wang (EOL)

Steven Tomczyk (ESSL/HAO)

Steve is an astronomer whose main interests are observing solar oscillations and developing instrumentation and techniques for studying magnetic fields in the Sun’s photosphere and corona.

He leads the development of CoMP, a coronal multichannel polarimeter that has captured landmark imagery of magnetic structures in the solar atmosphere. The instrument is expected to provide the next generation of data on magnetic structures in the solar corona.

Using CoMP last year, Steve and colleagues became the first scientists to observe elusive oscillations in the solar corona known as Alfvén waves. The discovery will give researchers more insight into the fundamental behavior of solar magnetic fields, eventually leading to a fuller understanding of how the Sun affects Earth and the solar system.

Steve has a doctorate from the University of California, Los Angeles. He came to NCAR in 1988 as a visiting scientist.

In this issue...

Measuring the Arctic's haze and smoke

NCAR names three new senior scientists

UCAR readies new financial management tools

Bluefire burns hot - with less energy

Researchers study monsoon in Taiwan

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