Stony Brook Matters
Pavlos Kollias

Atmospheric scientist Pavlos Kollias, who holds a joint appointment at Stony Brook University and the U.S. Department of Energy’s Brookhaven National Laboratory (BNL), is the recipient of a 2020 American Geophysical Union (AGU) Atmospheric Sciences Ascent Award.

Pavlos Kollias
Pavlos Kollias

This award annually recognizes five exceptional, mid-career scientists for their excellence in research and leadership in the atmospheric and climate sciences.

“I had no idea my work had left such an impression on my community,” Kollias said. “I am grateful for my mentors, colleagues and family, whose support has been instrumental throughout my career.”

Kollias noted that he strives to give back by mentoring young scientists in atmospheric remote sensing, which has fascinated him for years.

The community of scientists using short-wavelength radars to study clouds was extremely small when Kollias was a graduate student. “You could count on one hand the number of people that had these kinds of systems at universities in the U.S.,” he said.

But in the 20 years since the atmospheric scientist received his PhD in meteorology from the University of Miami, he has helped grow the field, in part by teaching a new generation of scientists domestically and abroad — through universities and workshops — to carry on the work of using radars to better understand clouds and rain formation and their role in Earth’s climate.

Kollias, who is a professor of atmospheric sciences in Stony Brook’s School of Marine and Atmospheric Sciences and director of Brookhaven Lab’s Center for Multiscale Applied Sensing, also actively seeks to connect with the private sector and technologists who are working to improve atmospheric measurements through the development of next-generation remote sensing systems. For example, the radar enthusiast has built a strong partnership with Raytheon, allowing him to explore applications of phased-array radars for weather tracking.

Growing up in sunny Athens, Greece, Kollias rarely saw severe weather making the news. Yet he became interested in cloud microphysics, remote sensing and climate as he worked toward earning a bachelor’s degree in physics and a master’s degree in atmospheric science at the University of Athens. He was motivated to come to the United States to acquire more hands-on radar meteorology and cloud and precipitation research experience.

It was at the University of Miami’s Rosenstiel School of Marine and Atmospheric Science that Kollias got swept up by what he calls the “perfect storm” that influenced his own career and research. He found mentors in cloud scientist Bruce Albrecht, who served as his dissertation advisor and further fostered his interest in cloud-scale processes, and in Roger Lhermitte, now deceased, whom he remembers as the “godfather of radar meteorology.”

“With this nurturing, there was no question when I graduated in 2000 that I was ready to understand radar technology and help the field grow,” Kollias said. He was also equally ready to tackle the physical processes at play in cloud and precipitation systems.

Kollias’ interests led him to connect with the DOE’s Atmospheric Radiation Measurement (ARM) user facility, which has pioneered the use of small-wavelength cloud radars since the 1990s. He served as ARM’s associate chief scientist from 2007 to 2009, after which he became a Canada Research Chair at McGill University. In 2016 Kollias moved back to the U.S. to join Brookhaven Lab and SBU. He said he got “fired up” by Associate Lab Director for Environment, Biology, Nuclear Science & Nonproliferation Martin Schoonen’s strategic vision for the Lab’s environmental and climate sciences department.

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