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Riding the storm for better climate models
with David Hudak |
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Dr. David Hudak
(Photo: David Hudak) |
When a cold northwest wind blows a winter storm into Ontario, Dr. David Hudak takes to the skies in a research aircraft, collecting data about the clouds that are creating havoc below. |
Looking at clouds from all sides
The stormy flights are part of Hudak's job as a research scientist with Environment Canada studying clouds and other weather-related phenomena. But soon these flights will have another aim: to check the accuracy of data collected over Canada by NASA's CloudSat, the new Earth-orbiting satellite, as it begins its comprehensive study of clouds.
It is set to launch in 2006. |
CloudSat will help us better understand how clouds affect climate (Image: NASA) |
Dr. David Hudak, an expert in radar meteorology and cloud physics, is Canada's co-principal investigator for CloudSat. (Photo: David Hudak) |
"This will be the first satellite to profile clouds in three
dimensions. CloudSat will also have a near-polar orbit, so for the first time we'll be able to study the all the clouds over
Canada," says Hudak, who is the project's Canadian co-principal investigator.
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In the thick of it
Hudak will help validate the satellite data on Canada—a project funded by the Canadian Space Agency. He will compare data from CloudSat with information collected by Environment Canada's existing radar and forecasting network, a state-of-the art field site, and the National Research Council's cloud physics research aircraft. "When CloudSat is over southwestern Ontario, we'll be flying under it
every chance we get." |
Clouds cover affects the amount
of solar energy retained by the atmosphere. A small change in
cloud cover can significantly
modify the climate. |
Improving climate models
To help us better understand how clouds affect climate, and use that knowledge to improve projections of climate change, CloudSat will gather new information on the structure and volume of clouds, as well as the amount of water and ice they contain, thanks to the Canadian contribution of millimetre-wavelength radar.
"This information will increase our understanding of how precipitation is formed," says Hudak. "And it will improve the numerical climate models so projections will be more accurate."
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Around the world with weather studies
It was the chance to see nature's beauty and fury up close that first drew him to this field. Trained as a weather forecaster, Hudak then earned a doctorate in physics from the University of Toronto in radar meteorology and cloud physics. Today he works for the Science and Technology Branch of Environment Canada. During his 30-year career in atmospheric science, he has been involved in research projects around the world. |
Boeing technicians assemble CloudSat (Photo: David Hudak) |
King Weather Radar Research Station is operated by Environment Canada (Photo: Environment Canada) |
"I've taken part in studies of winter storms in Newfoundland, the monsoons in southeast Asia, blizzards and storms in the High Arctic, and weather modification projects in Africa," says Hudak. "I spent six years trying to make rain in Africa by seeding the clouds and it has been a terrific learning experience. One way to know if you understand weather is to see if you can change it." |
More on CloudSat
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