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Texas A&M prof to predict weather on Mars
November 05, 2009Is there such a thing as "weather" on Mars? There are some doubts, considering the planet's atmosphere is only 1 percent as dense as that of the Earth. Mars, however, definitely has clouds, drastically low temperatures and out-of-this-world dust storms, and Istvan Szunyogh, a Texas A&M professor of atmospheric sciences, has been awarded a NASA grant to analyze and forecast Martian weather.
Mars is the most Earth-like planet we know, but it is still quite different. For example, it is much colder on Mars.
The south pole of the Earth is covered by water ice, but the south pole of Mars wears a dry ice (frozen carbon dioxide) cap. In winter, the temperature at the poles can dip to -140°C (-220 degrees Fahrenheit), which is so cold that even carbon dioxide freezes.
"Planet-encircling Martian dust storms, which occur every two to four Mars years, can cover the whole planet with dust for months," notes Szunyogh, who is working with colleagues from the University of Maryland and the Geophysical Fluid Dynamics Laboratory in Princeton, N.J., to forecast Martian weather.
Why care about weather on Mars? After all, nobody lives, works or goes to school there.
"Martian weather forecasts, in the short term, can drastically increase the safety of landing robotic exploration missions," comments colleague Mark Lemmon, a Texas A&M professor of atmospheric sciences who has led or participated in many Mars exploratory events. "In the long run, it is indispensible for the safe returning of astronauts in future manned explorations.
"The two rovers currently working on Mars are solar-powered, and their lives end when their batteries run out," Lemmon adds. "Dust storms block the sun and shorten their battery life, and winds, on the other hand, can clear their solar panels so their batteries recharge faster."
Weather forecasting is not tossing dice. It must build on solid data.
"All weather forecasts, including those on TV, are based on model forecasts of the different physical parameters of the Earth's atmosphere such as temperature, wind and pressure," Szunyogh says. "The main goal of our project is to explore the possibility of obtaining accurate quantitative estimates of these parameters of the Martian atmosphere.
"These parameters will be obtained from the available remotely sensed Martian observations," he adds. "Then the data can be fed into Mars global circulation models, producing Martian weather forecasts like what we have for Earth."
Texas A&M University
"Planet-encircling Martian dust storms, which occur every two to four Mars years, can cover the whole planet with dust for months," notes Szunyogh, who is working with colleagues from the University of Maryland and the Geophysical Fluid Dynamics Laboratory in Princeton, N.J., to forecast Martian weather.
Why care about weather on Mars? After all, nobody lives, works or goes to school there.
"Martian weather forecasts, in the short term, can drastically increase the safety of landing robotic exploration missions," comments colleague Mark Lemmon, a Texas A&M professor of atmospheric sciences who has led or participated in many Mars exploratory events. "In the long run, it is indispensible for the safe returning of astronauts in future manned explorations.
"The two rovers currently working on Mars are solar-powered, and their lives end when their batteries run out," Lemmon adds. "Dust storms block the sun and shorten their battery life, and winds, on the other hand, can clear their solar panels so their batteries recharge faster."
Weather forecasting is not tossing dice. It must build on solid data.
"All weather forecasts, including those on TV, are based on model forecasts of the different physical parameters of the Earth's atmosphere such as temperature, wind and pressure," Szunyogh says. "The main goal of our project is to explore the possibility of obtaining accurate quantitative estimates of these parameters of the Martian atmosphere.
"These parameters will be obtained from the available remotely sensed Martian observations," he adds. "Then the data can be fed into Mars global circulation models, producing Martian weather forecasts like what we have for Earth."
Texas A&M University
Many characteristics of Mars, including ice, are similar to Earth, paper says
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Phoenix mission to Mars will search for climate clues
On May 25, 2008, approaching 5 p.m. PDT, NASA scientists will be wondering: Just how green is their valley? That's because at that time the Phoenix Mars Mission space vehicle will be touching down on its three legs to make a soft landing onto the northern Mars terrain called Green Valley.
Aussies plan for Mars weather forecasts
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The Martian Climate Revisited: Atmosphere and Environment of a Desert Planet (Springer Praxis Books / Geophysical Sciences) by Peter L. Read (Author), Stephen R. Lewis (Author) The atmosphere and climate of Mars is a crucial factor, both for understanding the planet's past and appreciating the possibilities of its future. Given the high level of current interest in Mars, and the major advances afforded by recent space exploration, this book seeks to examine and review our knowledge and understanding of the meteorology and climate of Mars in its present state. This is based not only upon direct observations, but also on the newer techniques of modelling: numerical simulation and data assimilation. This authoritative discussion of Mars's atmosphere and climate, giving a balanced review of some of the hottest issues concerning Mars's environments, its present and past climate and potential to support life, and its possible future following manned exploration. |
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