Science

ICESat-2: NASA Satellite to Monitor Earth's Vast Frozen Landscape

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NASA has successfully launched a new satellite to monitor and measure Earth’s frozen poles. The ICESat-2 satellite will orbit the planet from an altitude of 290 miles, gathering data to estimate the height changes of the Greenland and Antarctic ice sheets.

The instrument on board, the Advanced Topographic Laser Altimeter System (ATLAS), will be able to monitor shifts in the ice to within four millimeters—allowing scientists to get an unprecedented view of this remote and harsh environment.

“With this mission we continue humankind’s exploration of the remote polar regions of our planet and advance our understanding of how ongoing changes of Earth’s ice cover at the poles and elsewhere will affect lives around the world, now and in the future,” Thomas Zurbuchen, associate administrator of NASA’s Science Mission Directorate, said in a statement.

The satellite launched from California’s Vandenberg Air Force Base and after 75 minutes started transmitting signals back to NASA. It is currently traveling at a speed of 17,069 miles per hour, orbiting the globe from pole to pole.

ICESat-2 will be focusing on the cryosphere—the areas of the planet covered in ice. This is a key focus of NASA’s Earth science research, with researchers looking to find out how these regions are changing as global temperatures increase.

By understanding the changes to the polar ice caps, scientists will be able to better forecast future sea level rise based on melting rates. It will also help them understand how sea ice loss is affecting the ocean and atmosphere, as well as getting a grip on the mechanisms causing the ice to decrease.

As well as looking at the cryosphere, the satellite will also measure other parts of Earth, including the temperate and tropical regions.

The launch of ICESat-2. NASA/ Bill Ingalls

“For us scientists the most anticipated part of the mission starts when we switch on the laser and get our first data,” said Thorsten Markus, ICESat-2 project scientist at NASA’s Goddard Space Flight Center. “We are really looking forward to making those data available to the science community as quickly as possible so we can begin to explore what ICESat-2 can tell us about our complex home planet.”

Measurements from ICESat-2 will be available from the National Snow and Ice Data Center.

The ICESat-2 million is scheduled to last for three years. However, the future of NASA’s Earth monitoring activities are currently in doubt as a result of proposed budget cuts by the Trump administration. In May, Science magazine announced the space agency’s Carbon Monitoring System (CMS), a program to track the flow of carbon dioxide around the globe, had been axed.

According to space.com, five other Earth science missions were also targeted and the total budget for such research was reduced from $1.9bn in 2017 to $1.78bn in 2019.  

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