In addition, PhoREAL is a free library of geospatial analysis tools and source code written specifically for working with ATL03 and ATL08 data. To help document this, ICESat-2's height change measurements will have a precision of less than an inch – ground-truthed, in part, with efforts like this Antarctic campaign. ICESat-2 will help scientists investigate why, and how much, our cryosphere is changing in a warming climate. The 470-mile expedition in one of the most barren landscapes on Earth provides the best means of assessment of the accuracy of data collected from space by the Ice Cloud and land Elevation Satellite-2 (ICESat-2). In Photon Jump, a 3-minute short animation, a brave photon of light named Pho must travel from a NASA spacecraft down to Earth and back again to help complete a crucial science mission. Each time ATLAS collects data along a particular track, onboard software aims the laser beams so that the Reference Ground Track is always between the two beams, as shown in the animation. “ICESat-2’s new observational technologies will advance our knowledge of how the ice sheets of Greenland and Antarctica contribute to sea level rise while also helping us understand the connection of sea ice loss to the global system,” said Thomas Wagner, cryosphere program scientist in NASA’s Science Mission Directorate. With ICESat-2’s high-resolution data, scientists will track changes to Earth’s ice-covered poles, which is witnessing dramatic temperature increases. This year’s maximum extent, reached on March 7 at 5.57 million square miles (14.42 million square kilometers), is only about 40,000 square miles below the previous record low, which occurred in 2016, Surface height at specific length scale. craterlake_atl_2019175_lrg.jpg (2361x1574, JPEG); Metadata. The Ice, Cloud and land Elevation Satellite-2 will measure the height of Earth from space, creating a record of the planet’s elevation in unprecedented detail and precision. The Antarctic ice sheet, shown here, ranges up to 4000m above sea level. Evaluation by the ICESat-2 research team indicates the potential for bathymetric measurement to depths of 30m in sub-tropical waters. As a global mission, ICESat-2 will collect data over the entire globe, however the ATLAS instrument is optimized to measure land ice and sea ice elevation in the polar regions. <>/Metadata 1156 0 R/ViewerPreferences 1157 0 R>>
New state-of-the-art snow accumulation models have been developed to provide this extra data in preparation for the launch of ICESat-2. The Arctic’s sea ice maximum extent has dropped by an average of 2.8 percent per decade since 1979, the year satellites started measuring sea ice. ICESat-2 will extend and improve upon NASA's 15-year record of monitoring the change in polar ice heights, which started in 2003 with the first ICESat mission and continued in 2009 with NASA’s Operation IceBridge, an airborne research campaign that monitors the accelerating rate of change.
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