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By NASA
Explore This Section Earth Earth Observer Editor’s Corner Feature Articles Meeting Summaries News Science in the News Calendars In Memoriam More Archives Conference Schedules Style Guide 1 min read
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The Global Learning and Observations to Benefit the Environment (GLOBE) Program is calling on volunteers of all ages to help students and citizen scientists document seasonal change through leaf color and land cover. The data collection event will support students across North America, Latin America, Central America, and Europe, who are working together to document the seasonal changes taking place from September through December – see Figure. The observations will also provide vital data for GLOBE students creating student research projects for the GLOBE 2025 International Virtual Science Symposium (IVSS). The project is part of GLOBE’s Intensive Observation Period (IOP), which collects data during a focused period to assess how climate change is unfolding in different regions of the world.
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Last Updated Apr 11, 2025 Related Terms
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By European Space Agency
On 15 October 2024, ESA’s Euclid space mission reveals the first piece of its great map of the Universe, showing millions of stars and galaxies.
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By NASA
Timothy Lang (ST11) is a coauthor on an article titled, “Employing Optical Lightning Data to identify lightning flashes associated to Terrestrial Gamma-ray Flashes,” which was recently accepted for publication in the Bulletin of Atmospheric Science and Technology. Rich Blakeslee, formerly of the NASA MSFC Emeritus program, is also a coauthor on the study. The study – which was led by Christoph Köhn of the Technical University of Denmark (DTU) – used data from the International Space Station Lightning Imaging Sensor (ISS LIS) and the Atmosphere-Space Interactions Monitor (ASIM; also on the ISS) to improve our understanding of what types of lightning flashes are associated with terrestrial gamma-ray flashes (TGFs), which emit high-energy radiation from thunderstorms. The team developed an algorithm that accurately reduced the total population of LIS-observed lightning to a much smaller population of candidate TGF-related flashes by looking for unique characteristics within the flashes. ASIM, which can observe TGFs, was used to validate the algorithm. This study is important because instruments like ASIM only observe 300-400 TGFs per year, while LIS observed on average ~1 million lightning flashes per year. This difference of four orders of magnitude in frequency of occurrence means that data-reduction algorithms are necessary to facilitate studying the relationships between TGFs and lightning. In addition, a recent NASA field campaign demonstrated that TGF occurrence may be significantly higher than what can be measured from space, particularly within tropical thunderstorms. Thus, an algorithm that identifies possible characteristics TGF-related lightning may help us later in understanding differences between lightning associated with strong TGFs (observable from space) and lightning associated with weaker TGFs (not currently observable from space).
Read the paper at: https://link.springer.com/article/10.1007/s42865-024-00065-y.
Graphic showing the integration of the Lightning Imaging Sensor with the International Space Station.View the full article
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By NASA
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