All posts tagged: satellite data

‘There’s Nowhere Else To Go’: Astronaut Shubhanshu Shukla Calls For Attention To Climate Crisis | India News

‘There’s Nowhere Else To Go’: Astronaut Shubhanshu Shukla Calls For Attention To Climate Crisis | India News

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Last Updated:November 23, 2025, 10:34 IST Astronaut and Air Force Group Captain Shubhashu Shukla, who went to space in June, recalled his travel outside the Earth as a profound realisation that this planet is the only home Astronaut Shubhanshu Shukla during the ‘International Conference of Chief Justices of the World’ organised by the private City Montessori School, in Lucknow on November 21, 2025. (Image: PTI/Nand Kumar) Even as the UN Climate Conference came to a close, fraught with geopolitical tensions and the looming absence of the US, astronaut Shubhanshu Shukla called attention to the global climate crisis and urged the youth to work together to tackle such challenges. Group Captain Shubhashu Shukla, who went to space in June, recalled his travel outside the Earth as a profound realisation that this planet is the only home. Speaking at the 26th International Conference of Chief Justices of the World at his alma mater City Montessori School in Lucknow, he said “this is your planet, this is your home, there is nowhere else to go”. Shukla said the …

New Study Reveals Recent Ice Gains in Antarctica, But Long-Term Melting Continues

New Study Reveals Recent Ice Gains in Antarctica, But Long-Term Melting Continues

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Global warming and climate change have been subjects of major concern for a long time. One of the key indicators of this phenomenon is the melting of ice in the polar regions. Researchers from Tongji University in Shanghai have been using NASA satellite data to track changes in Antarctica’s ice sheet over more than two decades. Their newest study states that despite the increase in global temperature, Antarctica has gained ice in recent years. However, it cannot be considered as a miraculous reversal in global warming because over these two decades, the overall trend is substantial ice loss. Most of the gains have been caused by unusual increased precipitation over Antarctica. About the New study According to the new study, NASA’s Gravity Recovery And Climate Experiment (GRACE) and GRACE Follow-On satellites have been monitoring this ice sheet since 2002. The ice sheet covering Antarctica is the largest mass of ice on Earth The satellite data revealed that the sheet experienced a sustained period of ice loss between 2002 and 2020. The ice loss accelerated in …

28 Major US Cities Are Sinking, Including NYC and Chicago, Satellite Study Finds

28 Major US Cities Are Sinking, Including NYC and Chicago, Satellite Study Finds

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A new satellite-based study reveals that the 28 most populous cities in the United States—including New York City, Chicago, Dallas, and Denver—are gradually sinking at rates of 2 to 10 millimetres (0.08 to 0.4 inches) per year. Researchers at Virginia Tech used high-resolution radar measurements to map this ground subsidence across urban regions. In every city examined, at least 20 percent of the land area was found to be sinking; in 25 of the 28 cities, more than 65 percent exhibited measurable downward movement, posing serious long-term risks to urban infrastructure systems. As per the Nature Cities report published on May 8, cities in Texas showed the highest subsidence rates, with Houston being the most affected—40 percent of the city is sinking faster than 5 millimetres per year, and 12 percent exceeds 10 millimetres annually. Under the direction of Leonard Ohenhen, the researchers linked almost 80 percent of the urban subsidence to too high groundwater extraction, a process motivated by growing urban needs. While natural geological activity is important as well, human activity is now the dominant driver …

SWOT Satellite Observes Seismic Tsunami Event in Greenland’s Dickson Fjord

SWOT Satellite Observes Seismic Tsunami Event in Greenland’s Dickson Fjord

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An unprecedented nine-day tsunami following a significant rockslide in Greenland’s Dickson Fjord was recently recorded by the international Surface Water and Ocean Topography (SWOT) satellite, a collaborative mission by NASA and France’s Centre National d’Études Spatiales (CNES). The event, which took place in September 2023, saw a unique pattern of seismic waves resonate around the world, marking one of the rare instances where satellite data captured a prolonged natural phenomenon with such clarity. Satellite’s Breakthrough Detection in Remote Fjord As per a report by NASA, the rockslide unleashed over 25 million cubic meters of rock and ice into the fjord, displacing the water and creating a massive wave that moved rhythmically between the fjord walls every 90 seconds for nine consecutive days. NASA’s Jet Propulsion Laboratory scientist Josh Willis highlighted this as a first, saying, “SWOT’s technology allowed us to see the wave contours, something we couldn’t achieve before.” The water levels on the northern side of Dickson Fjord rose as high as 1.2 metres in contrast to the southern side, emphasising the powerful impact …