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Satellite Research Readings: The Global Sea Level Rises About 3mm Every Year…

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(Regional map of mean sea level trends from October 1992 to March 2010 as measured by radar altimeters. Some regions experience a rise of up to 10 mm per year (dark red), while others see a decrease of about 10 mm per year (dark blue). On average, the global sea level rises about 3 mm every year. This is a preliminary version of the data set that will be revealed at the ‘20 Years of Progress in Radar Altimetry Symposium’. / ESA /)

Sea Level Changes…

  • A unique 18-year run of satellite readings showing global sea level changes in unprecedented detail will be unveiled next week. Media representatives are invited toItaly’s lagoon city of Venice on 24 September to find out more. / Sea /

Regional Trends… / Sea

  • The data, obtained by radar altimeters on multiple satellites, show regional increases of sea level by up to10 mmeach year, such as in the Philippine Sea. Decreases of10 mmper year have been detected in some areas. On average, the global sea level rises about3 mmevery year.
  • With this new, high-resolution dataset, scientists can get a much clearer picture on regional trends and year-to-year variations. / Sea /
Sea

(The islands that make up the Italian city of Venice and the surrounding Venetian Lagoon are pictured in this image from the Ikonos-2 satellite. Constructed on wooden piles, Venice is prone to flooding tides that are becoming more frequent. In 2003 work began to block particularly high tides with submarine mobile barriers. The project is still underway. / ESA /)

The City Of Venice… / Sea

  • Media representatives will have the opportunity to discuss the data with scientists at the ‘20 Years of Progress in Radar Altimetry Symposium’ at the Venice Convention Centre Palazzo del Casinó on 24 September.
  • Held in a city where sea level is of particular significance, the symposium is organised by ESA in collaboration with the French space agency, CNES.
  • The week-long event will focus on the challenges overcome to develop our current understanding of Earth’s surface variations observed by radar altimeters – the spaceborne sensor that records the height of the global sea surface, freshwater bodies, land and ice.
  • Future developments to advance our understanding of oceans, coastal processes, the cryosphere and other themes like freshwater storage will also be discussed. / Sea /

(Source of Images: ESA / Sea /)

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