Satellites confirm it: ocean levels have risen in 30 years!


Matheus Manente Meteored Brazil 9 hours 5 minutes ago Satellite data collected over the last 30 years indicate that sea levels have risen 10 cm and that human effects already exceed natural cycles by a factor of 10. Thirty years ago it launched a new satellite scientists and engineers into space to study tides and sea level changes over time, something that previously could not be done only in the coastal region. For years, this satellite (known as TOPEX/Poseidon) has meticulously recorded ocean levels using its radar altimeter. RADAR ALTIMETERS emit pulses of radio waves that bounce off the surface ocean and return to the satellite. By calculating the return time of the radiation and the precise position of the satellite, the instrument detects the exact height of the sea surface below the satellite. TOPEX/Poseidon carried out its mission from 1996 to 2006. Meanwhile, several space agencies have also sent other similar missions into space: Jason-1 (2001 to 2013), Ocean Surface Topography Mission/Jason-2 (2008 in 2013). 2019); Jason-3 (2016 to present); Sentinel-6 Michael Freilich (2020 to present). 30-Year Tracking of Sea Level Rise Global mean sea level has risen 101 millimeters (3.98 inches). ) since 1992, and continues to do so at 3.9 mm (0.15 in) per year.— Carlos F. Camargo, Ph.D. (@CarlosFCamargo1) August 12, 2022 After 30 years of data collection, these missions have resulted in a unified and standardized record of ocean topography, equivalent to the work of half a million tide gaugers. And the observations have confirmed on a global scale what scientists had already observed locally: sea levels are rising, and faster. Will the sun reach its maximum temperature after 8 billion years, satellite data on sea level rise?. Using this data, the scientists were able to see that the global mean sea level has fluctuated up or down in different places, but that, on average, the result was a rise of 10.1 centimeters since 1992. The graph shows the evolution of global mean sea level over the last 30 years. . The highs and lows of each year are caused by the exchange of water between land and sea and can become La Niña and El Niño years, as you can see. (Image: NASA) That may not sound like much, but it equates to, on average, 10 meters of beach lost along coastlines around the world. If we add to this value the fact that high tides and storms can raise the level of the ocean even more, we realize that this change makes coastal flooding even more destructive. Climate change exacerbates more than 50% of Infectious diseases In addition, the data also shows that the phenomenon is accelerating. During the 20th century, it is estimated that the average level has increased by 1.5 mm per year. In the 1990s, this figure increased to 2.5 mm per year. And in the 2000s, the rate already reached 3.9 mm per year. Sea level rise due to human intervention on the climate now exceeds natural cycles. And it’s happening faster and faster – Josh Willis, NASA It’s also worth noting that the observed increase over the last 30 years is ten times the natural exchange of water between the ocean and land in a year, which which means that human-caused sea level rise is now ten times greater than natural cycles. The most accepted hypotheses today in the scientific community are that this rise is due to the accelerated melting of the Greenland ice sheet and Antarctica and could reach gigantic proportions by 2100.
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