Mount erebus fact page9/25/2023 ![]() ![]() ![]() The elliptical shape of the layer, the fact that it thins towards the edges, and the fact that all of the debris was deposited at the same time led the researchers to conclude that this must be a fine sheet of volcanic debris that was propelled into the air by an eruption and settled back down on the ice around the volcano. They deduced that instead of marking the bottom of the ice sheet, the signal comes from a layer of debris, 0.3 millimetres at its thinnest, suspended in the ice. Standing at 3,794 metres, Mount Erebus is the second highest volcano in Antarctica after Mount Sidley and was discovered by the Polar explorer James Ross in. But it is so strong that previous researchers had thought that it must be bedrock and mapped it as the bottom of the ice sheet on that assumption.Ĭorr and Vaughan's radar allowed them to see through the signal to the real bedrock beneath. Volcanic gas emissions from Mount Erebus and their impact on the Antarctic environment, Journal of Geophysical Research B. The radar signal had been noticed before. Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.Hugh Corr and David Vaughan of the British Antarctic Survey made their discovery using a powerful radar system.įlying over the Hudson Mountains, which separate the East and West Antarctic ice sheets, they detected a layer of debris the size of New Hampshire in the US (23,000 square kilometres), between 100 and 700 meters beneath the surface of the ice. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.Īdditional information about general usage can be found in Conditions.Īlso Available: Download the high-resolution JPG version of the image. ![]() The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. Images credited to the National Science Foundation, a federal agency, are in the public domain. All media in the gallery are intended for personal, educational and nonprofit/non-commercial use only. Images and other media in the National Science Foundation Multimedia Gallery are available for use in print and electronic material by NSF employees, members of the media, university staff, teachers and the general public. See other images like this on your iPhone or iPad download NSF Science Zone on the Apple App Store. ![]() For more information about USAP, visit the program's website. Outreach such as the Antarctic Artists and Writers program and education programs are also supported. research stations on the continent, USAP supports research projects in an array of scientific disciplines including aeronomy and astrophysics, biology and medicine, geology and geophysics, glaciology, and ocean and climate systems. The National Science Foundation runs the U.S. Geothermal processes such as the venting of gas and heat from the volcano's magma chamber form fumaroles and ice caves around its flanks. and the fact that acquisition is typically much more seldom than the repeat period because. DecemIce cave on Mount ErebusĪn ice cave on Mount Erebus, a volcano on Ross Island, Antarctica, takes on an ethereal blue glow from light shining through the ice. The most active volcano in Antarctica is Mount Erebus (Fig. ![]()
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