Textbook sits to rewrite “the lowest point of earth land” in Antarctica

Researchers at the University of California, Irvine, recently said they found that deep in the canyon covered by the Denman Glacier in East Antarctica was the lowest point on Earth, 3,500 meters below sea level. A new study of Antarctica could change the geography textbook’s reference to the “lowest point of the Earth’s land.” Earlier, scientists determined that the Dead Sea coast, more than 400 meters below sea level, was the lowest point of exposure to land. But researchers at the University of California, Irvine, recently said they found that the depth of the Canyon covered by the Denman Glacier in East Antarctica was the lowest point on Earth, 3,500 meters below sea level.

Land is a part of the earth that is not submerged by the ocean. The record-breaking Antarctic Gorge is the lowest point of the naturally occurring Earth’s land, with no liquid water covering it. The Mariana Trench in the Western Pacific Ocean remains the deepest known depth of the Earth’s oceans, with a maximum known depth of 11,034 meters.

The elevation of the riverbed of the Antarctic ice sheet Letter h represents the site of the Denman Glacier , Nature Geoscience

The six-year study of Antarctic continental rock was led by Mathieu Moligham, an associate professor at the University of California, Irvine, CNN reported. They found that the canyon covered by the Denman Glacier was 100 km long and 20 km wide. Although the canyon’s lowest point is 3,500 meters below sea level, it is not seawater, but is filled with ice moving in the ocean.

The Denman Glacier is located in Queen Mary land in East Antarctica. According to the U.S. Geological Survey, the Australian Antarctic Expedition first discovered the glacier in November 1912 and named it after thomas Denman, then governor of Australia, a patron of the expedition.

The researchers presented the findings at the American Geophysical Society’s fall meeting. The study is published in the December 12, 2019 issue of the journal Nature Geoscience. The aim of the study is said to be to create an accurate map of the Antarctic continent, which is crucial to better understanding how ice flows from the central highlands to the waters around Antarctica.

Details of the Antarctic Glacier Riverbed, Maph represents the location of the Denman Glacier , Nature Geoscience

During the measurements, the researchers combined radar measurements, satellite-captured data on the glacier surface and the amount of snow that followed local climate patterns to calculate how much ice moved through the canyon, the speed and volume of the ice, to estimate the volume, shape and depth of the bottom of the canyon. Ligham said they applied the mapping technique to the entire ice sheet and found a very deep canyon hidden beneath it.

The discovery was drawn on a new map of Antarctica. The researchers say this is the “most accurate picture” of the Antarctic ice sheet’s subpography to date.

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