![]() Online edition of India's National Newspaper Friday, May 18, 2007 ePaper |
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News Analysis
In the report, the height of Mt. Everest was given as 8,850 metres, which a reader disputed and said was 8848 m. Praveen Swami clarifies that there are several conflicting figures of Everest's altitude, which have come about because of a variety of technical factors, including the fact that snow and ice thickness vary with the season, making a definitive measurement impossible. In the report, he used a 1999 estimate, which is now standard in most of the recent mountaineering literature. In May 1999, an American Everest Expedition, directed by Bradford Washburn, anchored a Global Positioning System unit into the highest bedrock on the mountain. A rock-head elevation of 8,850 metres (29,035 feet), and an ice elevation of an additional 1 metre, was obtained. Although the figure has not been officially approved by Nepal, it is now widely cited because of the technology used. In October 2005, China's State Bureau of Surveying and Mapping announced that the height of the rock on Everest, not allowing for snow and ice, is 8,844.43 metres +/- 0.21 metres. (29,017.16 +/- 0.69 ft). Interestingly, the altitude of Everest is constantly changing. Tectonic movements the forces which caused the great Kashmir earthquake of 2005 are adding to the height of the summit and also moving it north-east. Two separate accounts suggest the summit moves upwards 4 millimetres each year, and 3-6 millimetres north-east. As with studies of altitude, though, other accounts dispute these figures.
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