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शुक्रवार, 19 जुलाई 2013

MOUNT EVEREST IN NEPAL



माउन्ट एवरेस्ट MOUNT EVEREST IN NEPAL

The 8,848 m (29,029 ft) height given is officially recognised by Nepal and China.

In 1856, Andrew Waugh announced Everest (then known as Peak XV) as 29,002 ft (8,840 m) high, after several years of calculations based on observations made by the Great Trigonometric Survey.

Mount Everest, as seen from Kalapattar

Sunset at Nuptse,a Himalayan giant in Nepal



The elevation of 8,848 m (29,029 ft) was first determined by an Indian survey in 1955, made closer to the mountain, also using theodolites.
It was subsequently reaffirmed by a 1975 Chinese measurement 8,848.13 m (29,029.30 ft). 
In May 1999 an American Everest Expedition, directed by Bradford Washburn, anchored a GPS unit into the highest bedrock. 
A rock head elevation of 8,850 m (29,035 ft), and a snow/ice elevation 1 m (3 ft) higher, were obtained via this device.




Northern panoramic view of Everest from Tibetan Plateau











Although it has not been officially recognized by Nepal,this figure is widely quoted. Geoid uncertainty casts doubt upon the accuracy claimed by both the 1999 and 2005 surveys.
A detailed photogrammetric map (at a scale of 1:50,000) of the Khumbu region, including the south side of Mount Everest, was made by Erwin Schneider as part of the 1955 International Himalayan Expedition, which also attempted Lhotse. 






An even more detailed topographic map of the Everest area was made in the late 1980s under the direction of Bradford Washburn, using extensive aerial photography.





On 9 October 2005, after several months of measurement and calculation, the Chinese Academy of Sciences and State Bureau of Surveying and Mapping officially announced the height of Everest as 8,844.43 m (29,017.16 ft) with accuracy of ±0.21 m (0.69 ft). 






This height is based on the actual highest point of rock and not on the snow and ice covering it. 


The Chinese team also measured a snow/ice depth of 3.5 m (11 ft),which is in agreement with 
a net elevation of 8,848 m (29,029 ft). 
The snow and ice thickness varies over time, making a definitive height of the snow cap impossible to determine.

It is thought that the plate tectonics of the area are adding to the height and moving the 
summit northeastwards. 
Two accounts suggest the rates of change are 4 mm (0.16 in) per year (upwards) and 3 to 6 
mm (0.12 to 0.24 in) per year (northeastwards),but another account mentions more lateral 
movement (27 mm or 1.1 in),and even shrinkage has been suggested.

Geologists have subdivided the rocks comprising Mount Everest into three units called "formations".

Each formation is separated from the other by low-angle faults, called "detachments", along which they have been thrust over each other. 

From the summit of Mount Everest to its base these rock units are the Qomolangma Formation, the North Col Formation, and the Rongbuk Formation.









2 टिप्‍पणियां:

Kusum Vir via yahoogroups.com ने कहा…

Kusum Vir via yahoogroups.com

Respected Acharya ji,
Very - very beautiful pictures of MOUNT EVEREST.
It was like feast of eyes, while seeing these pix.
Thank you so much.
Regards,
Kusum Vir

Unbelievable Nepal ने कहा…

Very Nice and Helpful information in the above Article...
For more information about Mount Everest Click Link:
Mount Everest