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Siple Dome (81°39′15″S 149°00′18″W) is an ice dome approximately 100 km wide and 100 km long, located 130 km east of Siple Coast in Antarctica. Charles Bentley and Robert Thomas established a "strain rosette" on this feature to determine ice movement in 1973–74. They referred to the feature as Siple Dome because of its proximity to Siple Coast.

Siple Dome Field Camp
Camp
Siple Dome Field Camp in 2012
Siple Dome Field Camp
Coordinates: 81°39′15″S 149°00′18″W
Country United States
Location in AntarcticaSiple Dome
Marie Byrd Land
Antarctica
Administered byNational Science Foundation
Established1996 (1996)
Elevation
730 m (2,400 ft)
Population
 • TotalUp to 60
TypeSeasonal

Siple Dome ice core


The Siple Dome ice core project (79.468° S 112.086° W) was conducted by the United States National Science Foundation. The deepest ice was recovered in 1999 from 974 m, with an age of 97,600 years.[1]

It is best known for the poorly-explained steps in water isotopes during the deglacial, which are unique to this core and may indicate a rapid decrease in the surface elevation of the adjoining ice streams during the deglacial[2] and a record of atmospheric carbon dioxide.[3] The Chief Scientist was Kendrick Taylor.


Radar surveys of internal ice structure


In the 1990s a team from the University of Washington and St Olaf College surveyed the ice, measuring thickness and determining internal structure, [4] finding evidence for the operation of the Raymond Effect. They also found that the ice had a maximum thickness of around 1000 m.




Climate


The climate is ice cap (Köppen: ET), as is most of the continent. Without marine moderation and a few hundred meters above sea level, it has one of the harshest winters on the continent outside the Antarctic plateaus. Unlike Alert, NU at slightly higher latitude and positive high averages during summer, in Siple Dome temperatures remain below freezing during the afternoon of the warmer months on average.[5][6]

Climate data for Siple dome, elevation: 620 m or 2,030 ft, 1997-2011 normals and extremes
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 11.4
(52.5)		 7.1
(44.8)		 −4.6
(23.7)		 −4.6
(23.7)		 −4.9
(23.2)		 −5.9
(21.4)		 −8.6
(16.5)		 −8.8
(16.2)		 −5.6
(21.9)		 0.0
(32.0)		 3.1
(37.6)		 7.4
(45.3)		 11.4
(52.5)
Average high °C (°F) −5.5
(22.1)		 −11.3
(11.7)		 −18.0
(−0.4)		 −22.5
(−8.5)		 −24.7
(−12.5)		 −23.5
(−10.3)		 −26.1
(−15.0)		 −28.9
(−20.0)		 −25.0
(−13.0)		 −18.1
(−0.6)		 −10.2
(13.6)		 −5.3
(22.5)		 −18.3
(−0.9)
Daily mean °C (°F) −9.8
(14.4)		 −15.7
(3.7)		 −22.5
(−8.5)		 −26.6
(−15.9)		 −29.0
(−20.2)		 −27.6
(−17.7)		 −30.3
(−22.5)		 −32.9
(−27.2)		 −29.8
(−21.6)		 −23.6
(−10.5)		 −15.1
(4.8)		 −9.8
(14.4)		 −22.7
(−8.9)
Average low °C (°F) −13.3
(8.1)		 −19.3
(−2.7)		 −26.4
(−15.5)		 −30.6
(−23.1)		 −33.3
(−27.9)		 −31.7
(−25.1)		 −34.4
(−29.9)		 −37.1
(−34.8)		 −33.9
(−29.0)		 −27.9
(−18.2)		 −18.7
(−1.7)		 −13.3
(8.1)		 −26.7
(−16.0)
Record low °C (°F) −22.9
(−9.2)		 −33.9
(−29.0)		 −41.8
(−43.2)		 −49.9
(−57.8)		 −49.6
(−57.3)		 −56.6
(−69.9)		 −54.6
(−66.3)		 −59.4
(−74.9)		 −53.9
(−65.0)		 −44.8
(−48.6)		 −37.9
(−36.2)		 −21.9
(−7.4)		 −59.4
(−74.9)
Source: Climatebase.ru[6]

See also


Siple Dome Skiway
Siple Dome Field Camp
  • IATA: none
  • ICAO: none
Summary
Airport typegovernment
Owner/OperatorUS Antarctic Program
LocationMarie Byrd Land
Elevation AMSL1,994 ft / 607 m
Coordinates81°39′29″S 148°59′51″W
Map
Siple Dome Skiway
Location of airfield in Antarctica
Runways
Direction Length Surface
ft m
10,940 3,330 Ice

Further reading



References


  1. Brook, E. J., White, J. W., Schilla, A. S., Bender, M. L., Barnett, B., Severinghaus, J. P., ... & Steig, E. J. (2005). Timing of millennial-scale climate change at Siple Dome, West Antarctica, during the last glacial period. Quaternary Science Reviews, 24(12), 1333-1343.
  2. Taylor, K. C., White, J. W. C., Severinghaus, J. P., Brook, E. J., Mayewski, P. A., Alley, R. B., ... & Lamorey, G. W. (2004). Abrupt climate change around 22ka on the Siple Coast of Antarctica. Quaternary Science Reviews, 23(1), 7-15.
  3. Ahn, J., Wahlen, M., Deck, B. L., Brook, E. J., Mayewski, P. A., Taylor, K. C., & White, J. W. (2004). A record of atmospheric CO2 during the last 40,000 years from the Siple Dome, Antarctica ice core. Journal of Geophysical Research: Atmospheres, 109(D13)
  4. Nereson, N.A.; Raymond, C.F.; et al. (2000). "The accumulation pattern across Siple Dome, West Antarctica, inferred from radar-detected internal layers". Journal of Glaciology. 46 (152): 75–87. Bibcode:2000JGlac..46...75N. CiteSeerX 10.1.1.367.2532. doi:10.3189/172756500781833449. S2CID 18864009.
  5. "World Maps of Köppen-Geiger climate classification". koeppen-geiger.vu-wien.ac.at. Retrieved 2019-07-24.
  6. "Siple dome, Antarctica #89345". Climatebase.ru. Retrieved July 24, 2019.

 This article incorporates public domain material from the United States Geological Survey document: "Siple Dome". (content from the Geographic Names Information System)

SDFC's outhouse.
SDFC's outhouse.


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