| Siple Dome Field Camp | |
| Settlement Type: | Camp |
| Mapsize: | 270px |
| Pushpin Map: | Antarctica |
| Pushpin Mapsize: | 270 |
| Pushpin Relief: | yes |
| Coordinates: | -81.6543°N -149.0051°W |
| Subdivision Type: | Country |
| Subdivision Name: |  |
| Subdivision Type1: | Location in Antarctica |
| Subdivision Name1: | Siple Dome Marie Byrd Land Antarctica |
| Subdivision Type3: | Administered by |
| Subdivision Name3: | National Science Foundation |
| Established Title: | Established |
| Blank Name Sec1: | Type |
| Blank Info Sec1: | Seasonal |
| Blank Name Sec2: | Status |
| Elevation M: | 730 |
| Population Total: | Up to 60 |
Siple Dome (-81.6543°N -149.0051°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.
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.
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.
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]
| Siple Dome Skiway | |
| Type: | government |
| Owner-Oper: | US Antarctic Program |
| Location: | Marie Byrd Land |
| Elevation-F: | 1,994 |
| Elevation-M: | 607 |
| Coordinates: | -81.6581°N -148.9974°W |
| Pushpin Map: | Antarctica |
| Pushpin Mapsize: | 270 |
| Pushpin Map Caption: | Location of airfield in Antarctica |
| R1-Length-F: | 10,940 |
| R1-Length-M: | 3,330 |
| R1-Surface: | Ice |