Site Details

Borehole Locations

Hole	Year Drilled	Drill Used	Diameter (cm)	TopDepth (m)	BottomDepth (m)	Latitude, Longitude	Altitude (ft)	Remarks
WDC06A	2007/08	DISC	12.2	114	580	79^o28.058'S, 112^o05.189'W	~5927	Deep core
WDC06A	2006	4" drill	10	0	114	79^o28.058'S, 112^o05.189'W	~5927	Deep core
WDC06B	2006	4" drill	10	0	130	79^o28.048'S, 112^o05.160'W	~5927	Allocation to be determined
WDC05A	2005	4" drill	10	0	~299	79^o27.777'S, 112^o07.506'W	~5927	Collected for gas analysis
WDC05B	2005	3" Eclipse drill	7.5	0	~75	79^o27.775'S, 112^o07.422'W	~5927	Hole drilled for firn gas sampling; core will be used for chemistry method development
WDC05C	2005	3" Eclipse drill	7.5	0	~80	79^o27.777'S, 112^o07.362'W	~5927	Hole drilled for firn gas sampling; core will be used for chemistry method development
WDC05Q	2005	4" drill	10	0	~130	79^o28.052'S, 112^o05.137'W	~5927	Drilled at the arch pit; used for chemistry and isotopes
WDC05E	2005	4" drill	10	0	~32	79^o27.777'S, 112^o07.506'W	~5927	Collected for firn structure studies

Site Characteristics

Longitude:	112.085^oW
Latitude:	79.467^oS
Surface elevation:	1,759 m
Distance from current flow divide:	24 km
Current ice-accumulation rate:	22 cm/yr
Current average annual surface temperature:	-31^oC
Age at 90% of total depth¹:	98-105 ka
Age at 96% of total depth¹:	175-236 ka
Age by which annual layers have thinned to a thickness of 1 cm²:	45-46 ka
Age of the ice in the depth range when the ice is brittle³:	1.8-9.4 ka
Ice thickness:	3,465 m
Ice age-gas age difference in Holocene:	200 years
Ice age-gas age difference in the glacial period:	300-500 years

Notes:
¹ Calculated with the expected high and low geothermal heat flux.
² Calculated with the expected high and low geothermal heat flux. This is approximately how far back the core can be dated by counting annual layers.
³ Core quality will be lower in this age range.