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Paleo Slide Set: Polar Ice Cores
Edge of the Greenland Ice Sheet Edge of the Greenland Ice Sheet
Midnight sun Midnight sun.
Map indicating where GISP2 site location Map indicating where GISP2 site location.
GISP2 Drilling Site GISP2 Drilling Site
Layout of the sub-surface core processing line Layout of the sub-surface core processing line (CPL)
Weatherport Weatherport
Tent city Tent city
GISP Drill Dome GISP Drill Dome
GISP2 drill from inside the drilling dome GISP2 drill from inside the drilling dome
Cutter head and core barrel being examined Cutter head and core barrel being examined.
Core barrel being removed from drill Core barrel being removed from drill
Extruding a core Extruding a core
Summer and winter core layers Summer and winter core layers
GISP2 cores span 200,000 years of climate history GISP2 cores span 200,000 years of climate history
Core processing line Core processing line
GISP2 science trench GISP2 science trench
Cross section of how ice core is sectioned Cross section of how ice core is sectioned
Electrical Conductivity Measurements (ECM) being conducted on the entire length of the core Electrical Conductivity Measurements (ECM) being conducted on the entire length of the core
ECM variations based on data from a 2.4 m section of ice from approximately 100 m below the surface ECM variations based on data from a 2.4 m section of ice from approximately 100 m below the surface.
Signal of a 1479 A. D. eruption of Mt. St. Helens using data from Fiacco et al. (1993 Signal of a 1479 A. D. eruption of Mt. St. Helens using data from Fiacco et al. (1993)
Fluctuations of ice conductivity Fluctuations of ice conductivity
Calcium Concentrations Calcium Concentrations
The ratio between the heavier H218O and lighter H216O water molecules in the ice The ratio between the heavier H218O and lighter H216O water molecules in the ice
Delta 18O and accumulation for 10,000-17,400 yr B.P Delta 18O and accumulation for 10,000-17,400 yr B.P.
Thin wafers of ice for core viewed between crossed polarizers Thin wafers of ice for core viewed between crossed polarizers.
Non-Sea Sulfate and Nitrate Concentrations since 1900 Non-Sea Sulfate and Nitrate Concentrations since 1900
Snowcats carry cores to transport planes Snowcats carry cores to transport planes.
National Ice Core Laboratory (NICL) National Ice Core Laboratory (NICL)
Drs. Meier and Alley logging the core's annual layers and bubbliness at the NICL Drs. Meier and Alley logging the core's annual layers and bubbliness at the NICL.
Antarctic ice Antarctic ice
3-D image of Vostok region 3-D image of Vostok region
Vostok Site Vostok Site
Deep drilling at Vostok Deep drilling at Vostok
Vostok Climate Records Vostok Climate Records
Methane Records Methane Records
Measurements of Greenhouse Gases Measurements of Greenhouse Gases
International team of scientists involved with Vostok International team of scientists involved with Vostok
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Last Modified: 17 May 2005
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