| Edge of the Greenland Ice Sheet |
| Midnight sun. |
| Map indicating where GISP2 site location. |
| GISP2 Drilling Site |
| Layout of the sub-surface core processing line (CPL) |
| Weatherport |
| Tent city |
| GISP Drill Dome |
| GISP2 drill from inside the drilling dome |
| Cutter head and core barrel being examined. |
| Core barrel being removed from drill |
| Extruding a core |
| Summer and winter core layers |
| GISP2 cores span 200,000 years of climate history |
| Core processing line |
| GISP2 science trench |
| Cross section of how ice core is sectioned |
| 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. |
| Signal of a 1479 A. D. eruption of Mt. St. Helens using data from Fiacco et al. (1993) |
| Fluctuations of ice conductivity |
| Calcium Concentrations |
| 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. |
| Thin wafers of ice for core viewed between crossed polarizers. |
| Non-Sea Sulfate and Nitrate Concentrations since 1900 |
| Snowcats carry cores to transport planes. |
| National Ice Core Laboratory (NICL) |
| Drs. Meier and Alley logging the core's annual layers and bubbliness at the NICL. |
| Antarctic ice |
| 3-D image of Vostok region |
| Vostok Site |
| Deep drilling at Vostok |
| Vostok Climate Records |
| Methane Records |
| Measurements of Greenhouse Gases |
| International team of scientists involved with Vostok |