Oxygen-Isotope and Total Beta-Radioactivity Measurements on 10 m Ice Cores from the Antarctic Peninsula

Ice shelf changes on the Antarctic Peninsula

Interpreting temperature information from ice cores along the Antarctic Peninsula: ERA40 analysis

[1] Analysis of ERA40 temperature and accumulation data suggests that annual mean isotopic fluctuations due to temperature change will be geographically very variable across the Peninsula: isotopic variations of 0.4% at James Ross Island; 0.9% at Dyer; and 1.3% at Gomez are all likely to indicate an identical magnitude of temperature change. The reduction in the magnitude of the isotopic signal...

Highly resolved δ 13 C measurements on CO 2 in air from Antarctic ice cores

A new method for δC analysis of very small air amounts of less than 0.5 cm STP was developed. This corresponds to less than 10 g of ice. It is based on the needle-crasher technique, which is routinely used for CO2 concentration measurements by infrared laser absorption. The extracted air is slowly expanded into a large volume through a water trap held at −70 C where the pressure is measured. Th...

Antarctic temperatures over the past two centuries from ice cores

[1] We present a reconstruction of Antarctic mean surface temperatures over the past two centuries based on water stable isotope records from high-resolution, precisely dated ice cores. Both instrumental and reconstructed temperatures indicate large interannual to decadal scale variability, with the dominant pattern being anti-phase anomalies between the main Antarctic continent and the Antarct...

Ice-shelf – ocean interactions at Fimbul Ice Shelf, Antarctica from oxygen isotope ratio measurements

Melt water from the floating ice shelves at the margins of the southeastern Weddell Sea makes a significant contribution to the fresh water budget of the region. In February 2005 a multi-institution team conducted an oceanographic campaign at Fimbul Ice Shelf on the Greenwich Meridian as part of the Autosub Under Ice programme. This included a mission of the autonomous submarine Autosub 25 km i...