The summit of Law Dome is approximately 1400 m above sea level, and several cores have been drilled.The longest core extends all the way to bedrock some 1200 m below.This is a result of the high snowfall rate on Law Dome, which leaves a thick layer of snow every year.The disadvantage is that, especially with an icecap only 1200 m thick, the record does not extend as far back in time as some other ice cores.dusts, sea salts, pollution) throughout the planet.Ice cores can be used to investigate past atmospheric conditions by revealing and understanding relationships between modern ice core chemistry and modern instrumental climate data such as atmospheric circulation variables: wind speed and surface pressure).Temperature Interglacial periods are time intervals of warmer global temperatures (~10-20 thousand years) that separate glacial periods.The Holocene is the current interglacial and it has persisted for the last ~11 thousand years.
They only become apparent when the core is analysed for a chemical signal that varies with the seasons, which most signals do, to some extent.
Ice core records have allowed well dated reconstructions of past temperatures over hundreds of thousands of years.
Stable water isotopes, such as deutrium (d D), have a known relationship with temperature and therefore have been used to infer past temperatures.
These all have independent methods of dating, and so the timing of a major climate shift or volcanic eruption can be used to synchronise the age scales.
Most Australian ice core research has been conducted at Law Dome, a small icecap some 200 km in diameter on the coast of Antarctica near Casey station.