Core boring

Core boring is a sampling technique used to research mineral resources in the subsoil by boring wells in order to analyze the ground, and for other digging activities for civil engineering purposes. In core boring a cylinder shaped sample of rock or ice is extracted, which is known as a core.  From these cores it is possible to obtain a large amount of information on the climate variations of the past,  thanks to what remains imprisoned in the ice, such as: gas bubbles, chemical elements that form the ice, sediments, fossils and many other elements. These traces are true witnesses of past periods, and are useful in order to reconstruct the climatic history of the Earth. Ice cores, in fact, maintain the chemical and isotopic characteristics  obtained from the snow in the atmosphere at the time of condensation and precipitation,  characteristics that remain mostly unaltered in the ice. Ice core boring is possible in the internal areas of Greenland and the Antarctic as the temperature always remains below zero and therefore the is no surface fusion, and the snow that accumulates each year forms a regular and continuous stratigraphic succession of layer upon layer of snowfall. With the passing of time the snow is compacted and the empty spaces are decreased and the snow is transformed first into firn or névé and then into ice, the pores become occluded and the air bubbles are trapped and therefore  provide samples of the atmosphere in the past.

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  • air

    The greenhouse effect

    Look

    ecosystems

    Deforestation

    Look
  • air

    Albedo

    Look

    air

    Future scenarios of an increase in the temperature

    Look
  • air

    Icebergs, ice packs and glaciers

    Look

    air

    Mean sea level rise foreseen by IPCC

    Look

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