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    STUDIA GEOLOGIA - Ediţia nr.1 din 2007  
         
  Articol:   STABLE ISOTOPES IN CAVE ICE: WHAT DO THEY TELL US?.

Autori:  AUREL PERŞOIU, ANA-VOICA BOJAR, BOGDAN P. ONAC. 		 
       
         
  Rezumat:  In the context of recent climate changes, our understanding of the climate of the past two millennia has become more important, as the changes we witness can be placed in a longer-term context, helping us decipher both natural and anthropogenic forcing on the climate system. So far, ice cores proved to be one of the most reliable sources of paleoclimatic information, as they can provide an accurate view of past atmospheric composition and circulation, air temperature and precipitation amount, and magnitude of solar variability. They are available from Polar Regions, as well as from tropical and mid-latitude mountain glaciers, but are missing from a large fraction of the Earth surface. Recently, at the First International Workshop on Ice Caves (Cluj Napoca, 2004), a new direction emerged in ice core science: the use of ice deposits from caves in paleoclimatic reconstructions. Previous studies (Racoviţă and Onac, 2000; Holmlund et al., 2005; Luetscher et al., 2005) suggested that ice accumulations in caves might contain paleoclimatic information, therefore we have tested this hypothesis on the ice block from Scărişoara Cave. This paper is concerned with various aspects regarding stable isotope measurements on rainfall, newly formed and fossil cave ice, and on cryogenic cave calcite (CCC) deposited during the ice formation.  
         
     
         
         
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