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    STUDIA GEOLOGIA - Ediţia nr.1 din 2007  
         
  Articol:   ISOTOPIC INVESTIGATIONS OF CAVE DRIP WATERS AND PRECIPITATIONS IN FLORIDA, USA.

Autori:  KALI PACE-GRACZYK, BOGDAN P. ONAC, VIOREL ATUDOREI. 		 
       
         
  Rezumat:  Precipitation and in-cave drip waters from speleothems at three caves that transect N-S the Gulf coast of the Florida peninsula have been collected to quantify the variability of the isotopic signal. The study aims to isolate the primary factors that control that isotopic variability both at the site and at regional scale. In addition to weekly water samples, instrumentation inside and outside each cave monitors hourly data on temperature and relative humidity; acoustic loggers acquire data on drip rates beneath active speleothems attached to unfractured blocks of the aquifer matrix. The relationship between the isotopic composition (δ18O and δ2H) of cave waters and meteoric sources is critical for reconstructing paleoclimates using speleothem data. This study will serve as a first of its kind in the southeastern US where the impacts of confounding variables such as temperature, vapor source, storm frequency, and intensity, distance from shore, and soil/water/rock interactions are poorly understood.  
         
     
         
         
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