Calibration of speleothem δ18O with instrumental climate records from Turkey

Research output: Contribution to journalArticle


  • A Baker
  • MJ Leng
  • HJ Sloane
  • L Thomas
  • E Bekaroğlu


Stalagmite records of oxygen (delta O-18) isotopes, sampled at sub-annual resolution by micro-mill techniques are correlated with climate parameters over the instrumental period (1961 to 2005 AD). The strongest correlations were found between delta O-18 and total amount of late autumn-winter precipitation (October to January) smoothed by 6 yr, with marginally weaker correlations between the total amount of late autumn-spring precipitation (ONDJF and ONDJFMA) smoothed over the same time period. Two smoothing options were chosen to account for variability in mixing and residence times of stored water in the karst aquifer prior to entering the cave: (1) An average of the last 6 yr of precipitation which yielded a product correlation of -0.71 for the months ONDJ; and (2) a mixing model of 10% short term/event water (


Original languageEnglish
Pages (from-to)207-217
Number of pages11
JournalGlobal and Planetary Change
Issue number3-4
Publication statusPublished - 1 Apr 2010


  • climate calibration, speleothem, Turkey, stable isotopes