Climatic and Environmental Reconstruction Based on Stable Isotopes of Parishan Lake (Iran)

Abstract

The isotopic documents of lake deposition are suitable potential means for studying<br />the intercontinental, environmental and climatic conditions. In order to study the<br />environmental and climatic conditions of Parishan area in Fars province in Holocene, a Core<br />was taken with the length of 2m from the Parishan lake sediment. From this core, kernel time<br />series was provided from documents of carbon and oxygen isotopes. Results show that during<br />the study period, climatic changes because gradual increasing in the value of ∂O18<br />carb. This<br />represents a weak dryness process in the area up to now. Contrary to this, carbon isotope<br />documents during the study period show the more vigorous changes. Variability of ∂C13<br />carb<br />values during the study period is known as the result of changes in the value of evacuation of<br />underground waters to the lake. As it is observed in the process at ∂O18<br />carb throughout the<br />study period, ∂C13<br />carb values have an increasing process, yet the observed changes in ∂C13<br />carb<br />value are more vigorous than ∂O18<br />carb and it seems that variation of underground waters was<br />not in complete harmony with dryness process of the area. It seems that achievement of<br />underground waters around the lake in the form of well and aqueduct is the intensify factor<br />for the reduction of underground inputs to the lake.