1- Department of Geography Education, Farhangian University, P.O. Box 14665-889, Tehran, Iran , a.shabani@cfu.ac.ir
2- Faculty of Geology, University of Tehran, Iran
3- Department of Geography Education, Farhangian University, P.O. Box 14665-889, Tehran, Iran
2- Faculty of Geology, University of Tehran, Iran
3- Department of Geography Education, Farhangian University, P.O. Box 14665-889, Tehran, Iran
Abstract: (785 Views)
Reconstruction of paleoclimate, including environmental temperature, plays a significant role in understanding the current and future climate. The purpose of this research is to investigate the climatic conditions and calculate the ambient temperature of two sediment cores taken in the Jazmozian basin in the Holocene period. Reconstruction of paleotemperature is done by various methods, one of which is using the value of the standardized variation coefficient of oxygen isotope 18 andcarbon-13. In this regard, the analysis method of oxygen isotopes 18 and 16 andcarbon-13 has been used. At the beginning, there were 46 degrees in Jazmurian core number 1. Then there is a decreasing trend of 10 degrees Celsius up to a depth of 175 cm in 8 levels in the region, at a depth of 175 cm there is an increasing trend and a decrease in the next level and then an increasing and constant trend in the next two levels. In Jazmurian number 2, the temperature is 50 degrees at first, then there is a sharp decrease in temperature at the depth of 80-125 degrees. Then the trend is slightly increased (1 degree) and this temperature continues to the depth of 170, after this there is a decrease in temperature again in the last two layers. The amount of carbon-13 in borehole number 1 varies between 0 and 25.6, and in borehole number 2, the amount of this parameter varies between 25.9 and 27.1. In this area, in core number 1, the value of 6 carbon 13 isotope samples is zero, which indicates the absence of carbon 13 isotope in the sediments. In core number 2, the range of changes is not relatively large. In this region, different temperatures with different amounts of isotopes and different climatic periods can be seen in the Holocene. These climatic changes are usually associated with cultural changes and the decline of civilizations is related to climate change. It seems that the data of this research will be used by archeology researchers such as the ancient civilizations of Iran
Type of Study: Research |
Subject:
climatology
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This work is licensed under a Creative Commons — Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)