PALEOCLIMATE MODELING AND IDENTIFICATION OF ANTHROPOGENIC EFFECTS IN HIGH ZAGROS MOUNTAINS

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AKBARI TAYEBEH; LAK RAZIEH; SHAHBAZI REZA; ALIZADEH KAMALODIN; ASADI ASHRAF; GHADIMI MEHRNOUSH

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Journal: Environmental Sciences Year:2015 | Volume:13 | Issue:3 Page(s): 89-102

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Title

PALEOCLIMATE MODELING AND IDENTIFICATION OF ANTHROPOGENIC EFFECTS IN HIGH ZAGROS MOUNTAINS

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Keywords

PALEOCLIMATEQ2

MACROPHYSICAL CLIMATE MODELQ2

PALYNOLOGYQ2

HIGH ZAGROSQ2

IRANQ2

Abstract

In this research we tried to investigate the respond of high part of Zagros Mountains to past climate change by studying a 300cm core was extracted from Lake Gahar. This region is as an important biome of oak forest of IRAN. Then the aim of this investigation is to detect past climate condition by PALYNOLOGY and climate modeling.According to the pollen diagram of Lake Gahar, four main local pollen assemblage zones during Holocene consisting of two older zones GHA (depth of 300 to 290 cm), GHB (290 to 110 cm depth) and two more new zones GHC (depth 110 to 50 cm) and GHD (depth 50 to 0 cm) were identified.We also reconstructed the annual mean precipitation and temperature data over 40000 years by MCM (Macrophysical Climate Model).The results showed that two zones GHA and GHB beyond depth 300-110cm indicate vegetation of forest- steppe with dominant species of oak trees however Quercus pollen is evident in all zones. It seems that the abrupt decreasing of arboreal pollen, especially Quercus at a depth of 50 and 60 cm at the boundary between the two zones GHC and GHD is associated with unfavorable conditions for plant growth during this period. There are also upland herbs pollen types such as Poaceae crealia types and polygonium can be considered as evidence of the destruction of the region as a result of anthropogenic effects and heavy grazing and farming operations. It is also approved the existence of consecutive period of cold/wet and warm/dry period in the past climate of Gahar region by comparing the results of this study with results from other lakes in the northwest of IRAN.

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APA: Copy

AKBARI, TAYEBEH, LAK, RAZIEH, SHAHBAZI, REZA, ALIZADEH, KAMALODIN, ASADI, ASHRAF, & GHADIMI, MEHRNOUSH. (2015). PALEOCLIMATE MODELING AND IDENTIFICATION OF ANTHROPOGENIC EFFECTS IN HIGH ZAGROS MOUNTAINS. ENVIRONMENTAL SCIENCES, 13(3 ), 89-102. SID. https://sid.ir/paper/117262/en

Vancouver: Copy

AKBARI TAYEBEH, LAK RAZIEH, SHAHBAZI REZA, ALIZADEH KAMALODIN, ASADI ASHRAF, GHADIMI MEHRNOUSH. PALEOCLIMATE MODELING AND IDENTIFICATION OF ANTHROPOGENIC EFFECTS IN HIGH ZAGROS MOUNTAINS. ENVIRONMENTAL SCIENCES[Internet]. 2015;13(3 ):89-102. Available from: https://sid.ir/paper/117262/en

IEEE: Copy

TAYEBEH AKBARI, RAZIEH LAK, REZA SHAHBAZI, KAMALODIN ALIZADEH, ASHRAF ASADI, and MEHRNOUSH GHADIMI, “PALEOCLIMATE MODELING AND IDENTIFICATION OF ANTHROPOGENIC EFFECTS IN HIGH ZAGROS MOUNTAINS,” ENVIRONMENTAL SCIENCES, vol. 13, no. 3 , pp. 89–102, 2015, [Online]. Available: https://sid.ir/paper/117262/en

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