Precipitation indicators of climate change in decline monitoring sites in Chaharmahal and Bakhtiari province

Document Type : Research Paper

Authors

1 Assist., Prof., , Desert Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, I.R. Iran

2 Assoc., Prof., Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, I.R. Iran

3 Assist., Prof., Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, I.R. Iran

Abstract

One of the most important factors affecting the Drought and decay of Zagros forests is the occurrence of climate change. Occurrence of torrential rains and severe droughts puts forest ecosystems under stress and provides a breeding ground for pests and diseases, resulting in degradation and drought. The aim of this study is to investigate the precipitation indices of the global standard for climate change detection in decay monitoring sites in Chaharmahal and Bakhtiari province. For this purpose, daily precipitation data from the nearest synoptic stations to the decay monitoring sites were used for the statistical period of 1991-2019. The data were analyzed for quality and homogeneity and were ready to enter the model. ClimPACT software was used to run the model in R environment. Out of 61 output indices, eight precipitation indices detecting climate change, including: PRCPTOT, CDD, CWD, R10mm, R10mm, RX1day, RX2day, RX5day were extracted. The trend of slope of change, trend slope error and significance of changes were calculated and evaluated on the indicators. The results showed that the annual rainfall fluctuated a lot and between 2006 and 2019, all decay monitoring sites experienced a low rainfall period. Because the study area is located in the second highest rainfall region of the country and benefits from both Mediterranean and Sudanese rainfall systems, the frequency of heavy and super heavy rainfall is high and based on the maximum rainfall indicators of one, two, and five days, there is a potential for heavy flooding in the range of decayed sites. Given the trend of climate change in the current situation and its continuation in the future, recognizing the potential of rainfall and its characteristics can help forest ecosystem managers in the implementation of threat management programs caused by excessive rainfall and flooding and turning it into an opportunity to adapt to climate change in order to preserve and rehabilitate forest trees.

Keywords

References

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Forest and Wood Products
Volume 75, Issue 2
August 2022
Pages 107-117

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