Bazrmanesh A, Soltani Koupaei S, Tarkesh Esfahani M, Jafari R. Evaluation of Spatio -Temporal Changes in Leaf Area Index and Land Surface Temperature in the Bioclimatic Regions of Northern Iran. Iranian Journal of Applied Ecology 2024; 12 (4) :75-90
URL:
http://ijae.iut.ac.ir/article-1-1214-en.html
Isfahan University of Technology
Abstract: (409 Views)
The present study aimed to investigate the spatio - temporal changes in Leaf Area Index (LAI) and Land Surface Temperature (LST). This research examined the spatial and temporal trends of LST and LAI across the climatic zones of northern Iran from 2001 to 2022, analyzing the data both seasonally and annually using the remote sensing data from MODIS. To assess the trends in the indices studied, the prewhitened Mann-Kendall test was employed due to the significant autocorrelation present in the time series. The trend slope was calculated using Sen's slope estimator. The results showed that during the study period, the leaf area index (LAI) increased across all bioclimatic zones. In forest ecosystems, a direct relationship between LAI and LST was observed in all seasons. In contrast, rangeland ecosystems exhibited a direct relationship in spring and summer, but an inverse relationship in autumn and winter. The Z-values were 2.825 for forests in humid temperate areas and 2.944 for rangelands in semi-arid, windy regions, both indicating a significant greening trend at a 99% confidence level. Analyzing the relationship between changes in LAI and LST can help develop effective management strategies to enhance ecosystem quality in northern regions and adapt to climate change.
Type of Study:
Research |
Subject:
General