Abstract
Understanding the effects of vegetative land cover in Bangladesh on climatic variability and dynamics is still a critical issue for environmental sustainability as well as global and regional climate policy formulation. This study aimed to gain a better understanding of the responses of vegetation changes and built-up area changes to climatic variability in Bangladesh during 1990–2020. Based on the Normalized Difference Vegetation Index (NDVI) dataset, we analyzed the spatiotemporal characteristics of vegetation dynamics and the proportion of urban land changes across all the urban and rural areas of Bangladesh and investigated the relationships between the variability of temperature, precipitation, and humidity through Pearson’s correlation (PC) and geographically weighted regression (GWR) models. This study found complex variations in growing-season NDVI and climatic factors across the country. The results indicate a declination of vegetation areas and precipitation, with an increase in built-up areas (12.60% in urban and 11.68% in rural areas), temperature, and humidity. The correlation between growing-season NDVI and climatic factors demonstrates a strong inverse influence of temperature up to − 0.78; and positive influences of rainfall up to + 0.51 and humidity up to + 0.06, but in the case of built-up area changes, temperature change is positively correlated, while rainfall and humidity are negatively correlated to built-up expansion. Findings suggest that climatic factors are more responsive to built-up land expansion than vegetation dynamics in the urban and rural areas of Bangladesh. The unplanned development activities would persist and continue to affect the environment and sustainability. This study provides policymakers and the Bangladesh government with critical information on environmental development and sustainability improvements that will lead to the long-term sustainability of natural resources and environmental health.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
We are grateful to Md. Esraz-Ul-Zannat, Assistant Professor, Department of Urban and Regional Planning, for his help regarding the improvement of the quality of the manuscript. We are very much thankful to the employees of the Bangladesh Meteorological Department for providing climatic data. Finally, the authors are very much grateful to the two respected reviewers for their constructive comments, which helped us to improve the quality and readership of this study.
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Conceptualization; writing—original draft preparation; resources; graphs and charts writing—review and editing (Md. Abdul Fattah). Formal analysis and investigation, methodology (Syed Riad Morshed).
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Fattah, M., Morshed, S.R. Assessment of the responses of spatiotemporal vegetation changes to climatic variability in Bangladesh. Theor Appl Climatol 148, 285–301 (2022). https://doi.org/10.1007/s00704-022-03943-7
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DOI: https://doi.org/10.1007/s00704-022-03943-7