Temperature and Climate Dynamics in National Capital Region of India

https://doi.org/10.22146/ijg.96393

Areesha Areesha(1), Pankaj Chauhan(2*), Rizwan Ahmed(3), Sanjukta Bhaduri(4), Dharmaveer Singh(5), Md Kaikubad Ali(6)

(1) Interdisciplinary Department of Remote Sensing and GIS Applications, AMU, Aligarh-202002, India
(2) Department of Glaciology and Environmental Geology, Wadia Institute of Himalayan Geology, Dehradun-248001, India and Academy of Scientifi and Innovative Research (AcSIR), Ghaziabad-201002, India
(3) Interdisciplinary Department of Remote Sensing and GIS Applications, AMU, Aligarh-202002, India
(4) Academy of Scientifi and Innovative Research (AcSIR), Ghaziabad-201002, India
(5) Department of Geo-informatics, Symbiosis International (Deemed University), Pune-412115, India
(6) 
(*) Corresponding Author

Abstract


Climate change and increase in global surface temperature are growing concerns worldwide, especially big urban agglomerations like National Capital Region of India, New Delhi and surrounding region have experienced exponential urbanization paving way to horizontal spilling of urban built-up areas, which consequently amplifid the climate variability and surface temperature change over the past few decades. Threfore, the city is highly susceptible to several climate extremes, including heat waves, cold waves, droughts, and flods, impacting socioeconomic lives of over 20 million population. In this study, we applied remote sensing and GIS approaches to study climate variability and its impacts on urban areas. Indicators such as the Land Surface Temperature (LST), Urban Heat Islands (UHI), Normalized Diffrence Vegetation Index (NDVI), and Land Use Land Cover (LULC), were calculated using satellite data for the years 1993, 2000, 2010, and 2020. Th result shows that LST values sharply rose as the maximum value reached 6.9°C in the last three decades (1993-2020), and UHIs maximum values reached 1.76, indicating a clear warming trend in the study area. During this period, the NDVI levels have decreased considerably, going from 0.59 to 0.21, which can be attributed to the expanding urbanization and the decreased green area. Th LULC loss and gain analysis revealed that the urban area has rapidly expanded. In contrast, it resulted in loss of agricultural land, barren and scrubs, water bodies and forest area. Th results show vast climate variability in the region posing threat to environment and socio-economic livelihood of the population.

Keywords


Climate variability; Climate change; Global warming; UHI; LST; Geospatial approaches



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DOI: https://doi.org/10.22146/ijg.96393

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