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Temperature is the most crucial parameter in determining the impact of climate change. The semi-arid river basins are experiencing many problems due to the intensity and frequency variation of temperature. The current study observed the trends of annual average temperature, crop-seasonal temperature and annual diurnal temperature range (DTR) over the Amaravathi river basin, Tamil Nadu, India, using observed daily data from seven stations during the period of 1985–2020. Non-parametric tests like the sequential Mann–Kendall (SqMK) test and Innovative Trend Analysis (ITA) results revealed that the annual average temperature has a significantly increasing trend, mainly during the years after 2010 and the magnitude has increased very rapidly, signifying the evidence of climate change and global warming. There is an increasing trend for all the stations, excluding Mayanur Station in Kharif season and Uthamapalayam station during Rabi Season. The Diurnal Temperature Range (DTR) exhibited increasing trends except for Kamatchipuram, Viralipatti, and Mayanur stations. Significantly rising trends of seasonal temperature may have a huge impact on the study area’s agricultural production and water availability. This regional-level temperature trend analysis will aid the policymakers in developing new regulations or amendments to existing policies pertaining to achieving the Sustainable Development Goals (SDGs) of SDG 13 (climate action) and SDG 2 (zero hunger).

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Spatio-Temporal Variation of Annual, Crop-Seasonal and Diurnal Temperature Range for Temperature in Amaravathi Basin, Tamil Nadu, India

  • 会议论文

  • 发表日期：

    2025年

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  • S. Hemanandhini,
  • L. Vignesh Rajkumar

摘要

Temperature is the most crucial parameter in determining the impact of climate change. The semi-arid river basins are experiencing many problems due to the intensity and frequency variation of temperature. The current study observed the trends of annual average temperature, crop-seasonal temperature and annual diurnal temperature range (DTR) over the Amaravathi river basin, Tamil Nadu, India, using observed daily data from seven stations during the period of 1985–2020. Non-parametric tests like the sequential Mann–Kendall (SqMK) test and Innovative Trend Analysis (ITA) results revealed that the annual average temperature has a significantly increasing trend, mainly during the years after 2010 and the magnitude has increased very rapidly, signifying the evidence of climate change and global warming. There is an increasing trend for all the stations, excluding Mayanur Station in Kharif season and Uthamapalayam station during Rabi Season. The Diurnal Temperature Range (DTR) exhibited increasing trends except for Kamatchipuram, Viralipatti, and Mayanur stations. Significantly rising trends of seasonal temperature may have a huge impact on the study area’s agricultural production and water availability. This regional-level temperature trend analysis will aid the policymakers in developing new regulations or amendments to existing policies pertaining to achieving the Sustainable Development Goals (SDGs) of SDG 13 (climate action) and SDG 2 (zero hunger).