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Simulating Potential Impacts of Future Climate Change on Post-Rainy Season Sorghum Yields in India

Author

Listed:
  • Keerthi Chadalavada

    (Department of Botany, Bharathidasan University, Tiruchirappalli 620024, India
    International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru 502324, India)

  • Sridhar Gummadi

    (CGIAR Research Program for Climate Change, Agriculture and Food Security (CCAFS), International Rice Research Institute (IRRI), IRRI-CCAFS Office, Agricultural Genetics Institute, Hanoi 03000, Vietnam)

  • Koteswara Rao Kundeti

    (Center for Climate Change and Sustainability, Azim Premji University, Bengaluru 562125, India)

  • Dakshina Murthy Kadiyala

    (Department of Agronomy, Acharya NG Ranga Agricultural University, Guntur 522034, India)

  • Kumara Charyulu Deevi

    (International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru 502324, India)

  • Kailas Kamaji Dakhore

    (All India Coordinated Research Project on Agrometeorology, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani 431402, India)

  • Ranjitha Kumari Bollipo Diana

    (Department of Botany, Bharathidasan University, Tiruchirappalli 620024, India)

  • Senthil Kumar Thiruppathi

    (Department of Botany, Bharathidasan University, Tiruchirappalli 620024, India)

Abstract

Given the wide use of the multi-climate model mean (MMM) for impact assessment studies, this work examines the fidelity of Coupled Model Intercomparison Project Phase 5 (CMIP5) in simulating the features of Indian summer monsoons as well as the post-rainy seasons for assessing the possible impacts of climate change on post-rainy season sorghum crop yields across India. The MMM simulations captured the spatial patterns and annual cycles of rainfall and surface air temperatures. However, bias was observed in the precipitation amounts and daily rainfall intensity. The trends in the simulations of MMM for both precipitation and temperatures were less satisfactory than the observed climate means. The Crop Environment Resource Synthesis (CERES)-sorghum model was used to estimate the potential impacts of future climate change on post-rainy season sorghum yield values. On average, post-rainy season sorghum yields are projected to vary between −4% and +40% as well as +10% and +59% in the near future (2040–2069) for RCP 4.5 and RCP 8.5, respectively, and between +20% and +70% (RCP 4.5) as well as +38% and +89% (RCP 8.5) in the far future (2070–2099). Even though surface air temperatures are increasing in future climate change projections, the findings suggest that an increase in the post-rainy season sorghum yields was due to an increase in the rainfall amounts up to 23% and an increase in the atmospheric CO 2 levels by the end of the 21st century. The results suggest that the projected climate change during the post-rainy season over India is an opportunity for smallholders to capitalize on the increase in rainfall amounts and further increase sorghum yields with appropriate crop management strategies.

Suggested Citation

  • Keerthi Chadalavada & Sridhar Gummadi & Koteswara Rao Kundeti & Dakshina Murthy Kadiyala & Kumara Charyulu Deevi & Kailas Kamaji Dakhore & Ranjitha Kumari Bollipo Diana & Senthil Kumar Thiruppathi, 2021. "Simulating Potential Impacts of Future Climate Change on Post-Rainy Season Sorghum Yields in India," Sustainability, MDPI, vol. 14(1), pages 1-24, December.
    • Handle: RePEc:gam:jsusta:v:14:y:2021:i:1:p:334-:d:713575
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    References listed on IDEAS

    as
    1. Clara W. Mundia & Silvia Secchi & Kofi Akamani & Guangxing Wang, 2019. "A Regional Comparison of Factors Affecting Global Sorghum Production: The Case of North America, Asia and Africa’s Sahel," Sustainability, MDPI, vol. 11(7), pages 1-18, April.
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