Simulating potential impacts of future climate change on post-rainy season sorghum yields in India

Chadalavada, Keerthi and Gummadi, Sridhar and Koteswara Rao, Kundeti and Kadiyala, Dakshina Murthy and Deevi, Kumara Charyulu and Dakhore, Kailas Kamaji and Bollipo Diana, Ranjitha Kumari and Thiruppathi, Senthil Kumar (2021) Simulating potential impacts of future climate change on post-rainy season sorghum yields in India. Sustainability, 14 (1). p. 334. ISSN 2071-1050

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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 CO2 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.

Item Type:	Article
Authors:	Chadalavada, Keerthi and Gummadi, Sridhar and Koteswara Rao, Kundeti and Kadiyala, Dakshina Murthy and Deevi, Kumara Charyulu and Dakhore, Kailas Kamaji and Bollipo Diana, Ranjitha Kumari and Thiruppathi, Senthil Kumar
Document Language:	Language English
Subjects:	Social sciences > Economics > Production > Sustainable development Natural Sciences > Earth sciences > Geology, hydrology, meteorology > Climatology and weather Technology > Agriculture
Divisions:	Azim Premji University - Bengaluru > Research Centre > Centre for Climate Change and Sustainability
Full Text Status:	Public
URI:	http://publications.azimpremjiuniversity.edu.in/id/eprint/7105
Publisher URL:	https://doi.org/10.3390/su14010334

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