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Bad news for renewable sector — study says climate change will hit solar & wind energy in India
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Conducted by researchers from the Indian Institute of Tropical Meteorology, Pune, the study was published in the journal 'Current Science last month.
MOHANA BASU Environment
Representational photo of solar panels | Pixabay
New Delhi: Changing climate patterns over the next 50 years are likely to reduce the generation of solar power in India and affect the major wind power plants in certain regions, says a study by the Indian Institute of Tropical Meteorology (IITM), Pune.
Published in the journal Current Science last month, the study, Analysis of future wind and solar potential over India using climate models, suggests that the renewable energy sector should work on improving the efficiency of solar farms given that radiation is likely to dip by 10 to 15 watts per square metre (sqm) across all seasons.
Seasonal and annual wind speed is likely to decrease over north India and increase along south India, it adds.
The team took into account future climate projections across the globe as predicted by three internationally accepted prediction models — CORDEX-SA, CMIP5, and CMIP6 — to analyse solar and wind potential in India. Each of the models comprises historical climate data, which are used to predict future trends.
“We have tried to show the difference between historical climates and the future scenario. All the models show an overall decrease in wind and solar power generation potential in India,” Parthasarathi Mukhopadhyay, a scientist at IITM, told ThePrint. “Every model has its own uncertainty, but we have used three sets of models to analyse solar and wind potential over the peninsular region.”
For CORDEX and CMIP5 analysis, the historical simulations comprise data from 1951 to 2005, whereas the future climate simulations are analysed from 2006 to 2070. The historical and future model simulations involve data from 1951 to 2015 and from 2016 to 2070, respectively, for the CMIP6 model.
Two climate scenarios — scientifically referred to as RCP 8.5 and RCP 4.5 — were considered for the study.
The first scenario envisages a high-emission situation when there is no concerted effort to cut greenhouse gas emissions. The other is an intermediate scenario where emissions start declining by 2040.
The researchers divided the country into seven regions — the Gangetic plains, eastern, south-eastern, south, western, north-western and central India — for individual analysis.
“In some regions such as western India, all three models show both wind and solar potential are decreasing,” Mukhopadhyay said, adding that all the models showing similar results increase confidence in them.
Keeping in mind the changing pattern in solar radiation, the study suggests central and south-central India must be considered for the sector during pre-monsoon months, as the potential loss was minimum in these regions
“North-western India — the biggest solar energy hub — is likely to see a loss in its energy capacity,” Mukhopadhyay said. “With increasing pollution levels, there will be an increase in aerosols in the environment. This, in turn, increases the cloud lifetime. As a result, the cloud cover is sustained for a long time, which means that solar radiation will be reduced.”
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