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India’s wind power potential declining due to warming 

Credit:  Press Trust of India | Dec 06 2018 | www.deccanherald.com ~~

The warming of the Indian Ocean due to global climate change may be causing a slow decline in India’s wind power potential, according to a study.

India, the third largest emitter of greenhouse gases behind China and the US, is investing billions in wind power and has set the ambitious goal to double its capacity in the next five years, said researchers from the Harvard John A Paulson School of Engineering and Applied Sciences (SEAS).

The majority of wind turbines are being built in southern and western India to best capture the winds of the summer Indian monsoon, the seasonal weather pattern then brings heavy rains and winds to the subcontinent.

The study, published in the journal Science Advances, found that the Indian monsoon is weakening as a result of warming waters in the Indian Ocean, leading to a steady decline in wind-generated power.

“We found that although India is investing heavily in wind power to tackle climate change and air pollution issues, the benefits of these substantial investments are vulnerable to the changing climate,” said Meng Gao, a postdoctoral fellow at SEAS and the Harvard China Project.

The research calculated the wind power potential in India over the past four decades and found that trends in wind power are tied to the strength of the Indian Summer Monsoon.

In fact, 63 per cent of the annual energy production from wind in India comes from the monsoon winds of spring and summer, researchers said.

Over the past 40 years, that energy potential has declined about 13 per cent, suggesting that as the monsoon weakened, wind power systems installed during this time became less productive, they said.

Western India, including the Rajasthan and Maharashtra states, where investment in wind power is the highest, has seen the steepest decline over that time period, researchers said.

However, other regions, particularly in eastern India, saw smaller or no decline, they said.

“Our findings can provide suggestions on where to build more wind turbines to minimise the influences of climate change,” said Michael B McElroy, a professor at SEAS.

The researchers aim to explore what will happen to wind power potential in India in the future, using projections from climate models.

[Secular decrease of wind power potential in India associated with warming in the Indian Ocean. By Meng Gao, Yihui Ding, Shaojie Song, Xiao Lu, Xinyu Chen, Michael B. McElroy. Science Advances 05 Dec 2018: Vol. 4, no. 12, eaat5256. DOI: 10.1126/sciadv.aat5256]

[download PDFs: article and supplemental material]

[See also:  Wind power vulnerable to climate change in India]

Source:  Press Trust of India | Dec 06 2018 | www.deccanherald.com

This article is the work of the source indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

The copyright of this article resides with the author or publisher indicated. As part of its noncommercial educational effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Send requests to excerpt, general inquiries, and comments via e-mail.

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