You are here: Home News In Short New forecast method predicts 2017 Indian Summer Monsoon onset

New forecast method predicts 2017 Indian Summer Monsoon onset

05/08/2017 - Summer Monsoon in central India will likely begin between 14 and 22 June, according to the new early forecast method developed at the Potsdam Institute for Climate Impact Research (PIK). The novel approach based on an analysis of observational data allows to predict the monsoon onset date more than a month in advance in the central part of India where early forecasting has never been made. Elena Surovyatkina lead this study which showed to be successful last year. The monsoon onset date is of crucial importance for Indian farmers feeding a population of more than one billion. Climate change will likely affect monsoon stability and hence makes accurate forecasting even more important.
New forecast method predicts 2017 Indian Summer Monsoon onset

Daily mean near-surface air temperature till May 5,2017 for EG(red) and NP(blue).Violet and grey lines- past 5-years average for same regions.The tipping point (red) indicates the critical temperature and the forecasted onset date. Graph: PIK

“The long-range forecast of the onset and withdrawal dates of monsoon rainfall is critical for taking appropriate decisions at various levels, from farmer’s field to the central government,” says Surovyatkina. “When to plow and seed, but also how to manage water resources and design food procurement policies - in India, all this depends on the Monsoon. We’re therefore glad to complement forecasts by the Indian authorities.”

Although the rainy season happens annually between June and September, the time of monsoon season’s onset and withdrawal varies within a month from year to year. “The important feature of the monsoon is that it starts and ends suddenly. Hence, forecasting it remains a significant scientific challenge," says Surovyatkina. However, this helped me to realize that the sudden onset of monsoon means a threshold behavior, and inspired me to apply the theory of critical transition for a prediction of monsoon.”

The long-term forecast means 40 days in advance for the onset date, and 70 days in advance for the withdrawal date. The prognosis will be provided yearly before and during Monsoon season. Local events such as a pair cyclones from both sides of Indian subcontinent can stop monsoon for a week. Such random events are unpredictable. In such cases, the forecast will be updated. A forecast for the monsoon withdrawal will be issued on 27 July.

Weblink to the PIK monsoon page with more detailed information: https://www.pik-potsdam.de/services/infodesk/forecasting-indian-monsoon

Filed under »

Document Actions

Contact PR

For further information please contact the PIK press office:
Phone: +49 331 288 25 07
E-mail: press@pik-potsdam.de

Would you like to subscribe to our rss feed?
RSS Feed rss feed