The study uses a “climate network”, in which locations are treated as points, or nodes, and links connect locations where local rainfall has begun
Using 84 years of rainfall data, the researchers found that the large-scale monsoon onset typically occurs around May 15 over Northeast India and June 9 over the Indian peninsula.
Chennai: Researchers at the Indian Institute of Technology Madras and Gauhati University, Assam, have developed a method to tell a short-lived local rain spell from the arrival of the sustained, large-scale monsoon at a given place, according to a statement from IIT Madras. The study uses a “climate network”, in which locations are treated as points, or nodes, and links connect locations where local rainfall has begun. “The monsoon’s arrival at a location is not necessarily the first rainfall experienced there,” said R I Sujith, Head of the Centre of Excellence for Studying Critical Transitions in Complex Systems at IIT Madras.
The findings, published in the Journal of Climate, a peer-reviewed journal of the American Meteorological Society, describe how the researchers tracked clusters of these local rainfall starts as they grow, move and join up across India. The method defines onset at a location as the point when its local rainfall joins the largest, planet-scale cluster of connected rainfall onsets. The rain is then part of the broader monsoon system, rather than being driven only by a passing local weather event. The peninsular onset was followed by a strong northward push of rain tied to the first pulse of the monsoon intraseasonal oscillation (MISO), a cycle of active and weak rain spells within the season. You Can Also Check: Gold Rate in Chennai | Silver Rate in Chennai | Bank Holidays in Chennai | Public Holidays in Chennai | Chennai AQI | Weather in Chennai | Petrol Price in Chennai | Diesel Price in Chennai | CNG Price in Chennai | LPG Price in Chennai