Gujarat has recently experienced heavy rainfall, a phenomenon that has become more common due to climate change. The changing patterns of rainfall are causing concern among residents and researchers alike. Traditionally, the monsoon season in Gujarat spans four months, but now a significant portion of this rain falls in just June. This shift is alarming as it leads to severe flooding in urban areas, particularly in cities like Vadodara.
In the past, cyclones coming from Tamil Nadu would affect the region, but now they mostly travel through Madhya Pradesh. During the monsoon, clouds from the Madden-Julian Oscillation also contribute to rainfall in Gujarat. Researchers at the Maharaja Sayajirao University of Baroda have noted that the climate patterns are changing rapidly, impacting the entire ecosystem.
Understanding how the monsoon works in Gujarat is essential. The state receives its rains primarily from low-pressure systems that develop over the Bay of Bengal and the Arabian Sea. These systems typically occur five to six times a year when air pressure drops to around 1,000 millibars. The southwest monsoon enters Gujarat after passing through Kerala and Maharashtra, bringing rainfall.
The temperature of the Indian Ocean also plays a role in Gujarat’s monsoon, especially phenomena known as La Niña and El Niño. Additionally, the Indian Ocean Dipole (IOD) affects the rainfall patterns, with temperature differences in the Arabian Sea and Bay of Bengal significantly impacting weather conditions.
Weather analyst Mukesh Pathak explains that the Madden-Julian Oscillation, a large group of clouds that circulates the Earth, typically passes over India two to three times during the monsoon season, bringing rain. Cyclones form when air pressure increases in low-pressure systems, and they can develop into storms that impact Gujarat.
In recent years, the rainfall patterns have changed drastically. Historically, southern Gujarat received the most rain, but regions like Kutch now experience sudden heavy downpours. For example, the Hamirsar Lake in Bhuj, which rarely filled up, now often brims with water during the monsoon. This dramatic shift indicates the effects of climate change.
Data shows that in Vadodara, nearly a quarter of the annual rainfall now occurs in June alone. This has led to a situation where flooding is common. For instance, on June 29, 2005, Vadodara received 238 millimeters of rain in a single day, surpassing the average monthly rainfall for June.
Urbanisation and industrialisation are significant contributors to climate change. The rise in temperatures due to urban heat islands affects rainfall distribution, leading to instances where one area may experience heavy rain while another remains dry. This problem is exacerbated by the interaction between the land surface and the atmosphere, affecting local temperatures and weather patterns.
The research from the Maharaja Sayajirao University highlights these alarming trends. Urban areas like Vadodara have seen a massive increase in constructed land from 8% in 1978 to 68% in 2018. Such changes influence weather patterns and contribute to flooding.
Prime Minister Narendra Modi has initiated a mission called “Mission Life” aimed at protecting nature. It is crucial for citizens to embrace this initiative to safeguard the environment and mitigate the effects of climate change. The recent heavy rains in Gujarat serve as a reminder of the urgent need for action in tackling climate change and its impacts on our daily lives.