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New Delhi: India is likely to experience above-normal cumulative rainfall in the 2024 monsoon season with La Nina conditions likely to set in by August-September, the IMD has said on Monday.

However, normal cumulative rainfall does not guarantee uniform temporal and spatial distribution of rain across the country, with climate change further increasing the variability of the rain-bearing system.

Climate scientists say the number of rainy days is declining while heavy rain events (more rain over a short period) are increasing, leading to frequent droughts and floods.

Based on data between 1951-2023, India experienced above-normal rainfall in the monsoon season on nine occasions when La Nina followed an El Nino event, India Meteorological Department chief Mrutyunjay Mohapatra told a press conference here.

Positive Indian Ocean Dipole conditions are predicted during the monsoon season. Also, the snow cover in the Northern Hemisphere is low. These conditions are favourable for the Indian southwest monsoon, he said.

Moderate El Nino conditions are prevailing at present. It is predicted to turn neutral by the time monsoon season commences. Thereafter, models suggest, La Lina conditions may set in by August-September, Mohapatra said.

India received "below-average" cumulative rainfall -- 820 mm compared to the long-period average of 868.6 mm -- in 2023, an El Nino year. Before 2023, India recorded "normal" and "above-normal" rainfall in the monsoon season for four years in a row.

El Nino conditions -- periodic warming of surface waters in the central Pacific Ocean -- are associated with weaker monsoon winds and drier conditions in India.

Three large-scale climatic phenomena are considered for forecasting monsoon season rainfall.

The first is El Nino, the second is the Indian Ocean Dipole (IOD), which occurs due to differential warming of the western and eastern sides of the equatorial Indian Ocean, and the third is the snow cover over the northern Himalayas and the Eurasian landmass, which also has an impact on the Indian monsoon through the differential heating of the landmass.

The southwest monsoon delivers about 70 percent of India's annual rainfall, which is critical for the agriculture sector. Agriculture accounts for about 14 percent of the country's GDP.

Voting has begun in 88 constituencies across 13 states and Union Territories amid a furious row between the Congress and the BJP over manifesto and inheritance tax. Election will be held on all seats of Kerala, a chunk of Rajasthan and UP.

Key points

Elections for the second phase will be held for 20 seats of Kerala, 14 seats in Karnataka, 13 in Rajasthan, eight each in Uttar Pradesh and Maharashtra, seven in Madhya Pradesh, five each in Assam and Bihar, three each in Bengal and Chhattisgarh and one each in Jammu and Kashmir, Manipur and Tripura.

Earlier, 89 constituencies were expected to vote in this phase. But polling in Betul, Madhya Pradesh, was rescheduled after the death of a candidate from Mayawati's Bahujan Samaj Party. Betul will now vote in the third phase, due on May 7.

Key candidates for this round include the BJP's Union minister Rajeev Chandrashekhar  -- up against Congress' Shashi Tharoor from Thiruvananthapuram; actors Hema Malini, and Arun Govil from 1980s iconic serial Ramayan, senior BJP leader Tejasvi Surya and Lok Sabha Speaker Om Birla,  Congress' Rahul Gandhi, KC Venugopal, Bhupesh Baghel. and Ashok Gehlot's son Vaibhav Gehlot.

For both BJP and the Opposition, the most crucial states in this phase will be Karnataka and Kerala. Karnataka is the only BJP bastion in the south, where the Congress won in the last assembly election. The party is hoping to do well amid concerns about delimitation and the disadvantage southern states could face after it.

Further south, the BJP is trying to break into the bipolar politics of Kerala. The party is hoping to open its account in the state having fielded Union ministers Rajiv Chandrasekhar and V. Muraleedharan. In Wayanand, a Congress bastion for over 20 years, it has fielded its state unit president K Surendran against Rahul Gandhi.

For the Opposition, Kerala is a big shining hope. Even though the Left and the Congress are competing against each other in the southern state, victory by either will add to the tally of the Opposition bloc INDIA. Kerala is one of the few states that have never sent a BJP member to parliament.

With north, west and northeast India saturated, the BJP is hoping to expand in the south and east in their quest for 370 seats. The party had won 303 seats in 2019, a majority of them from the Hindi heartland and bastions new and old, including Gujarat and the northeast.

The Congress, though, has claimed it would post a much better performance compared to 2019. After the first phase of the election, their claims have got louder, especially in Rajasthan and western Uttar Pradesh. Rashtriya Janata Dal chief Tejashwi Yadav has claimed INDIA will win all five seats in Bihar.  

The election is being held amid a bitter face-off between the Congress and the BJP. The row was sparked by Prime Minister Narendra Modi's comment that the Congress, if voted to power, will redistribute the personal wealth of people among "infiltrators" and won't even spare the mangalsutras of women. The Congress has questioned if the people had to fear for their wealth and mangalsutras in 55 years of the party's rule and accused the BJP of sidestepping issues that matter.

The next phase of election is due on May 7. The counting of votes will be held on June 4 – three days after the seventh and last phase of election on June 1.

Palakkad: Three voters from Palakkad, Malappuram and Alappuzha, and a polling agent in Kozhikode died in seperate incidents in Kerala on Friday.

A man collapsed and died after casting his vote at Vani Vilasini in Chunangad, Ottapalam here on Friday. The deceased Chandran (68) hailed from Modernkattil  in Chunangad. Though rushed to the Ottapalam taluk hopsital, he was declared dead on arrival. Palakkad had recorded a high temperature of 40 degree Celsius on Thursday.

A Madrassa teacher, who came home after voting, collapsed and died. The deceased Alikkannakkal Tharakkal Siddhique (63) was the first voter at the polling station in Vallikkanjiram School at Niramaruthur Grama Panchayat in Tirur.

Kakkazham Veiliparambu Somarajan (82), who voted and returned home from the Kakkazham SN VT High School in Alappuzha also collapsed and died. He was a voter from booth 138.

In another instance, a polling agent died after collapsing at a booth in Kuttichira, Kozhikode on Friday. Maliyekkal Anees (66), a retired KSEB engineer from Haluwa Bazaar, was LDF's polling agent at the 16th booth in Kuttichira Government Vocational Higher Secondary School. He collapsed while doing his duty in the polling booth by 8.30 am. Though rushed to the Government General Hospital, he died by 9.15am. He is survived by wife Adakkani Veettil Zereena, childrens  Fayis Ahammed, Fadhil Ahammed, Akhil Ahammed and Bilal Ahammed.

A man also died in bike accident en route to polling booth in Malappuram on Friday. The deceased is Saidu Haji (75) of Neduvan. The bike rammed a lorry near BM School in Parappanangadi.

Polling began at 7am in all 20 Lok Sabha constituencies in Kerala on Friday.