In recent years, the shifting patterns of the southwest monsoon and its implications have been spoken about extensively, but the northeast monsoon has, by and large, escaped scrutiny

 A look at the seasonal rainfall levels in recent decades across districts in southern states reveals that the northeastern monsoon has become progressively more bountiful (Courtesy: IMD)
A look at the seasonal rainfall levels in recent decades across districts in southern states reveals that the northeastern monsoon has become progressively more bountiful (Courtesy: IMD)

Weather systems are undergoing a change in India and the proof can be seen in increasingly frequent installments of extreme weather events. This time, it is the northeast monsoon, which is responsible for winter rains over peninsular India and Sri Lanka.

This year, the northeast monsoon has hit southern India with full force. Northern and coastal Tamil Nadu, southeastern Karnataka and the Rayalseema region of southern Andhra Pradesh have all been battered by sustained rainfall. Longstanding records for daily rainfall levels and monthly rainfall for November have been broken in both Bengaluru and Chennai. Between October and the last week of November, three of the four districts in Rayalseema, 11 of the 16 in southern Karnataka and all but eight of the 33 districts in Tamil Nadu and Puducherry have breached 10 per cent excesses with several districts registering even more than twice the normal. While 3-4 days of heavy rainfall and long dry spells are common, this year, the rain has continued with practically no respite for almost a month now.

While heavy rains have lashed parts of all three states, the rain-receiving regions are well-defined and isolated with scanty and below-normal rainfall in all surrounding regions. Interestingly, almost the entire region, which is now struggling to cope with excess rains, received below normal rainfall during the summer monsoon and was staring at water shortages and droughts.

In recent years, the shifting patterns of the Indian monsoon (southwest monsoon) and its implications have been spoken about extensively, but the northeast monsoon has, by and large, escaped scrutiny. The northeast monsoon has been considered a fringe player in the traditional telling of the Indian climate story. Known to bring a few heavy showers amidst scanty rains to the southern states, the winter monsoon in India has flown under the radar for most of its course. In recent years though, the winter rains are stepping out of anonymity and making their presence felt.

The northeast monsoons are caused by retreating monsoon winds that attain moisture from the Bay of Bengal on their way back south from the northeastern region of India. This moisture is responsible for the rains in coastal and southern Andhra Pradesh, Tamil Nadu and parts of Karnataka when the retreating winds move back onto the peninsula between October and December.

The El Niño Southern Oscillation (ENSO), responsible for decadal differential warming in the Pacific Ocean, has been known to impact several weather patterns across the world. Warming due to El Niño is typically characterised by a warm tongue extending westwards from the Eastern Pacific (close to South America). El Niño this year has been the severest ever recorded partly due to the warming of oceans due to global warming phenomena. Warming due to ENSO has been noticed not only in the Pacific Ocean but even in eastern Indian Ocean. The warming affects both the moisture uptake of the winds as well as the path that winds take. In effect, this means the El Niño has an important say in when and where it will rain. Several studies since early 2000s have pointed to a positive correlation between the ENSO and the northeastern monsoon. The unanticipated excessive rains are more evidence pointing to the same trend.

The correlation with ENSO is not the only newly emerging pattern regarding the northeastern monsoon. A look at the seasonal rainfall levels in recent decades across districts in coastal Andhra Pradesh, Karnataka and Tamil Nadu reveals that the northeastern monsoon has become progressively more bountiful.

A study, in journal Theoretical and Applied Climatology in 2012, makes use of homogenous rain gauge data maintained by the Indian Institute of Tropical Meteorology (IITM), to show that winter rains in peninsular India have exhibited a positive rainfall trend of 0.4 mm per day per decade between 1979 and 2010. At the same time, an increase in the number of extreme rainfall days and a decrease of normal rain days have also been observed in several parts of south India.

Climate change is not just affecting the southwest monsoons and India’s rainy season, but is also driving changes in the northeastern monsoons. And if the near-constant flooding in southern states is anything to go by, the country needs to really up its game when it comes to anticipating, preparing and adapting to wet and dry spells of increasing intensity.


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  • Steve Ovett, the famous British middle-distance athlete, won the 800-metres gold medal at the Moscow Olympics of 1980. Just a few days later, he was about to win a 5,000-metres race at London’s Crystal Palace. Known for his burst of acceleration on the home stretch, he had supreme confidence in his ability to out-sprint rivals. With the final 100 metres remaining,

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    Ovett waved to the crowd and raised a hand in triumph. But he had celebrated a bit too early. At the finishing line, Ireland’s John Treacy edged past Ovett. For those few moments, Ovett had lost his sense of reality and ignored the possibility of a negative event.

    This analogy works well for the India story and our policy failures , including during the ongoing covid pandemic. While we have never been as well prepared or had significant successes in terms of growth stability as Ovett did in his illustrious running career, we tend to celebrate too early. Indeed, we have done so many times before.

    It is as if we’re convinced that India is destined for greater heights, come what may, and so we never run through the finish line. Do we and our policymakers suffer from a collective optimism bias, which, as the Nobel Prize winner Daniel Kahneman once wrote, “may well be the most significant of the cognitive biases”? The optimism bias arises from mistaken beliefs which form expectations that are better than the reality. It makes us underestimate chances of a negative outcome and ignore warnings repeatedly.

    The Indian economy had a dream run for five years from 2003-04 to 2007-08, with an average annual growth rate of around 9%. Many believed that India was on its way to clocking consistent double-digit growth and comparisons with China were rife. It was conveniently overlooked that this output expansion had come mainly came from a few sectors: automobiles, telecom and business services.

    Indians were made to believe that we could sprint without high-quality education, healthcare, infrastructure or banking sectors, which form the backbone of any stable economy. The plan was to build them as we went along, but then in the euphoria of short-term success, it got lost.

    India’s exports of goods grew from $20 billion in 1990-91 to over $310 billion in 2019-20. Looking at these absolute figures it would seem as if India has arrived on the world stage. However, India’s share of global trade has moved up only marginally. Even now, the country accounts for less than 2% of the world’s goods exports.

    More importantly, hidden behind this performance was the role played by one sector that should have never made it to India’s list of exports—refined petroleum. The share of refined petroleum exports in India’s goods exports increased from 1.4% in 1996-97 to over 18% in 2011-12.

    An import-intensive sector with low labour intensity, exports of refined petroleum zoomed because of the then policy regime of a retail price ceiling on petroleum products in the domestic market. While we have done well in the export of services, our share is still less than 4% of world exports.

    India seemed to emerge from the 2008 global financial crisis relatively unscathed. But, a temporary demand push had played a role in the revival—the incomes of many households, both rural and urban, had shot up. Fiscal stimulus to the rural economy and implementation of the Sixth Pay Commission scales had led to the salaries of around 20% of organized-sector employees jumping up. We celebrated, but once again, neither did we resolve the crisis brewing elsewhere in India’s banking sector, nor did we improve our capacity for healthcare or quality education.

    Employment saw little economy-wide growth in our boom years. Manufacturing jobs, if anything, shrank. But we continued to celebrate. Youth flocked to low-productivity service-sector jobs, such as those in hotels and restaurants, security and other services. The dependence on such jobs on one hand and high-skilled services on the other was bound to make Indian society more unequal.

    And then, there is agriculture, an elephant in the room. If and when farm-sector reforms get implemented, celebrations would once again be premature. The vast majority of India’s farmers have small plots of land, and though these farms are at least as productive as larger ones, net absolute incomes from small plots can only be meagre.

    A further rise in farm productivity and consequent increase in supply, if not matched by a demand rise, especially with access to export markets, would result in downward pressure on market prices for farm produce and a further decline in the net incomes of small farmers.

    We should learn from what John Treacy did right. He didn’t give up, and pushed for the finish line like it was his only chance at winning. Treacy had years of long-distance practice. The same goes for our economy. A long grind is required to build up its base before we can win and celebrate. And Ovett did not blame anyone for his loss. We play the blame game. Everyone else, right from China and the US to ‘greedy corporates’, seems to be responsible for our failures.

    We have lowered absolute poverty levels and had technology-based successes like Aadhaar and digital access to public services. But there are no short cuts to good quality and adequate healthcare and education services. We must remain optimistic but stay firmly away from the optimism bias.

    In the end, it is not about how we start, but how we finish. The disastrous second wave of covid and our inability to manage it is a ghastly reminder of this fact.