Rainfall Pattern

Affidavit filed by the Rajasthan State Pollution Control Board illegal and polluting kilns/crucibles along the Haryana-Rajasthan border near the Aravalli range, 01/05/2025

Short affidavit on behalf of the Rajasthan State Pollution Control Board (RSPCB) in terms of the National Green Tribunal order dated January 22, 2025. The application was registered suo motu by the NGT on the basis of a news item titled "Toxic kilns pollution Aravallis; wildlife and locals suffer" appearing …

Searing spell

a severe heat wave swept across the southern, central and northern parts of India in May. More than 1,100 people are said to have succumbed to the scorcher. In Andhra Pradesh, the unusually intense and prolonged heat claimed more than 1,000 lives. This prompted state chief minister Chandrababu Naidu to …

Quantifying the risk of extreme seasonal precipitation events in a changing climate

Increasing concentrations of atmospheric carbon dioxide will almost certainly lead to changes in global mean climate. But because - by defnition-extreme events are rare, it is significantly more difficult to quantify the risk of extremes. Ensemblebased probabilistic predictions, as used in short- and medium term forecasts of weather and climate, …

Indian Ocean Experiment: An integrated analysis of the climate forcing and effects of the great Indo‐Asian haze

Every year, from December to April, anthropogenic haze spreads over most of the North Indian Ocean, and South and Southeast Asia. The Indian Ocean Experiment (INDOEX) documented this Indo-Asian haze at scales ranging from individual particles to its contribution to the regional climate forcing. This study integrates the multiplatform observations …

Catching the infant terrible

A decrease in rainfall over the Indian Ocean may give the world the earliest signal of an impeding strong El Ni

Nature s whims and fancies

have been aware of weather changes now for about 14 to 15 years. I started studying the agricultural system of a part of the Western Ghats, the western part of Ambegaon tehsil of Pune district. Here, I learnt about the rain constellations and their associated rain patterns. The local people …

Pollution tapers off rain

Air pollution causes a decrease in tropical rainfall. The US National Aeronautical and Space Administration (nasa) has discovered an important link between air pollution and rainfall, reports the United Press International. "The concentration of pollution particles redistribute the water inside the clouds into numerous small droplets that are too small …

Arctic meltdown

Global warming is threatening the Earth's thermostat. In the past two decades, average annual temperatures have climbed as much as 4

Awaiting the deluge

as the drought continues to tightens its vise-like grip on the land, killing people and cattle alike, the entire country turns to watching the sky for succor. The fleecy clouds - precusor of the approaching monsoon. This year, Indians have begun their vigil for the arrival of the monsoon earlier …

Reduction of tropical cloudiness by soot

Measurements and models show that enhanced aerosol concentrations can augment cloud albedo not only by increasing total droplet cross-sectional area, but also by reducing precipitation and thereby increasing cloud water content and cloud coverage. Aerosol pollution is expected to exert a net cooling influence on the global climate through these …

Summer squalls...

in recent years, the rainfall pattern in midsummer in the densely populated Tokyo and Yokohama in Japan has changed from gentle to tropical squall-type rainfall, involving sudden, violent winds with torrential downpours. Researchers at Tokyo University's Centre for Climate System Research believe it is due to the "heat island phenomenon", …

Changing weather

scientists believe the world is on the verge of a change in climate patterns that could last 20 to 30 years. "If the trend is confirmed the change could have a major effect on Asia,' says Michel Deque, a climate modelling expert with the French weather service, Meteo France. Scientists …

Fading beauty

nothing in science can account for the way people feel about orchids. Orchids seem to drive people crazy. Those who love them, love them madly, wrote Susan Orlean in Orchid Thief: A true story of beauty and obsession. However, sadly these beautiful flowers are becoming a rarity day by day, …

It is wetter in the south

over the past 22 years, ocean warming has caused an eight per cent increase in rainfall over the Southern Ocean and the South Pacific. Annie Wong, oceanographer at the Antarctic Cooperative Research Centre ( acrc ) in Hobart, Australia, says that warmer ocean temperatures are intensifying the cycle of rainfall, …

Long-period fluctuations in monsoon floods in the Deccan Peninsula, India

In the present study, the temporal patterns of monsoon floods on five large rivers of the Deccan Peninsula have been investigated. Analyses of the long-term annual maximum discharge/state data, available for the last 100 years or so, show non-random behaviour in terms of distinct periods of high and low floods. …

Water balance of Lake Nainital, Kumaun Himalayas

Existence of Lake Nainital has been a matter of debate in the last two decades, because it is the only source of drinking water to Nainital city, a famous tourist resort in northern India. In the tectonically active lake basin, naturally occurring landslides have genered sediments in huge amount. In …

Where the water is

in a bid to boost rural development, engineers in Jaipur have developed a software that would help parched villagers by assisting them predict water supplies. It would also help in proper management of water. The software, called SimTanka , simulates the performance of rainwater harvesting systems with covered water storage …

Signals of the change in monsoonal precipitation at around 2,000 years BP in a sediment core off central west coast of India

A 4.80 m long shallow water sediment core, collected from the inner shelf (at 22 m water depth) off Karwar, near Kali river mouth is studied for foraminiferal tracers of palaeomonsoons. The climate history of this core which represents the last 4,500 years approximately revealed the evidences of a significant …

The onset of the southwest monsoon of 1990

Statistics relating to the date of onset of the southwest monsoon over Kerala for the 100-year period 1891-1990 reveal that the mean and median dates of onset for south Kerala are 31 May and 1 June, with a standard deviation of 8.5 days. Declaring the date of monsoon onset is …

A Parsimonious model for prediction of monsoon rainfall in India

A research paper by Gowariker have used multiple and power regression involving 15 independent variables for long range forecasting of monsoon rainfall in India. They have also argued that, when most of the independent variables are 'favourable' almost invariably the monsoon rainfall is normal. In this note we formalize this …

Promise me the monsoon

 @sunitanar Why this weird weather? Why have western disturbances—the extra-tropical storms that originate in the Mediterranean and Atlantic seas—been lashing us again and again, with devastating impacts on agriculture? Is this normal? Or has weird weather become the new definition of normal? The India Meteorological Department says the severe and …

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