Greenhouse gas concentrations in the atmosphere hit new record highs in 2022, with no end in sight to the rising trend, according to this new report by the World Meteorological Organisation (WMO). This Bulletin represents the latest analysis of observations from the WMO GAW Programme. It shows globally averaged surface …
weather forecasters will now need to track atmospheric dust to predict hurricanes. Dust may dampen hurricane fury, say scientists at the University of Wisconsin-Madison, studying a link between Atlantic hurricanes and thick clouds of dust that periodically rise from the Sahara Desert and blow off Africa's western coast. A strong …
India witnesses hotter summers, shorter winters. Shape of things to come? Carbon dioxide accumulating in the atmosphere is held as one of the primary reasons for glaciers melting but it could also be wreaking havoc with the climate. The projected rate of warming is much higher than the observed changes …
rapid atmospheric warming is causing a widening of the tropical region, according to a team of researchers led by the University of Washington in the us . The scientists analysed satellite data from 1979 to 2005 on temperature over subtropical areas (between 23.5
the European Space Agency (esa) has come out with a world fire atlas based on satellite data on forest fires collected over a decade. The maps are available to users online in near-real time (within six hours of a fire). The data was taken from instruments called Along Track Scanning …
The us has perpetually been in denial about global warming, especially after the Earth Summit in Rio De Janerio held in 1992, but a recent report released by the us Climate Change Science Program (ccsp) may shake it out of its complacency. The report adds ammunition for lobbies within the …
india has set up a new Earth Commission and renamed its Union ministry of ocean development the Union ministry of earth sciences. The move is important since it is seen as the the first step of the Indian government to integrate all researches on land, ocean and atmoaspheric systems. "The …
Scientists from 10 countries are conducting an experiment to demystify the life cycle of tropical clouds. Under the experiment, 1,000 weather balloons have been released over the past two months in Australia's northern city of Darwin to study cirrus, the wispy white clouds found at high altitudes. "Cirrus are ubiquitous …
scientists at the us National Center for Atmospheric Research (ncar) have begun an experiment to evaluate cloud seeding, a precipitation enhancement technique mired in controversy. The five-year, us $8.8 million project will be carried out in Wyoming, which has been experiencing drought for years in a row, according to ncar …
Why has the Asian Brown Cloud now become the Atmospheric Brown Cloud? Brown clouds have been seen all over the world, including the us , Europe, India and China. Earlier, our focus was on South Asia; so we called these clouds the Asian Brown Cloud. Several Indian scientists and politicians …
Being an integral effect of sub-seasonal rain spells over the season, the seasonal mean south Asian monsoon (SAM) rainfall could be affected by change in the length of the rainy season (LRS). An objective definition of the duration of the SAM season has, however, been lacking. Here we show that …
the capacities of the land and oceans to act as repositories for anthropogenic carbon dioxide (co2) may be limited if we maintain or accelerate our current course of fossil fuel emissions, according to a us study. Using a new generation computer carbon-climate model, the study conducted at Berkeley University shows …
The southwest monsoon current in the form of a crossequatorial low level jetstream (LLJ) with its core at an altitude of about 1.5 km and core wind speeds of 80
Charles David Keeling, the climate scientist whose meticulous measurements of atmospheric carbon dioxide (co2) levels warned of human activity changing the composition of the atmosphere, is no more. He died of a heart attack on June 20, 2005. "Keeling's measurements of global co2 levels are the single most important environmental …
South Asian emissions of fossil fuel SO2 and black carbon increased 6-fold since 1930, resulting in large atmospheric concentrations of black carbon and other aerosols. This period also witnessed strong negative trends of surface solar radiation, surface evaporation, and summer monsoon rainfall. These changes over India were accompanied by an …
function loop() { var popurl="image/20040630/32-illus.jpg" winpops=window.open(popurl,"","width=430,height=375,scrollbars=yes") } In nature, nitrogen remains constant. The Earth's atmosphere has 78 per cent nitrogen, but very little of this vital nutrient can be absorbed by plants. A chain of chemical reactions deposits atmospheric nitrogen in rain and then takes it to the soil. Nitrogen-fixing …
function chart() { var popurl="files/images/20040630/28-illus.jpg" winpops=window.open(popurl,"","width=650,height=350,scrollbars=yes") } Over the ages, human civilisations have excelled and fallen depending on the availability and use of limited resources. Fossil fuels, minerals, land, freshwater and food are often the measuring sticks of relative wealth. These limited resources determine just how long exploitation can continue …
