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Geologists may have to revise their ideas about what goes on in the Earth’s interior, following the publication today of new research in the journal ’Nature’. It appears that contrary to previous belief, part of the interior has remained undisturbed for at least two-and-a-half billion years, in spite of the massive forces at work inside the planet.
Like a saucepan of thick syrup being heated on the stove, huge convection currents within the Earth, generated by heat from the co
A new array of ocean robots has begun working deep in the Indian Ocean to help scientists understand Australia’s changing climate.
“This is a key region for the global climate system and installation of the robots will provide our best coverage to begin to understand how the Indian Ocean affects our climate,” says CSIRO’s Dr Gary Meyers.
Cycling between the surface and a depth of two kilometres every 10 days, the ocean robots are sampling conditions in a region thought to
At best, a yachtsman far out to sea experiences an exhilarating solitude to equal any space traveller. But too much isolation at sea can give rise to loneliness, disorientation and multiple dangers.
A new ESA-developed technology enables boat crews to check their positions, stay in constant contact with shore, receive urgent emergency warnings, and enable friends and family to remotely track them on the internet.
If a boat becomes dangerously water-logged or its power system is o
Scientists have shown, for the first time, that changes in a large-scale climate system can synchronize population fluctuations in multiple mammal species across a continent-scale region. The study, to be published in the 14 November 2002 issue of the journal Nature, compares long-term data on the climate system known as the North Atlantic Oscillation with long-term data from Greenland on the population dynamics of caribou and muskoxen, which are large mammals adapted to breeding in the Arctic.
From 800 km in space, you would have to squint really hard to see one of these – a micron-sized phytoplankton and its armoured shell. But when a lot of them get together, say, a few trillion or so…
…what you see is the image below from the European Space Agency’s Medium Resolution Imaging Spectrometer (MERIS) instrument. The sensor, carried onboard the Envisat satellite, acquired imagery of a phytoplankton bloom that occurred this summer in the north Atlantic, off the coasts of Nova Scotia
Analysis of long-term changes in Pacific Ocean temperatures may provide additional data with which to evaluate global warming hypotheses.
“Abrupt changes in water temperatures occurring over intervals of up to 25 years suggest that global warming may result as much from natural cyclical climate variations as from human activity,” said Benjamin Giese, oceanography professor in the College of Geosciences.
“Climate models constructed here at Texas A&M University were used to a