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Chemical Communications – Where on Earth has our water come from?
The presence of water in the Earth has long been an enigma. However, computer modelling techniques have shown that the adsorption of water onto the fractal surfaces of interplanetary dust particles, which are present in the planetary accretion disk, is sufficiently strong to provide a viable origin of terrestrial water.
New Scientist – water may after all have been present in Earth’s building blocks.
“Some of the Earth’s water probably came from this source, and quite possibly most of it,” says co-author Michael Drake of the University of Arizona, Tucson. As the planet coalesced from the dust, pressures and temperatures would have grown high enough to detach the water from the grains, freeing it up to become streams and oceans.
Researchers have shown that the world’s tropical forests thrived in the far distant past when temperatures were 3 to 5C warmer than today.
They believe that a wetter, warmer future may actually boost plants and animals living the tropics.
The findings, published in the respected journal Science, come from a study of pollen trapped in rocks during a natural period of global warming 56.3million years ago.
The extreme warm spell – called the Paleocene-Eocene Thermal Maximum – saw global temperatures soar by 6C (11F) within a few thousand years.
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Brian Wang is a Futurist Thought Leader and a popular Science blogger with 1 million readers per month. His blog Nextbigfuture.com is ranked #1 Science News Blog. It covers many disruptive technology and trends including Space, Robotics, Artificial Intelligence, Medicine, Anti-aging Biotechnology, and Nanotechnology.
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