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News articles about "Sediments"

Breathing sand: New measurement technique detects oxygen supply to bottom of North Sea

New analytical methods show for the first time how the permeable sandy sediment at the bottom of the North Sea is supplied with oxygen and which factors determine the exchange Because the metabolic rate is ... - Read More

Evidence for huge mountains that fed early life discovered

Scientists have found evidence for a huge mountain range that sustained an explosion of life on Earth 600 million years ago The mountain range was similar in scale to the Himalayas and spanned at least ... - Read More

Scientists find ancient mountains that fed early life

Scientists have found evidence for a huge mountain range that sustained an explosion of life on Earth 600 million years ago The mountain range was similar in scale to the Himalayas and spanned at least ... - Read More

Carbonate rocks are unrecognized methane sink

Since the first undersea methane seep was discovered 30 years ago scientists have meticulously analyzed and measured how microbes in the seafloor sediments consume the greenhouse gas methane as part of understanding how the Earth ... - Read More

A unique approach to monitoring groundwater supplies near Ohio fracking sites

A University of Cincinnati research project is taking a groundbreaking approach to monitoring groundwater resources near fracking sites in Ohio Claire Botner a UC graduate student in geology will outline the project at The Geological ... - Read More

Nanoparticles accumulate quickly in wetlands: Aquatic food chains might be harmed by molecules 'piggybacking' on carbon nanoparticles

A Duke University team has found that nanoparticles called single walled carbon nanotubes accumulate quickly in the bottom sediments of an experimental wetland setting an action they say could indirectly damage the aquatic food chain ... - Read More

Declining levels of acidity in Sierra Nevada lakes, study concludes

California's water supply depends on a clean snow pack and healthy mountain lakes The lakes receive a large amount of runoff in the spring from the melting snowpack If the snowpack is polluted the lakes ... - Read More

Ironing out details of the carbon cycle: Dissolved iron in North Atlantic traced to Sahara desert

Iron is present in tiny concentrations in seawater On the order of a few billionths of a gram in a liter I did a calculation once on a ton of ocean water says Seth John ... - Read More

Ancient Arctic sharks tolerated brackish water 50 million years ago

Sharks were a tolerant bunch some 50 million years ago cruising an Arctic Ocean that contained about the same percentage of freshwater as Louisiana's Lake Ponchatrain does today says a new study involving the University ... - Read More

Ancient ocean currents may have changed pacing and intensity of ice ages: Slowing of currents may have flipped switch

For decades climate scientists have tried to explain why ice age cycles became longer and more intense about 900 000 years ago switching from 41 000 year cycles to 100 000 year cycles In a ... - Read More

Marine Bacteria Are Natural Source of Chemical Fire Retardants

Released 6 25 2014 12 00 PM EDTEmbargo expired 6 29 2014 1 00 PM EDTSource Newsroom University of California San Diego Health Sciences more news from this source Contact Information Available for logged in ... - Read More

Modern ocean acidification is outpacing ancient upheaval: Rate may be ten times faster

Some 56 million years ago a massive pulse of carbon dioxide into the atmosphere sent global temperatures soaring In the oceans carbonate sediments dissolved some organisms went extinct and others evolved Scientists have long suspected ... - Read More

Solving the puzzle of ice age climates: Southern Ocean and explanation for 'Last Glacial Maximum'

The paleoclimate record for the last ice age a time 21 000 years ago called the Last Glacial Maximum LGM tells of a cold Earth whose northern continents were covered by vast ice sheets Chemical ... - Read More

Babbling brooks adding to climate change?

Studying stream bubbles isn't exactly a walk in the park What with the mud and ticks the long days hiking and swimming through mucky streams the sun exposure and scratching brush But in the end ... - Read More

Richest marine reptile fossil bed along Africa's South Atlantic coast is dated at 71.5 mya

A new study uses carbon isotope dating to determine the first precise age for this bed and ties the western coast of Africa to 30 million years of global geologic records Paleontologists at Southern Methodist ... - Read More

Rhode Island: Nitrogen cycle differs in bay and sound

A new study reports that anammox a key process in the nitrogen cycle is barely present in Narragansett Bay even though it's a major factor just a little farther out into Rhode Island Sound Scientists ... - Read More

Reconstructed ancient ocean reveals secrets about the origin of life

Researchers from the University of Cambridge have published details about how the first organisms on Earth could have become metabolically active The results which are reported in the journal Molecular Systems Biology permit scientists to ... - Read More

'Super bacteria' clean up after oil spills

Norwegian researchers in Trondheim have achieved surprising results by exploiting nature's own ability to clean up after oil spills Scientists know that marine bacteria can assist in cleaning up after oil spills What is surprising ... - Read More

A shocking diet: Researchers describe microbe that 'eats' electricity

There have been plenty of fad diets that captured the public's imagination over the years but Harvard scientists have identified what may be the strangest of them all sunlight and electricity Led by Peter Girguis ... - Read More

Sun's energy influences 1,000 years of natural climate variability in North Atlantic

Changes in the sun's energy output may have led to marked natural climate change in Europe over the last 1000 years according to researchers at Cardiff University The study found that changes in the Sun's ... - Read More
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