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News articles about "Sediments"

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

Water cycle amplifies abrupt climate change

During the abrupt cooling at the onset of the so called Younger Dryas period 12680 years ago changes in the water cycle were the main drivers of widespread environmental change in western Europe Thus the ... - Read More

Large landmasses existed 2.7 billion years ago

Some 71% of Earth's surface is covered by oceans and 29% by land The question of when large landmasses emerged from the oceans has always been hotly debated by scientists New investigations by geoscientists of ... - Read More

Acid mine drainage reduces radioactivity in fracking waste

Acid
Much of the naturally occurring radioactivity in fracking wastewater might be removed by blending it with another wastewater from acid mine drainage according to a Duke University led study Fracking wastewater and acid mine drainage ... - Read More

Risk assessment for pesticides in EU unsuitable for use in field

Risk assessment
The method used to approve pesticides in the EU needs to be revised This was confirmed by a recent study by the Institute for Environmental Sciences Landau According to the study the level of fungicides ... - Read More

Industrial age helps some coastal regions capture carbon dioxide, surprise finding shows

carbon, Carbon dioxide, Carbon dioxide, Carbon
Coastal portions of the world's oceans once believed to be a source of carbon dioxide CO2 to the atmosphere are now thought to absorb as much as two thirds more carbon than they emitted in ... - Read More

Tracking fracking pollution

As a result of the fracking revolution North America has overtaken Saudi Arabia as the world's largest producer of oil and gas This despite endless protests from environmentalists But does drilling for natural gas really ... - Read More

Microplastics make marine worms sick

marine, Marine
Tiny bits of plastic trash could spell big trouble for marine life starting with the worms say a team of researchers from Plymouth University and the University of Exeter who report their evidence in a ... - Read More
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