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News articles about "Oceans"

Sharks in acidic waters avoid smell of food

The increasing acidification of ocean waters caused by rising atmospheric carbon dioxide levels could rob sharks of their ability to sense the smell of food a new study suggests Elevated carbon dioxide levels impaired the ... - Read More

Carbon dioxide concentration surges: Record greenhouse gas levels impact atmosphere and oceans, WMO report finds

The amount of greenhouse gases in the atmosphere reached a new record high in 2013 propelled by a surge in levels of carbon dioxide This is according to the World Meteorological Organization's annual Greenhouse Gas ... - Read More

Life forms appeared at least 60 million years earlier than previously thought

Geologists from Trinity College Dublin have rewritten the evolutionary history books by finding that oxygen producing life forms were present on Earth some 3 billion years ago a full 60 million years earlier than previously ... - Read More

Atmospheric Mercury Review Raises Concerns of Environmental Impact

Released 28 Aug 2014 10 00 AM EDTSource Newsroom University of Arkansas at Little Rock more news from this source Expert Available Contact Information Available for logged in reporters only Citations Energy and Emissions Control ... - Read More

SAR11, oceans' most abundant organism, has ability to create methane

The oxygen rich surface waters of the world's major oceans are supersaturated with methane a powerful greenhouse gas that is roughly 20 times more potent than carbon dioxide yet little is known about the source ... - 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

NASA launches carbon mission to watch Earth breathe

NASA successfully launched its first spacecraft dedicated to studying atmospheric carbon dioxide at 2 56 a m PDT 5 56 a m EDT Tuesday July 1 2014 The Orbiting Carbon Observatory 2 OCO 2 raced ... - 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

Insights from nature for more efficient water splitting

Water splitting is one of the critical reactions that sustain life on earth and could be a key to the creation of future fuels It is a key in the process of photosynthesis through which ... - 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

No limits to human effects on clouds

Understanding how clouds affect the climate has been a difficult proposition What controls the makeup of the low clouds that cool the atmosphere or the high ones that trap heat underneath How does human activity ... - 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

Reducing emissions will be primary way to fight climate change, study finds

Forget about positioning giant mirrors in space to reduce the amount of sunlight being trapped in Earth's atmosphere or seeding clouds to reduce the amount of light entering earth's atmosphere Those approaches to climate engineering ... - 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

Buried fossil soils found to be awash in carbon

Soils that formed on Earth's surface thousands of years ago and that are now deeply buried features of vanished landscapes have been found to be rich in carbon adding a new dimension to our planet's ... - 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

Fate of methane following Deepwater Horizon spill examined by researchers

The 2010 Deepwater Horizon blowout discharged roughly five million barrels of oil and up to 500 000 metric tonnes of natural gas into Gulf of Mexico offshore waters over a period of 84 days In ... - Read More

Antibiotic resistance genes are essentially everywhere

The largest metagenomic search for antibiotic resistance genes in the DNA sequences of microbial communities from around the globe has found that bacteria carrying those vexing genes turn up everywhere in nature that scientists look ... - Read More

Undersea warfare: Viruses hijack deep-sea bacteria at hydrothermal vents

More than a mile beneath the ocean's surface as dark clouds of mineral rich water billow from seafloor hot springs called hydrothermal vents unseen armies of viruses and bacteria wage war Like pirates boarding a ... - Read More
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