Quantcast
Last updated on April 16, 2014 at 14:14 EDT

Latest Chemical oceanography Stories

2008-08-17 12:00:19

By BINA VENKATARAMAN By Bina Venkataraman The New York Times Many coastal areas of the world's oceans are being starved of oxygen at an alarming rate, with vast stretches along the seafloor depleted of it to the point where they can barely sustain marine life, researchers are reporting. The main culprit, scientists say, is nitrogen-rich nutrients from crop fertilizers that spill into coastal waters by way of rivers and streams. A study to be published today in the journal Science...

2008-08-14 16:41:06

Parts of the world's oceans are running low on oxygen, a new study finds. Fertilizers and other chemical pollutants in river runoff fuel blooms of algae that cause oxygen levels to dip precipitously when they die. A review of research into these so-called "dead zones," detailed in the Aug. 15 issue of the journal Science, finds that the number of dead zones has roughly doubled every decade since the 1960's. The study authors, Robert Diaz of the Virginia Institute of Marine Science and...

e81d0f3d5dad6fa67134d35d230c41a41
2008-08-16 04:50:00

A recent study suggests that rising acidification of the ocean could reduce fertilization of marine invertebrates and might eventually wipe out colonies of sea urchins, lobsters, mussels and oysters. Ocean acidification was known to be eating away at the shells of marine animals, but the new study has found that rising acidity hindered marine sperm from swimming to and fertilizing eggs in the ocean. The report by Australian and Swedish scientists said climate change and the subsequent...

c4bdb1b5f6e44c1cfe903db502cc20571
2008-08-15 10:47:01

Areas of the world's oceans known as "dead zones" because they lack proper oxygen levels to sustain most marine life, continue to grow worldwide at an unprecedented rate, scientists reported on Thursday. Scientists point to runoff of nitrogen and phosphorous-containing agricultural fertilizers as the primary cause of the recent expansion. Nitrogen compounds from burning fossils fuels, particularly from power plants and cars, also are settling back to the ground and eventually wash into...

2008-08-09 03:00:24

By Lapointe, Mathieu MacKenzie, Tyler D B; Morse, David The oceans globally constitute an important sink for carbon dioxide (CO2) due to phytoplankton photosynthesis. However, the marine environment imposes serious restraints to carbon fixation. First, the equilibrium between CO2 and bicarbonate (HCO^sub 3^-) is pH dependent, and, in normal, slightly alkaline seawater, [CO2] is typically low (approximately 10 mM ). Second, the rate of CO2 diffusion in seawater is slow, so, for any cells...

2008-08-06 18:00:16

By PAMELA WOOD Staff Writer There are two dreaded words that pretty much sum up all thats wrong with the Chesapeake Bay: dead zone. Though scientists say the term is something of a misnomer, it conjures a relatively accurate picture of whats going on below the surface of the bay. The dead zone is a vast stretch of oxygen-deprived water that cant support fish, crabs, shellfish or even little worms. The root cause of the dead zone is nitrogen and phosphorus pollution that comes washing off...

2008-08-04 18:00:26

By PAMELA WOOD Staff Writer There are two dreaded words that pretty much sum up all that's wrong with the Chesapeake Bay: dead zone. Though scientists say the term is something of a misnomer, it conjures a relatively accurate picture of what's going on below the surface of the bay. The dead zone is a vast stretch of oxygen-deprived water that can't support fish, crabs, shellfish or even little worms. The root cause of the dead zone is nitrogen and phosphorus pollution that comes...

2008-08-01 00:06:08

By The Associated Press DES MOINES (AP) - Environmental groups in nine states petitioned the federal government on Wednesday to set and enforce pollution standards in the Mississippi River basin and the Gulf of Mexico.The petition to the U.S. Environmental Protection Agency followed Monday's announcement that the dead zone in the Gulf of Mexico is the second-largest to date at 8,000 square miles.The dead zone is an area of water where oxygen levels are too low to support marine life. It's...

2008-07-24 18:00:35

Reefs may erode in areas with high carbon dioxide levels because the glue binding coral skeletons to larger reef structures is missing, a U.S. study says. The study found coral reefs in the eastern tropical Pacific Ocean offer a real-world example of the reef ecosystems will face under high carbon dioxide conditions resulting in ocean acidification, the National Oceanic and Atmospheric Administration said Thursday in a release. Derek Manzello, a coral reef ecologist at NOAA's Atlantic...

03510a3584a1db660fb86310383629ec1
2008-07-24 09:05:00

By Marla Dickerson / Los Angeles Times A few miles inland from the Pacific Ocean, amid cracked earth and mesquite and sun-bleached cactus, neat rows of emerald plants sprout from the desert floor. The crop is salicornia. It is nourished by seawater flowing from a man-made canal. And if you believe the American who is farming it, this incongruous swath of green has the potential to feed the world, fuel our vehicles and slow global warming. He is Carl Hodges, a Tucson, Ariz.-based...


Latest Chemical oceanography Reference Libraries

Ocean Acidification
2013-04-01 10:32:20

Ocean acidification is the name that was given to the ongoing decrease in the pH of Earth’s oceans, a cause of the uptake of anthropogenic carbon dioxide from the atmosphere. About 30 to 40 percent of the carbon dioxide that is released by humans into the atmosphere dissolves into the lakes, oceans, and rivers. To maintain the chemical equilibrium, some of it reacts with the water to create carbonic acid. Some of these extra carbonic acid molecules react with a water molecule to provide a...

More Articles (1 articles) »