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Latest Chemical oceanography Stories

Great Bahama Bank marine core sediments
2014-09-18 02:30:49

University of Miami Rosenstiel School of Marine and Atmospheric Science Scientists analyze marine sediment core to understand trends in carbon isotopes over time A recent study of the global carbon cycle offers a new perspective of Earth’s climate records through time. Scientists at the University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science suggest that one of the current methods for interpreting ancient changes in the concentration of carbon dioxide in the...

Sharks In Acidic Waters Could Lose Ability To Smell Food
2014-09-12 03:05:34

By Brett Israel, Georgia Institute of Technology 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 odor-tracking behavior of the smooth dogfish, a shark whose range includes the Atlantic Ocean off the eastern United States. Adult sharks significantly avoided squid odor after swimming in a pool of water treated...

greenhouse gas bulletin
2014-09-09 07:28:44

Chuck Bednar for redOrbit.com - Your Universe Online Propelled by the largest single-year increase in carbon dioxide in three decades, the amount of greenhouse gases in the atmosphere reached record highs in 2013, the World Meteorological Organization (WMO) reported on Tuesday. According to the agency’s annual Greenhouse Gas Bulletin, there was a 34 percent increase in radiative forcing (the warming effect on our climate) due to CO2, methane and nitrous oxide. The report found that...

low-oxygen zone
2014-08-11 03:00:40

Hannah Hickey, University of Washington As the complex story of climate change unfolds, many of the endings are grim. But there are exceptions. Predictions that the lowest-oxygen environments in the ocean would get worse may not come to pass. Instead, University of Washington research shows climate change, as it weakens the trade winds, could shrink the size of these extreme low-oxygen waters. "The tropics should actually get better oxygenated as the climate warms up," said Curtis...

Burrowing Animals May Have Been Key To Stabilizing Earth's Oxygen Reservoir
2014-08-08 03:22:57

University of Southern Denmark Evolution of the first burrowing animals may have played a major role in stabilizing the Earth's oxygen reservoir, according to a new study in Nature Geoscience. Around 540 million years ago, the first burrowing animals evolved. When these worms began to mix up the ocean floor's sediments (a process known as bioturbation), their activity came to significantly influence the ocean's phosphorus cycle and as a result, the amount of oxygen in Earth's...

Gulf of Mexico dead zone
2014-08-06 02:00:11

NOAA Headquarters Mapped size confirms NOAA forecast for an average-sized hypoxia zone this year NOAA- and EPA-supported scientists have mapped the Gulf of Mexico dead zone, an area with low oxygen water, measuring 5,052 square miles this summer  — approximately the size of Connecticut. The measurements were taken during the 30th annual hypoxia survey cruise from July 27 to August 2. This area falls within the predicted range of 4,633 to 5,708 square miles forecast by a suite of...

2014-07-17 12:22:22

WASHINGTON, July 17, 2014 /PRNewswire-USNewswire/ -- NASA embarks this week on a coordinated ship and aircraft observation campaign off the Atlantic coast of the United States, an effort to advance space-based capabilities for monitoring microscopic plants that form the base of the marine food chain. http://photos.prnewswire.com/prnvar/20081007/38461LOGO Phytoplankton, tiny ocean plants that absorb carbon dioxide and deliver oxygen to Earth's atmosphere, play a major role in the...

Modern Ocean Acidification Is Outpacing Ancient Upheaval
2014-06-03 15:48:09

Columbia University Rate May Be Ten Times Faster, According to New Data 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 that ocean acidification caused the crisis—similar to today, as manmade CO2 combines with seawater to change its chemistry. Now, for the first time, scientists have...

coastal dead zone
2014-05-19 12:44:34

Brett Smith for redOrbit.com - Your Universe Online Containing dissolved oxygen concentrations of less than 2 or 3 parts per million, hypoxic waters in estuaries and sections of coastline are essentially “dead zones” where life cannot exist. According to a new study in the journal Nature Geoscience, iron discharged from continental sediments acts as a limiting switch that could prevent coastal waters from creating a runaway feedback loop that leads to less and less dissolved oxygen...

Ocean Acidity Is Dissolving Shells Of Tiny Snails Off The US West Coast
2014-05-01 03:41:37

NOAA A NOAA-led research team has found the first evidence that acidity of continental shelf waters off the West Coast is dissolving the shells of tiny free-swimming marine snails, called pteropods, which provide food for pink salmon, mackerel and herring, according to a new paper published in Proceedings of the Royal Society B. Researchers estimate that the percentage of pteropods in this region with dissolving shells due to ocean acidification has doubled in the nearshore habitat...


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...

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Word of the Day
barghest
  • A goblin in English folklore, often appearing in the shape of a large dog and believed to portend imminent death or misfortune.
  • A ghost, wraith, hobgoblin, elf, or spirit.
The origin of 'barghest' is not known, but it may be from perhaps burh-ghest, town-ghost, or German Berg-geist (mountain spirit) or Bär-geist (bear-spirit).
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