Reference Article

from Wikipedia, the free encyclopedia

Ocean acidification

Ocean acidification is the name given to the ongoing decrease in the pH of the Earth's oceans, caused by their uptake of anthropogenic carbon dioxide from the atmosphere.

Between 1751 and 2004 surface ocean pH is estimated to have decreased from approximately 8.25 to 8.14.

In the natural carbon cycle, the atmospheric concentration of carbon dioxide (CO2) represents a balance of fluxes between the oceans, terrestrial biosphere and the atmosphere.

Human activities such as land-use changes and the combustion of fossil fuels have led to a new flux of CO2 into the atmosphere.

Some of this has remained in the atmosphere (where it is responsible for the rise in atmospheric concentrations), some is believed to have been taken up by terrestrial plants, and some has been absorbed by the oceans.

Although this oceanic absorption will help ameliorate the climatic effects of anthropogenic emissions of CO2, it is believed that it will have negative consequences for oceanic calcifying organisms.

These use the calcite or aragonite polymorphs of calcium carbonate to construct cell coverings or skeletons.

Calcifiers span the food chain from autotrophs to heterotrophs and include organisms such as coccolithophores, corals, foraminifera, echinoderms, crustaceans, and some mollusks, especially pteropods.

Note: This article excerpts material from the Wikipedia article "Ocean acidification", which is released under the GNU Free Documentation License.

See the following related content on ScienceDaily:


Related Videos

last updated on 2014-04-20 at 12:09 am EDT

Ocean Acidification Threatens Global Shellfish Population

Ocean Acidification Threatens Global Shellfish Population

Reuters (Aug. 6, 2012) Global shellfish populations are under increasing pressure brought about by ocean acidification. Scientists from the British Antarctic Survey say that oysters, mussels and crabs are finding it more difficult to develop their shells, making them vulnerable to predators and an overall decline that could impact other parts of the ecosystem.
Powered by NewsLook.com
CO2 Emissions Rapidly Acidifying Oceans

CO2 Emissions Rapidly Acidifying Oceans

Newsy (Nov. 14, 2013) Scientists predict a 170 percent increase in ocean acidity by the end of this century, a change a third of ocean life won't be able to survive.
Powered by NewsLook.com
Greener Energy Exploitation for the Ocean Blue

Greener Energy Exploitation for the Ocean Blue

EFE (Dec. 3, 2012) In the middle of the Pacific off the coast of the US state of Oregon, waves rock an elaborate yellow buoy that is actually a testing system for wave energy technology called Ocean Sentinel. It is part of the relatively new technology that aims to produce sustainable and green electricity using the endless sway of ocean waves.
Powered by NewsLook.com
Arctic Ocean Could Be Open for Shipping in 5-10 Years

Arctic Ocean Could Be Open for Shipping in 5-10 Years

CBC (Apr. 23, 2012) A Canadian scientist claims the Arctic Ocean will be open for regular commercial shipping within the next five to 10 years, but changing ice conditions could bring new hazards to ships.
Powered by NewsLook.com

Related Stories


Share This



Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins