Reference Library: CaCO3 saturation state

Chemical and biological impacts of ocean acidification along the west coast of North America

  • Posted on: Fri, 12/16/2016 - 10:17
  • By: jackie

The continental shelf region off the west coast of North America is seasonally exposed to water with a low aragonite saturation state by coastal upwelling of CO2-rich waters. To date, the spatial and temporal distribution of anthropogenic CO2 (Canth) within the CO2-rich waters is largely unknown. Here we adapt the multiple ...

Water quality criteria for an acidifying ocean: Challenges and opportunities for improvement

  • Posted on: Tue, 11/01/2016 - 11:50
  • By: jackie

Acidification has sparked discussion about whether regulatory agencies should place coastal waters on the Clean Water Act 303(d) impaired water bodies list. Here we describe scientific challenges in assessing impairment with existing data, exploring use of both pH and biological criteria. Application of pH criteria is challenging because present coastal ...

The Pacific oyster, Crassostrea gigas, shows negative correlation to naturally elevated carbon dioxide levels: Implications for near-term ocean acidification effects

  • Posted on: Wed, 06/15/2016 - 21:10
  • By: petert

At an oyster hatchery on the Oregon coast, researchers found that production of oyster larvae and growth of young oysters dropped when the aragonite saturation state decreased in seawater. (Laboratory study)

Understanding ocean acidification impacts on organismal to ecological scales

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

Ocean acidification (OA) research seeks to understand how marine ecosystems and global elemental cycles will respond to changes in seawater carbonate chemistry in combination with other environmental perturbations such as warming, eutrophication, and deoxygenation. This paper discusses the effectiveness and limitations of current research approaches used to address this goal. ...

Climatological Distributions of pH, pCO2, Total CO2, Alkalinity, and CaCO3 Saturation in the Global Surface Ocean

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

This report describes climatological mean monthly distributions of pH, total carbon dioxide concentration, and the degree of CaCO3 saturation for the global surface ocean waters (excluding coastal areas) to depths of approximately 160 feet (50 meters).

Extensive dissolution of live pteropods in the Southern Ocean

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

When scientists collected pteropods living in the Southern Ocean, where high levels of CO2 caused low availability of calcium carbonate in the water for building shells, they found that the pteropods' shells had severely dissolved. In the laboratory, pteropods incubated under similar CO2 conditions had equivalent levels of dissolution. ...

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