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Related Concept Videos

Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
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Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses
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Tracking the variable North Atlantic sink for atmospheric CO2.

Andrew J Watson1, Ute Schuster, Dorothee C E Bakker

  • 1School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK. a.watson@uea.ac.uk

Science (New York, N.Y.)
|December 8, 2009
PubMed
Summary

The North Atlantic Ocean shows significant year-to-year changes in carbon dioxide (CO2) uptake. Instrumented ships precisely measured the CO2 flux in 2005, enabling better ocean carbon sink monitoring.

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Published on: November 21, 2015

Area of Science:

  • Oceanography
  • Climate Science
  • Biogeochemistry

Background:

  • Oceans act as a major sink for atmospheric carbon dioxide (CO2).
  • Accurate tracking of oceanic CO2 uptake rates across ocean basins has been limited by sparse historical observations.
  • Understanding variations in ocean CO2 uptake is crucial for climate change modeling.

Purpose of the Study:

  • To investigate the variability of carbon dioxide (CO2) uptake in the North Atlantic Ocean on interannual timescales.
  • To quantify the annual CO2 flux into the North Atlantic for the year 2005 with high precision.
  • To assess the potential of using instrumented commercial ships for monitoring oceanic CO2 sinks.

Main Methods:

  • Utilized observations to demonstrate substantial variability in North Atlantic CO2 uptake.
  • Employed measurements from a coordinated network of instrumented commercial ships.
  • Defined the annual CO2 flux into the North Atlantic for 2005 with approximately 10% precision.

Main Results:

  • Substantial variability in the North Atlantic's carbon dioxide (CO2) uptake was observed on time scales of a few years.
  • The annual CO2 flux into the North Atlantic for 2005 was determined with a precision of about 10%.
  • The study highlights the effectiveness of ship-based measurements for quantifying oceanic CO2 uptake.

Conclusions:

  • The North Atlantic Ocean exhibits significant interannual variability in its capacity to absorb atmospheric carbon dioxide (CO2).
  • A coordinated network of instrumented commercial ships provides a viable method for accurately monitoring oceanic CO2 sinks.
  • This approach holds promise for enhanced tracking of changing ocean carbon sinks in well-trafficked ocean basins.