Sentences with phrase «chemical tracers»
"Chemical tracers" are substances or compounds that are used to track or identify certain processes or movements in a system or environment. They can help scientists understand how things spread or behave by allowing them to observe and analyze the movement of these tracers. Full definition
The paper includes a long - awaited analysis of chemical tracers in ice cylinders the team recovered by drilling deep into Quelccaya, a record that will aid scientists worldwide in reconstructing past climatic variations.
chimalaya.org
This isn't perfect, to be sure, but it is constrained by things like ocean chemical tracer analyses.
Visible from North Carolina to upstate New York, the eerie trails were created by five suborbital NASA rockets that soared to altitudes of 50 to 80 miles, where they released chemical tracers that reacted with oxygen in the thin upper atmosphere.
And yet chemical tracers in the remains suggest that most of the Tollense warriors came from hundreds of kilometers away.
Using spray cans, he spritzes the rock with a mist of brightchartreuse latex spheres, each the size of a bacterium, and then withan orange - colored chemical tracer.
The cruise was part of the international GEOTRACES program, which aims to measure chemical tracers in the world's ocean to understand ocean circulation and provide a baseline to assess future chemical changes in the oceans.
«Seeing more with PET scans: New chemistry for medical imaging: Surprising new mechanism for attaching chemical tracers discovered.»
Using chemical tracers in sediment that builds up on the sea floor over time, Henry and his co-authors were able to document the relative speed of the Atlantic meridional overturning circulation during each abrupt climate change.
To determine how ocean circulation changed, the scientists measured three types of chemical tracers.
Unlike the current fluid tracing methods sometimes utilized by the oil and gas industry (radioactive isotope tracers and chemical tracers), this technology uses specially designed nanoparticles that exhibit a unique profile, or «signature,» that can be detected at low concentrations.
Water mass - A volume of ocean water with identifiable properties (temperature, salinity, density, chemical tracers) resulting from its unique formation process.
The chemical tracers also show that circulation slowed almost to a halt during certain stadials known as Heinrich events, when massive amounts of icebergs broke off and drifted away from the Laurentide ice sheet, which covered a large part of North America at the time.
The chemical tracers show that the speed of the ocean overturning circulation changed first and that a change in sea surface temperature followed.
Using isotopic and chemical tracers, the researchers estimate that the CO2 had been mineralized into benign and stable carbonate minerals in the space of just two years.
Advection - Transport of water or air along with its properties (e.g., temperature, chemical tracers) by the motion of the fluid.