Sentences with phrase «polar ice samples»

To get a view on global temperatures that long ago, the researchers studied 73 sediment and polar ice samples, taken from all over the globe.

Not exact matches

Following an expected soft landing in the northern polar region, Phoenix will study the planet's ice cap and use a robotic arm to dig into the Martian subsurface, collecting ice and soil samples.

Keeling's record of data from Mauna Loa is considered one of the best and most consistent climate records anywhere, though scientists also use other sources for atmospheric data, including samples of air trapped in polar ice, to analyze CO2 levels in past millennia.

By far the best match was to the record of atmospheric carbon dioxide, measured from atmospheric samples and air trapped in polar ice.

The following are more of interest: — «Winter Sampling of Shallow Firn Air at the South Pole to Understand Processes Affecting Firn Atmospheric Histories and Ice Core Gas Records» by Severinghaus (2000), — «Thermal fractionation of air in polar firn by seasonal temperature gradients» by Severinghaus, Grachev & Battle (2001), — «Severinghaus et al. «Fractionation of gases in polar ice during bubble close - off: New constraints from firn air Ne, Kr and Xe observations» by Severinghaus & Battle (2006), but all follow the same line of reasoniIce Core Gas Records» by Severinghaus (2000), — «Thermal fractionation of air in polar firn by seasonal temperature gradients» by Severinghaus, Grachev & Battle (2001), — «Severinghaus et al. «Fractionation of gases in polar ice during bubble close - off: New constraints from firn air Ne, Kr and Xe observations» by Severinghaus & Battle (2006), but all follow the same line of reasoniice during bubble close - off: New constraints from firn air Ne, Kr and Xe observations» by Severinghaus & Battle (2006), but all follow the same line of reasoning.

Uncertainties should decrease closer to near - current dates (e.g. from denser and more accurate sampling)-- but note that these products also employ different QC and analysis methods, rely to varying degrees on satellite data, on sea - ice data to constrain polar SST, and on bias adjustments for historical changes in measurement methods.

The gradual but systematic rise of 1.5 degrees C is best explained by the record of atmospheric carbon dioxide, measured from atmospheric samples and air trapped in polar ice.

A geologist can take soil samples, sample cores taken from a tropical ocean or sample cores from beneath the polar ice caps.