Sentences with phrase «polar ice cores»

A contributor to the famous «hockey stick graph», he specialises in mining historic climate data from polar ice cores.

Past changes in atmospheric greenhouse gas concentrations can be determined with very high confidence from polar ice cores.

The U.S. first started drilling deep polar ice cores in Greenland in 1956, with more drilling at Antarctica's Byrd Station a few years later.

Assumptions are required to estimate global surface temperature change from deep ocean changes, but we argue and present evidence that the ocean core record yields a better measure of global mean change than that provided by polar ice cores.

Dust trapped in polar ice cores shows that ejected material spread around the globe, indicating that the eruption injected substantial material into the stratosphere, where it can strongly affect climate.

The degree of mixing is disputed for 10Be but there is good evidence that 10Be gets also well mixed and that, e.g., the signal measured in polar ice cores reflects mainly the global average production signal (see, e.g., Muscheler & Heikkilä 2011, and references therein).

Preindustrial atmospheric ethane levels inferred from polar ice cores: a constraint on the geologic sources of atmospheric ethane and methane, Geophysical Research Letters, 43 (1), p. 214 - 221.

But when Lavigne's team examined shards of volcanic glass from this volcano, they found that they didn't match the chemical composition of the glass found in polar ice cores, whereas the Samalas glass is a much closer match.

That a powerful volcano erupted somewhere in the world, sometime in the Middle Ages, is written in polar ice cores in the form of layers of sulfate deposits and tiny shards of volcanic glass.

However, the researchers suggest, changes ranging from growing levels of carbon dioxide in the atmosphere to infusions of plastics into marine sediments suggest that we've now left the Holocene decisively behind — and that the proof is already being laid down in polar ice cores, deep ocean sediments, and future rocks themselves.

Carbonyl sulfide hydrolysis in polar ice cores and the feasibility of recovering a paleoatmospheric history.

If there were, it would be far easier to establish volcanic eruption chronologies, i.e. we wouldn't have to go to polar ice cores.

Climate forcings due to past changes in GHGs and surface albedo can be computed for the past 800000 years using data from polar ice cores and ocean sediment cores.

The variations of solar activity over long time intervals using a solar activity reconstruction based on the cosmogenic radionuclide 10Be measured in polar ice cores are studied.

In the past decade, scientists have documented similar dust peaks in polar ice cores, and in sediments from the Atlantic and Indian oceans, but records from Pacific were contradictory.