But in going from interglacial to glacial conditions, changes in air temperature always occur first, followed by changes in atmospheric carbon dioxide.
Ice cores from Antarctica contain a record of the atmosphere stretching back more than four glacial cycles — minute samples of air get trapped in tiny bubbles — and researchers who have studied these cores have concluded that fully half the temperature difference between cold periods and warm ones can be attributed to changes in the concentrations of greenhouse gases.
Petrenko, V., Andrew M. Smith, Gordon W. Brailsford, Katja Riedel, Quan Hua, David C. Lowe, J. P. Severinghaus, Vladimir Levchenko, Tony Bromley, Rowena Moss et al. "A New Method for Analyzing 14C of Methane in Ancient Air Extracted from Glacial Ice". Radiocarbon 50, no. 1 (2008): 53-73.
A geochemical exploration campaign aims at locating economic mineral deposits through recognition of unusual concentrations of chemical components, to be called as geochemical anomaly, in surficial materials such as rocks, soils, stream sediments, glacial till, water, plants, and air.
A glacial bassline casts an algid air over the track, the Berlin-based artist's words barely intelligible through a fog of reverb (though they're helpfully subtitled in the track's video).
Cells on the lower surface of the filter were fixed for 30 min in methanol and glacial acetic acid mixture (3:1), air-dried briefly, and stained with Giemsa.
Sue MacGregor is one of the women who came up through the ranks when any moves towards female voices on air happened at a glacial pace.
Like anyone who sets foot in stores and appreciates the inherent strangeness of retail, I admire a spiteful salesclerk: the air of resentment, the glacial response time, the high beauty-to-knowledge ratio.
After four cycles of this procedure, the film was cooled down to room temperature and then dipped in glacial acetic acid and dried under air twice more without additional oven drying.
Potential activity time is more severely affected because our modeling assumes that the air temperature changes between glacial cycles but solar radiation does not.
Total lipid extracts were treated with an equal volume of NaOH (0.2 M in CH3OH, 45 min at 37°C), neutralized with glacial acetic acid, and dried in air.
