A method for precise measurement of argon 40/36 and krypton/argon ratios in trapped air in polar ice with applications to past firn thickness and abrupt climate change in Greenland and at Siple…

By J. Severinghaus, A. Grachev, B. Luz, N. Caillon. 2003

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Fractionation of gases in polar ice during bubble close-off: New constraints from firn air Ne, Kr and Xe observations (2006, methodology): “fractionation is primarily size-dependent, as inferred by Battle et al. [2], Severinghaus et al. [ 11 ] and Huber et al. [44].”
Thermohaline Ocean Circulation (2006, background): “In 1908 Johan Sandstrom performed a series of classic tank experiments at Borno oceanographic station in Sweden to investigate both possibilities [ Sandstrom, 1908 ], describing the properties of “wind-driven circulation” and “thermal circulation”.”
A redetermination of the isotopic abundances of atmospheric Ar (2006, unknown): “The delta values are slightly sensitive to imbalance between the standard and sample gas pressures in the ion source, thus the data were corrected for this effect (typically less than 0.005&) ( Severinghaus et al., 2003 ).”