1) Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093, USA, 2) The Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel, 3) IPSL Laboratoire des Sciences du Climat et de l’Environnement, UMR CEA-CNRS 1572, CEA Saclay, 91191 Gif-sur-Yvette, France
Geochimica et Cosmochimica Acta (2003), V67 (3), pp. 325–343, doi: 10.1016/S0016-7037(02)00965-1
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 Dome, Antarctica
Jeffrey P. Severinghaus1 (1), Alexi Grachev (1), Boaz Luz (2) and Nicolas Caillon (3)
We describe a method for measuring the 40Ar/36Ar ratio and the 84Kr/36Ar ratio in air from bubbles trapped in ice cores. These ratios can provide constraints on the past thickness of the firn layer at the ice core site and on the magnitude of past rapid temperature variations when combined with measured 15N/14N. Both variables contribute to paleoclimatic studies and ultimately to the understanding of the controls on Earth’s climate.
- IRMS
- MAT 252
- Dual Inlet
- Ar isotopes
- Ice
United States
