Correction Of Air-content Measurements In Polar Ice For The Effect Of Cut Bubbles At The Surface Of The Sample

• Published in: Journal of Glaciology
• Main Authors: Martinerie, P., Lipenkov, V.Ya., Raynaud, D.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1990
• Subjects: Journal of Glaciology
• Online Access: http://dx.doi.org/10.1017/002214390793701282; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000004329

Abstract Air content ( V ) of polar ice has been used as an indicator of the past elevation of the ice sheets. A calculation is presented to correct V measurements performed on ice samples for the effect of cut bubbles at their surface. The results indicate a correction ranging from 1 to 10% for cubic ice samples with about 3 cm length. The correction depends mainly on the size of the bubbles. The theoretical calculation is experimentally verified. The statistical noise linked with the presence of a finite number of bubbles in the ice samples is evaluated. The influence of such a correction on the V profiles measured on polar ice cores is discussed. The method in this paper can also be used for correction of ice-density data obtained by the hydrostatic method.