Dispersion in deep polar firn driven by synoptic-scale surface pressure variability

• Published in: The Cryosphere
• Main Authors: C. Buizert, J. P. Severinghaus
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2016
• Subjects: Environmental sciences; GE1-350; Geology; QE1-996.5; Law Dome; The Cryosphere
• Online Access: https://doi.org/10.5194/tc-10-2099-2016; https://doaj.org/article/3bdf094c4fae4b8bac3896c1fd0b7d51

Commonly, three mechanisms of firn air transport are distinguished: molecular diffusion, advection, and near-surface convective mixing. Here we identify and describe a fourth mechanism, namely dispersion driven by synoptic-scale surface pressure variability (or barometric pumping). We use published...