Natural and anthropogenic changes in atmospheric greenhouse gases over the past 2 millennia

• Main Authors: Etheridge, DM, Rubino, M, Trudinger, CM, Allison, CE, Steele, LP, Thornton, D, Vollmer, M, Krummel, PB, Smith, AM, Curran, MAJ, Sturgess, WT
• Format: Conference Object
• Language: English
• Published: Strategic Science in Antarctica 2013 Conference, At University of Tasmania, Hobart. 2015
• Subjects: Gases; Ice; Air; Isotopes; Chlorofluourocarbons; Nitrous oxide; Law Dome; Antarc*; Antarctica; ice core
• Online Access: http://apo.ansto.gov.au/dspace/handle/10238/6420; http://conference.antarctica.gov.au/program/conference/day-3-ice-sheet-and-the-paleoclimate

Millennial changes in atmospheric trace gas composition are best determined from air enclosed in ice sheets. Air extracted from the open pores in firn and the bubbles in ice is measured to derive the past concentrations and isotopic ratios of the long lived trace gases. The significant increases obs...