Methyl Chloride, Methyl Bromide, and Carbonyl Sulfide in Deep Antarctic Ice CoresEntry ID: saltzman_0636953
Abstract: This award supports a project to measure methyl chloride, methyl bromide, and carbonyl sulfide in air extracted from Antarctic ice cores.
Purpose: Previous measurements in firn air and shallow ice cores suggest that the ice archive contains paleo-atmospheric signals for these gases. The goal of this study is to extend these records throughout the Holocene and into the last Glacial period to examine the behavior of these trace gases over longer time scales and a wider range of climatic conditions. These studies are exploratory, and both the ... stability of these trace gases and the extent to which they may be impacted by in situ processes will be assessed. This project will involve sampling and analyzing archived ice core samples from the South Pole, Siple Dome, Taylor Dome, Byrd, and Vostok ice cores. The ice core samples will be analyzed by dry extraction, with gas chromatography/mass spectrometry with isotope dilution. The ice core measurements will generate new information about the range of natural variability of these trace gases in the atmosphere.
(Click for Interactive Map)
Start Date: 1947-01-01
Quality The major part of the coastline of the Australian Antarctic Territory was photograped in 1947 by the US Navy. The photos are stored as 9 inch B/W prints at the AAD. Selected photos have been scanned at 600 pixels/inch, 256 gray tones, and converted to JPEG files. These have then been written to single session CD roms of 650 MByte capacity. Consistent Position data for each scanned photo has been calculated by linear interpolation along the flight line. There may be large errors in the positions of some of the photos. Each image is approximately 15 MB in size.
Access Constraints Contact the investigator for access to the cd's or the photos.
Use Constraints This data set conforms to the PICCCBY Attribution License
Must be cited properly
Data Set Progress
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 3 6232 3528
Fax: +61 3 6232 3351
Email: mapping at aad.gov.au
Australian Antarctic Division 203 Channel Highway
Province or State: Tasmania
Postal Code: 7050
Creation and Review Dates
DIF Creation Date: 1999-10-07
Last DIF Revision Date: 2008-04-21