Atmospheric Variability Of Methyl Chloride During the Last 300 Years From an Antarctic Ice Core and Firn Air

Measurements of methyl chloride (CH3Cl) in Antarctic polar ice and firn air are used to describe the variability of atmospheric CH3Cl during the past 300 years. Firn air results from South Pole and Siple Dome suggest that the atmospheric abundance of CH3Cl increased by about 10% in the 50 years prio...

Full description

Bibliographic Details
Main Authors: Aydin, M., Saltzman, Eric S., De Bruyn, Warren J., Montzka, S. A., Butler, J. H., Battle, M.
Format: Text
Language:unknown
Published: Chapman University Digital Commons 2004
Subjects:
Emissions
Inventory
Reactive Chlorine
Global Emissions
North-Atlantic Halocarbons
Centuries
Greenland
Recored
Gases
Atmospheric Sciences
Environmental Chemistry
Glaciology
Other Oceanography and Atmospheric Sciences and Meteorology
Antarctic
South Pole
Siple
Siple Dome
Antarc*
ice core
North Atlantic
South pole
Online Access:https://digitalcommons.chapman.edu/sees_articles/80
https://digitalcommons.chapman.edu/cgi/viewcontent.cgi?article=1071&context=sees_articles
Description
Summary:Measurements of methyl chloride (CH3Cl) in Antarctic polar ice and firn air are used to describe the variability of atmospheric CH3Cl during the past 300 years. Firn air results from South Pole and Siple Dome suggest that the atmospheric abundance of CH3Cl increased by about 10% in the 50 years prior to 1990. Ice core measurements from Siple Dome provide evidence for a cyclic natural variability on the order of 10%, with a period of about 110 years in phase with the 20th century rise inferred from firn air. Thus, the CH3Cl increase measured in firn air may largely be a result of natural processes, which may continue to affect the atmospheric CH3Cl burden during the 21st century.

Similar Items