Methane, Ozone and Other Trace Gases
Bounding the roles of methane, ozone and trace gases on the Arctic climate with in situ observations
Research Group Ozone
Tropospheric ozone, and particularly its regionally diverse interactions with the Arctic ecosystem, make it another trace gas of interest for IASOA science. For example, surface ozone depletion events were first observed at Alert and Barrow and were linked to atmospheric halogen chemistry (bromine) processes. Recent research indicates that the ozone depletion events are related to increased open ocean area as the Arctic icepack retreats; the resulting open ocean provides a source for the ozone destroying halogens. A side product of thi
Characterization and improved process understanding of Arctic trace gases (particularly methane and ozone) has been identified as an important focal area; a Trace Gases Working Group to address this area is currently being organized. Globally, CO2 and CH4 are responsible for ~82% of increased direct radiative forcing since 1750 by long-lived greenhouse gases. Increased radiative forcing by CO2 has been measured at two Northern Hemisphere sites and found to be consistent with radiative transfer models. Natural emissions of these gases are of
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IASOA does not yet support a working group for this topic. Refer to AMAP expert groups on SLCF's like methane and ozone for more information at this time.