Invitation to Talk by Dr. James Renwick- Fri 15 Feb
There is a talk next Friday, February the 15th, by Dr James Renwick that may be of interest to MetSoc members.
Titled "The SAM, ozone recovery, and the future of Antarctic sea ice".
cheers Simon (ChCh MetSoc VP)
Time and location
11:00am Friday 15 February, Rutherford (Physics) rm 701, University of Canterbury
Dr. James Renwick Associate Professor of Physical Geography, School of Geography, Victoria University of Wellington
The SAM, ozone recovery, and the future of Antarctic sea ice
Abstract: The Southern Annular Mode (SAM) is a dominant player in Southern Hemisphere atmospheric circulation variability on monthly and longer time scales. This talk will review the mechanism of the SAM, its effect on jet streams and storm tracks, and the role of longer-term trends. The SAM has been trending positive in recent decades (stronger Southern Ocean westerlies) but that looks likely to change as stratospheric ozone recovery takes effect. Implications for the state of the Southern Hemisphere circulation will be discussed. Lastly, the SAM and other features of the Southern Hemisphere atmospheric circulation affect the distribution of Antarctic sea ice. We will review the evidence that ozone recovery and the flattening of the SAM trend will have implications for Antarctic sea ice extent.
Bio: James has over 30 years' experience in weather and climate research. He is currently associate professor of physical geography at Victoria University, specialising in large-scale climate dynamics. He started as a trainee weather forecaster at the Met Service (with a BSc in mathematics from Canterbury) and moved on to seasonal prediction and climate change studies at NIWA, and now at VUW. James is a lead author for the upcoming IPCC 5th Assessment Report, and was also a lead author for the 4th Assessment Report published in 2007. He is chair of the Royal Society of New Zealand Climate Expert Panel, and is immediate Past President of the New Zealand Association of Scientists.
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