Posted by Liz Adams on Jan 21, 2016 in Abstracts, Abstracts 2015
The Antarctic Ozone Hole during 2013 Abstract We review the 2013 Antarctic ozone hole, making use of various meteorological reanalyses, remotely sensed ozone measurements and ground-based measurements of ultra-violet radiation. Based on analysis of 34 years of satellite records, we find that, in terms of maximum area, minimum ozone level and total ozone deficit, the ozone hole in 2013 was typical of other years of moderate ozone loss. The estimated integrated ozone mass...
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Posted by Liz Adams on Jan 21, 2016 in Abstracts, Abstracts 2015
Theoretical comparison of subgrid turbulence in the atmosphere and ocean Abstract Due to the massive disparity between the largest and smallest eddies in the atmosphere and ocean, it is not possible to simulate these flows by explicitly resolving all scales on a computational grid. Instead the large scales are explicitly resolved, and the interactions between the unresolved subgrid turbulence and large resolved scales are parameterised. If these interactions are not...
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Posted by Liz Adams on Jan 21, 2016 in Abstracts, Abstracts 2015
The subtropical ridge in CMIP5 models, and implications for projections of rainfall in southeast Australia Abstract The subtropical ridge (STR) is the mean pressure ridge in the mid-latitudes, and is one of the key features affecting climate variability and change in southeast Australia. Changes to the STR and associated changes to rainfall in a warming climate are of strong interest, and the new Coupled Model Inter-comparison Project phase 5 (CMIP5) model archive provides...
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Posted by Liz Adams on Jan 21, 2016 in Abstracts, Abstracts 2015
Comparison of various climate change projections of eastern Australian rainfall Abstract The Australian eastern seaboard is a distinct climate entity from the interior of the continent, with different climatic influences on each side of the Great Dividing Range. Therefore, it is plausible that downscaling of global climate models could reveal meaningful regional detail, or ‘added value’, in the climate change signal of mean rainfall change in eastern Australia under future...
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Posted by Liz Adams on Jan 20, 2016 in Abstracts, Abstracts 2015
Antarctic Sea Ice Response in CMIP5 Pre-industrial, Historical and Ozone Perturbation Simulations Abstract Multi-decadal Antarctic sea-ice trends from three CMIP5 modelling systems (ACCESS1.0, ACCESS1.3 and CSIRO Mk3.6) are compared against recent observations. Several hypotheses are advanced to explain the recent small positive trend in overall extent. Area weighted trends in some ensemble members of the CSIRO Mk3.6 system match the observations reasonably well. Whilst...
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