University of Tasmania, Australia

The sixth in the Bayesian Seminar series compared fitting generalized linear mixed models by classical likehlihood and Bayesian techniques.  The scripts for the examples are here

mixed

This fifth seminar in the Bayesian Seminar series introduced the Metropolis Hastings algorithm.  The first chapter of first chapter of Markov Chain Monte Carlo in Practice discusses the basic theory.  The script and data for the example are here

Metropolis

The fourth in the Bayesian Seminar series examined linear regression in a Bayesian context.  The script is here

SimpleLinearRegression

The third in the Bayesian Seminar series developed basic skills with WinBUGs.  WinBUGs can be freely downloaded from the WinBUGs site. The scripts used discussed in the seminar can be found here

Scripts

The second seminar in the series focused on a variety of simple problems.  The notes can be found here:

Bayes

This week’s seminar introduced the basic principles of Bayesian inference, and the slides can be found here – BayesSeminar1

Tom Trull – IMAS

Date:  Friday, 15 June 2012, 4:00 PM
Venue:  IMAS Seminar room Continue reading →

Emmanuel Laurenceau – PhD confirmation seminar

Date:  Friday, 15 June 2012, 3:30 PM
Venue:  IMAS seminar room Continue reading →

Nick Roden – PhD confirmation seminar
Venue:  IMAS seminar room
Date:  8 June 2012  3:00 PM

Abstract: 
The carbon cycle and the transport of carbon dioxide (CO₂) from the atmosphere to the ocean is an important issue in climate research.  Globally, the role of the coastal ocean in the carbon cycle is poorly constrained, particularly in seasonally ice-covered regions.  This is due largely, to a lack of field measurements.  The uptake by the ocean of anthropogenic CO₂ from the atmosphere lowers the pH and the dissolved carbonate ion concentration of seawater, causing ocean acidification.  The Antarctic shelf supports a disproportionately large fraction of Southern Ocean productivity, and is vulnerable to anthropogenic acidification.  A full annual cycle of inorganic carbon system observations, collected over a ten-month period in 2010 and 2011, at a coastal site in Prydz Bay (East Antarctica) is presented.  Observations indicate that seasonal changes in the carbonate system are dominated by sea-ice melt/formation, net community production and air-sea CO₂ exchange.  Additionally these data are compared to a second set of annual observations at the same site, made 16 years earlier.  For the first time, these observations allow an assessment of decadal changes in carbonate chemistry, and acidification, in the Antarctic seasonal sea ice zone.

Molly Zhongnan Jia – PhD confirmation seminar
Venue:  IMAS seminar room
Date:  8 June 2012 3:30 PM

Abstract:
Survival of early stages of Antarctic krill is very important for recruitment of the species. Larval krill are more sensitive than adults to environmental changes, and require adequate food for survival in the winter. Earlier studies indicate that krill larvae might rely on the sea ice algae as their main dietary resource, and they might also use the sea ice as a refuge from strong hydrographical movements and predators. My study will use three methods (microscopy, stable isotope analysis, and genetic analysis) to examine the diet of larval krill in late winter. By combining this dietary information with detailed metabolic measurements, I will be able to produce an energetic model for growth of krill larvae in the sea ice zone in that area. Also, this information will enable the evaluation of the significance of sea ice in the life cycle of krill.