THE last really sensational global warming story broadcast by the Australian Broadcasting Corporation (ABC) has been withdrawn – but not by the ABC. There has been not a word on the new development from the ABC or any of the other media outlets that originally reported on it.
The story made headlines around the world following a media release from the University of Melbourne and the endorsement of David Karoly:
‘The last 50 years in Australia have been the warmest.
The researchers from Melbourne University used 27 different natural indicators like tree rings and ice cores to come to their conclusion, which will be a part of the next United Nations intergovernmental panel on climate change report.
The findings show that no other period in the last 1,000 years matches the temperature rises Australia and the region has experienced in the last 50 years.’
Sounds like another hockey stick doesn’t it? Following scrutiny at Steve McIntyre’s blog ‘Climate Audit’ the paper how been withdrawn. Dr Karoly advised Mr McIntyre thus:
I am contacting you on behalf of all the authors of the Gergis et al (2012) study ‘Evidence of unusual late 20th century warming from an Australasian temperature reconstruction spanning the last millennium’
An issue has been identified in the processing of the data used in the study, which may affect the results. While the paper states that “both proxy climate and instrumental data were linearly detrended over the 1921–1990 period”, we discovered on Tuesday 5 June that the records used in the final analysis were not detrended for proxy selection, making this statement incorrect. Although this is an unfortunate data processing issue, it is likely to have implications for the results reported in the study.
The journal has been contacted and the publication of the study has been put on hold.
This is a normal part of science. The testing of scientific studies through independent analysis of data and methods strengthens the conclusions. In this study, an issue has been identified and the results are being re-checked.
We would be grateful if you would post the notice below on your ClimateAudit web site.
We would like to thank you and the participants at the ClimateAudit blog for your scrutiny of our study, which also identified this data processing issue.
Thanks, David Karoly
Print publication of scientific study put on hold
An issue has been identified in the processing of the data used in the study, “Evidence of unusual late 20th century warming from an Australasian temperature reconstruction spanning the last millennium” by Joelle Gergis, Raphael Neukom, Stephen Phipps, Ailie Gallant and David Karoly, accepted for publication in the Journal of Climate.
We are currently reviewing the data and results.
1] Last 50 years were Australia’s hottest: study
Matthew Carney, May 17, 2012
2] Gergis et al Put on Hold, Steve McIntyre, June 8, 2012 http://climateaudit.org/2012/06/08/gergis-et-al-put-on-hold/