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Experimental and Casework Validation of Ambient Temperature Corrections in Forensic Entomology*

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Abstract:  This paper expands on Archer (J Forensic Sci 49, 2004, 553), examining additional factors affecting ambient temperature correction of weather station data in forensic entomology. Sixteen hypothetical body discovery sites (BDSs) in Victoria and New South Wales (Australia), both in autumn and in summer, were compared to test whether the accuracy of correlation was affected by (i) length of correlation period; (ii) distance between BDS and weather station; and (iii) periodicity of ambient temperature measurements. The accuracy of correlations in data sets from real Victorian and NSW forensic entomology cases was also examined. Correlations increased weather data accuracy in all experiments, but significant differences in accuracy were found only between periodicity treatments. We found that a >5°C difference between average values of body in situ and correlation period weather station data was predictive of correlations that decreased the accuracy of ambient temperatures estimated using correlation. Practitioners should inspect their weather data sets for such differences.
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Document Type: Research Article

Affiliations: 1: Institute for Conservation Biology and Environmental Management, School of Biological Sciences, University of Wollongong, NSW 2522, Australia. 2: Department of Forensic Medicine, Monash University, 57-83 Kavanagh St., Southbank, Vic. 3006, Australia.

Publication date: January 1, 2012

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