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Biases in the Australian high quality temperature network

journal contribution
posted on 06.12.2017, 00:00 by David Stockwell, K Stewart
Various reports identify global warming over the last century as around 0.7°C, but warming in Australia at around 0.9°C, suggesting Australia may be warming faster than the rest of the world. This study evaluates potential biases in the High Quality Network (HQN) compiled from 100 rural surface temperature series from 1910due to: (1) homogeneity adjustments used to correct for changes in location and instrumentation, and (2) the discrimination of urban and rural sites. The approach was to compare the HQN with a new network compiled from raw data using the minimal adjustments necessary to produce contiguous series, called the Minimal Adjustment Network (MAN). The average temperature trend of the MAN stations was 31% lower than the HQN, and by a number of measures, the trend of the Australian MAN is consistent with the global trend. This suggests that biases from these sources have exaggerated apparent Australian warming. Additional problems with the HQN include failure of homogenization procedures to properlyi dentify errors, individual sites adjusted more than the magnitude of putative warming last century, and some sites of such poor quality they should not be used, especially under a “High Quality” banner.

History

Volume

23

Issue

8

Start Page

1273

End Page

1294

Number of Pages

22

eISSN

2048-4070

ISSN

0958-305X

Location

United Kingdom

Publisher

Multi-Science Publishing Co

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Higher Education Division (2013- ); TBA Research Institute;

Era Eligible

Yes

Journal

Energy & environment.