Discussion of the “hottest year on record” in Australia
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Date
2017
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Wydział Nauk Geograficznych i Geologicznych Uniwersytetu im. Adama Mickiewicza
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Abstract
The global temperature trends provided by the Australian Bureau of Meteorology are artificially exaggerated
due to subjective and unidirectional adjustments of recorded values. The present paper aims to promote the use of the
raw stations’ data corrected only for urban heat island formation. The longer temperature records of Australia exhibit
significant oscillations with a strong quasi-60 years’ signature of downward phases 1880 to 1910, 1940 to 1970 and 2000
to present, and upwards phases 1910 to 1940 and 1970 to 2000. A longer oscillation with downward phase until 1910
and an upwards phase afterwards is also detected. The warming since 1910 occurred at a nearly constant rate. Over
the full length of the long Australian records since the end of the 1800s, there is no sign of warming or increased occurrence
of extreme events. The monthly highest and mean maximum temperatures do not exhibit any positive trend. The
differences between monthly highest and lowest, or monthly mean maximum and mean minimum temperatures, are
all reducing because of urban heat island formation.
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Keywords
tem perature warming, urban heat island, Australia, extreme events
Citation
Quaestiones Geographicae vol. 36 (1), 2017, pp. 79-91
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ISBN
ISSN
0137-477X