A rebuttal of
the main claims
from the Jones et al 1990
letter to Nature
Jones PD, Groisman PYa, Coughlan M,
Plummer N, Wangl WC, Karl TR (1990) Assessment of urbanization effects
in time series of surface air temperatures over land. Nature 347:169-172
Significant
differences in
determinations of mean global surface temperature trends for recent
decades
Richard S Courtney Email address in full
version
Previously unpublished
paper by Hughes and Balling , "Eastern
Australia temperature variations 1930-1992"
rejected in review in the mid-1990's.
Still the best attempt to compile a rural temperature trend for Eastern
Australia.
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1995
paper by Warwick
S.
Hughes, Comment
on D.E. Parker, "Effects of Changing
Exposure
of Thermometers at Land Stations." International
Journal of
Climatology,
Vol. 15, pp. 231-234.
1992
Robert C.
Balling, Jr., Sherwood B. Idso, and Warwick S. Hughes.
"Long-Term and Recent Anomalous
Temperature Changes in
Australia."
Geophysical
Research Letters, Vol. 19, No. 23, pp. 2317-2320.
ABSTRACT: Temperature
records from rural station networks are being assembled and
analyzed for many Northern Hemispheric locations. In this study, we
examine the annual mean, maximum, and minimum temperatures from a
network of rural stations in Australia over the period 1911–1990. Our
findings show general cooling from 1911 to 1978 with a steady decrease
in the diurnal temperature range. The cooling in the mean temperature
results from a decrease in maximum temperature that is larger than the
increase in minimum temperature. However, in the late 1970s, maximum,
minimum, and mean temperatures all rose sharply, although the daily
temperature range continued its steady decline. This discontinuity in
the Australian temperature record is similar in magnitude and timing to
discontinuities found in the Northern Hemispheric climate system.
Whether it is related to the buildup of greenhouse gases or some other
cause, is unknown.
Four pages scanned here, Page 1; Page 2;
Page 3;
Page 4.
early
1990's Ian Butterworth (BoM) "On the inhomogeneity of
climatic temperature records at Darwin" This was faxed to me in
the 1990's and kept on thermal roll paper which faded badly but after
scanning the image has been tweaked to be readable.
Page one,
page
two, page
three, page
four.
IMHO this paper reads like a BoM message pointing out that it is
inadvisable to simply join Darwin PO to Airport (as Jones et al 1986
did and CRUT3 does
to this day), which produces a non-climatic cooling trend . I agree
with the BoM that this produces a wrong trend and in 1991 made my
own "join" between Darwin PO and AP. - which I will show in due course.
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