||Comments by WSH|
|Reply by D.E. Parker. He
says that, "Precise information about individual station's histories is
nonetheless, more useful than circumstantial evidence, such as
that gleaned by Hughes..."
||DEP's reply creates the
impression that useful information re station histories
exists. The reality is that this is seldom the case, particularly
for century old records that are at issue. See the Gabo Island
|Gabo Island entry in the Victorian
Regional Office Instrument Register, sent to me by the
BoM ~1992 as an example of documentation supporting their
view. To see the notation re Stevenson Screen look for my
SS annotation on the left, then look across to the right. Text detail
Gabo Is is offshore in far eastern Victoria, just south of Cape Howe.
|Note that this "register" of a
few meager lines of script covers a timespan of ~90 years and for a
start there are no entries between 1859 and the 1890's. It is not
clear if the entry Stevenson Screen (SS) July 1901 refers to a
replacement or a new SS. If this is the best documentation the
BoM could offer, then there is indeed very little to be gleaned from
station histories about changes in century old thermometer
enclosures. Which is a view I formed in 1991-92 while searching
in the BoM library.
Nicholls, N., R. Tapp, K. Burrows, and D. Richards. Historical
thermometer exposures in Australia. Int. J. Climatology, 16, 705-710.
|A pdf of the above can be
|| BoM swatting me down. But note on page 709 they conclude - Over
the year, the mean temperatures were about 0.2 degrees C warmer in the
Glaisher stand, relative to the Stevenson screen. - So it
would seem that any questionable pre-1910 Australian data could be used
after all in "global warming" studies, with this minor
adjustment. I could be happy with that.
|1997 Warwick S. Hughes. Comment on, "Historical Thermometer Exposures in Australia." by N. Nichols et al. International Journal of Climatology, Vol. 17, pp. 197-199.|
| A pdf of the above can be
|| I look at the data from the long running (61 yrs) Adelaide Stevenson Screen - Glaisher Stand comparison and find flaws.