Re: Windies touring squad

In article <P8x4blKbnqPGFwZ7@xxxxxxxxxxxxxxxxxxxx>,
Robert Henderson <philip@xxxxxxxxxxxxxxxxxxxx> writes:
In message <1178442413.150163.44180@xxxxxxxxxxxxxxxxxxxxxxxxxxx>, Gavin
Cawley <gcc@xxxxxxxxxxxxx> writes

A myriad of measuring techniques? RH, they are called "thermometers"
and rely on thermal expansion of liquids, a very well understood piece
of physics that has not changed since 1659. Romer in the early 1700s
proposed a common temperature scale fixed on the freezing temperature
of brine and boiling point of water, so it is perfectly reasonable to
expect thermometers to be tolerably well callibrated from the mid
1700s at worst. The fact that the individual time series overlap
allows a degree of cross-calibration. Note that Manly is aware of the
difficulties involved and gives caveats in his paper.

Dear oh dear. Variation in the instruments, variation in the expertise
of those taking the measurements, variation in the places where
temperature is taken, variation in period in which readings are taken,
variation in the environment they are taken over time (most readings in
the past were taken in rural circumstances: most in the past 100 years
in urban circumstances). RH

All of which Manley took into account, which - together with searching
for temperature records in obscure places - was why the work took him
over thirty years. Why do you assume that anything that doesn't agree
with your preconceptions must have been produced by an incompetent?

You are criticising from a position of ignorance, since you have clearly
not read the papers which are available on the Web in which he describes
his methodology and which we have cited for you. Reading merely the
first page of his 1974 paper would show you that he had considered all
the factors that you mention. I would quote some of it here, but
unfortunately the online document is a photocopy, so that copy and paste
of the text is not possible.

Many temperature records, all of which he carefully scrutinised, he
found to be unsatisfactory and discarded. For the remaining series,
where there was a substantial overlap in time between two series at
adjacent locations, it was possible to use this to calibrate the earlier
series against the later.
--
John Hall

"I am not young enough to know everything."
Oscar Wilde (1854-1900)
.

Relevant Pages

  • Re: Windies touring squad
    ... >And clearly you've never heard of the Central England Temperature series ... Cobbled together from a myriad of sources and measuring techniques. ... The fact that the individual time series overlap ... Variation in the instruments, variation in the expertise of those taking the measurements, variation in the places where temperature is taken, variation in period in which readings are taken, variation in the environment they are taken over time. ...
    (uk.sport.cricket)
  • Re: oscillations in ntp clock synchronization
    ... But the cyclic variation is strange. ... The oscillation in the offset is of the order of 10usec-- corrected by ... Room temperature isn't the only thing that can cause problems - it ... The ntp is on a 16 sec time scale of reading update. ...
    (comp.protocols.time.ntp)
  • Re: UAH Global Temperature dips in August
    ... Questions have been asked about why our graphics look so very ... is one significant variation - scale. ... Our next graphic is a mixed bag, rather restrained in the temperature ... Finally, our third chart depicts unrestrained temperature variation, ...
    (sci.physics)
  • Re: Radioactive Decay Rates depend on Earth-Sun Distance
    ... temperature *inside* the laboratories would show an equivalent ... It's not solar activity, ... is a variation of 1 or 2 in the fourth significant digit of the decay ...
    (talk.origins)
  • Re: The standard of time and identical clocks
    ... Suppose a projectile fired into a bucket of water raises ... A second projectile raises the temperature ... What if you have a two thermometers that differ in rate changes? ... Or are you going to say the temp rate change caused the temp rate to change. ...
    (sci.physics)
Loading