[AZ-Observing] Re: Flagstaff nighttime cloudiness/sky brightness
- From: "Bernie Sanden" <bsanden@xxxxxxx>
- To: <dan@xxxxxxxxxxxxx>
- Date: Wed, 20 Jun 2007 22:05:51 -0700
Dan -
In addition, the two favorite astro whines (full moon clearing and
weekend clouding) are not supported by Brian's data. In fact, using the
years 1980 thru 2004, Sat and Sunday had the highest number of clear
nights, though not statistically different than any of the other days of
the week.
- Bernie
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Tom Polakis
Sent: Thursday, June 14, 2007 8:33 AM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: Flagstaff nighttime cloudiness/sky
brightness
---- Dan Heim <dan@xxxxxxxxxxxxx> wrote:
> these days. It would be interesting to run this analysis using data
for the Maricopa County area, where all of my cancellations happened.
Dan,
Since the weather mechanisms are the same (monsoon in Summer and south
ends of passing troughs at other times), I think you would get the same
result.
I have not rigorously collected data, but I have not noticed a change in
cloudiness since 1985. My two pet theories as to why it is common for
people to claim that it's not as clear as it used to be are:
1 - As observers become more advanced, they also become more sensitive
to what used to seem like harmless clouds.
2 - As people age, selective memory makes them reminisce about how good
the good old days used to be.
Tom
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