Just looking at the charts of my data for the last two days and noticed
that at almost the same time on both days there's a noticeable (around
1C) increase of temperature just as the temperature peaks at 1:45pm.

You can see the charts he
http://www.canterburyweather.co.uk/d...h=11&year=2005
http://www.canterburyweather.co.uk/d...h=11&year=2005

Any explanation as to what this might be? Is it just coincidence or is
it something to do with my equipment setup or exposure?

It might be nothing, but it caught my attention!

Jonathan
Canterbury, Kent

Jonathan Stott wrote:

Just looking at the charts of my data for the last two days and noticed
that at almost the same time on both days there's a noticeable (around
1C) increase of temperature just as the temperature peaks at 1:45pm.

You can see the charts he
http://www.canterburyweather.co.uk/d...h=11&year=2005
http://www.canterburyweather.co.uk/d...h=11&year=2005

Any explanation as to what this might be? Is it just coincidence or is
it something to do with my equipment setup or exposure?

It might be nothing, but it caught my attention!

Could it be that the sun just catches the screen at that time?


Jonathan
Canterbury, Kent

JPG wrote:
Jonathan Stott wrote:
Any explanation as to what this might be? Is it just coincidence or is
it something to do with my equipment setup or exposure?

Could it be that the sun just catches the screen at that time?

I don't think so - the sun's been out all day with not a cloud in the
sky, so the screen should have been in sunshine from shortly after the
sun rose. I will have to pay attention to the exposure to the sun next
time I'm at home at 1:45pm!

Jonathan
Canterbury, Kent

"Jonathan Stott" wrote in message
...
JPG wrote:
Jonathan Stott wrote:
Any explanation as to what this might be? Is it just coincidence or is
it something to do with my equipment setup or exposure?

Could it be that the sun just catches the screen at that time?

I don't think so - the sun's been out all day with not a cloud in the sky,
so the screen should have been in sunshine from shortly after the sun
rose. I will have to pay attention to the exposure to the sun next time
I'm at home at 1:45pm!

Ever been dazzled by the reflection of the sun on a window on a building or
parked car?
Perhaps, at that time, the sun is just in the right position so that the sun
reflects off a window or shiny surface directly on your sensor?

On Thu, 17 Nov 2005 15:29:54 +0000, Jonathan Stott wrote:

Could it be that the sun just catches the screen at that time?

I don't think so - the sun's been out all day with not a cloud in
the sky, so the screen should have been in sunshine from shortly
after the sun rose.

How about a reflection catching the screen at that time. The shape of
the hump looks very similar to ones that the internal plot here gets
when the unit catches the sun.

--
Cheers
Dave. pam is missing e-mail

Dave Liquorice wrote:
How about a reflection catching the screen at that time. The shape of
the hump looks very similar to ones that the internal plot here gets
when the unit catches the sun.

I was puzzled by the sudden appearance of a brown line in my lawn this
summer (dead straight, very thin and about 1m long). It was only when
I happened to look out of the window late one afternoon that I noticed
the sun was being reflected and focused by a stainless steel garden
fountain I'd put in a couple of months earlier.

It burnt quite a line in the lawn, some distance from the fountain
itself, stopped doing it for a few weeks in late August and then burnt
another one in a different place over a few more weeks in September.

The lawn soon recovers, so I'll live with it but, not having gone
through a whole year yet, I'm a little worried that come the spring it
might start to sear a groove in something just that bit more flammable.
:-)

Regards,

- Tom.

My temperatures had a 'hump' today too! The temperature was rising steadily
by about 1.0C an hour until 14:00 when the temperature jumped from 7.5C to
9.7C in 30 minutes, over double the previous warming rate. I can discount
the effects of the sun shining on the screen as it remains in shadow all day
at this time of year.
________________
Nick G
Exe Valley, Devon
50 m amsl

"Jonathan Stott" wrote in message
...
Just looking at the charts of my data for the last two days and noticed
that at almost the same time on both days there's a noticeable (around 1C)
increase of temperature just as the temperature peaks at 1:45pm.

You can see the charts he
http://www.canterburyweather.co.uk/d...h=11&year=2005
http://www.canterburyweather.co.uk/d...h=11&year=2005

Any explanation as to what this might be? Is it just coincidence or is it
something to do with my equipment setup or exposure?

It might be nothing, but it caught my attention!

Jonathan
Canterbury, Kent

That's interesting. I recorded a max of just 5.0C here in Exwick, a few
miles south of you, with a full day's sun. Hoar frost persisted all day in
the shade on the grass after a min of -3.1C. I am on an east-facing hill,
losing the sun pretty early this time of year - and with flat calm
conditions, it could well have been a couple of degrees warmer on the other
side of the Exe Valley.

Dropped quickly to -0.1C by 17Z last night, but then rose and oscillated
between zero and PS02 overnight beneath a moth-eaten SC layer. Already 5.7C
now, and with a few knots of wind to mix things up, I expect a max of around
8C assuming it remains sunny..

Cheers,

Paul

"Nick G" wrote in message
...
My temperatures had a 'hump' today too! The temperature was rising
steadily by about 1.0C an hour until 14:00 when the temperature jumped
from 7.5C to 9.7C in 30 minutes, over double the previous warming rate. I
can discount the effects of the sun shining on the screen as it remains in
shadow all day at this time of year.
________________
Nick G
Exe Valley, Devon
50 m amsl

"Jonathan Stott" wrote in message
...
Just looking at the charts of my data for the last two days and noticed
that at almost the same time on both days there's a noticeable (around
1C) increase of temperature just as the temperature peaks at 1:45pm.

You can see the charts he
http://www.canterburyweather.co.uk/d...h=11&year=2005
http://www.canterburyweather.co.uk/d...h=11&year=2005

Any explanation as to what this might be? Is it just coincidence or is it
something to do with my equipment setup or exposure?

It might be nothing, but it caught my attention!

Jonathan
Canterbury, Kent

Jonathan Stott wrote:
Just looking at the charts of my data for the last two days and noticed
that at almost the same time on both days there's a noticeable (around
1C) increase of temperature just as the temperature peaks at 1:45pm.

You can see the charts he
http://www.canterburyweather.co.uk/d...h=11&year=2005

http://www.canterburyweather.co.uk/d...h=11&year=2005


Any explanation as to what this might be? Is it just coincidence or is
it something to do with my equipment setup or exposure?

It might be nothing, but it caught my attention!

Jonathan
Canterbury, Kent


I know that on windless nights opening the front door of my house for a
few seconds can raise my thermometer by 2C (It's about 6ft from the
front door). And even setting off the halogen security light can raise
it by 0.5C.


--
Brian Wakem
Email: http://homepage.ntlworld.com/b.wakem/myemail.png