Birmingham Winterbourne

(anomalies based upon 1881-2006 means)



February mean temperatures



Mean minimum: 2.6C (+0.8) (39th warmest out of 126 years)

Mean maximum: 8.6C (+2.3) (18th warmest out of 126 years)

Feb. Average: 5.6C (+1.6) (23th warmest out of 126 years)





Dec/Jan/Feb mean temperatures



Mean minimum: 3.3C (+1.5)

Mean maximum: 8.8C (+2.5)

DJF. Average: 6.1C (+2.1)



Note:

Minimum DJF mean temperatures beaten by:

1925 (3.4C);1935 (3.9C);1943 (3.9C);1957 (3.4C);1974 (3.4C)

1975 (3.5C);1989 (4.2C);1990 (4.0C);1998 (3.4C)



Maximum DJF mean temperature new record (although 1899 8.7C)



DJF average temperature beaten by:

1975 (6.3C); 1989 (6.4C) and 1990 (6.2C)





Interesting to note that once again Birmingham Winterbourne

has not shown all-time records as the CET has - in fact since

1971 the CET-Birmingham has shown an increasing bias which

now shows that the CET is +0.4 warmer than Birmingham...



Chris

"CHRIS KIDD" wrote:

Birmingham Winterbourne (anomalies based upon 1881-2006 means)

snip

Interesting to note that once again Birmingham Winterbourne has not shown
all-time records as the CET has - in fact since 1971 the CET-Birmingham
has shown an increasing bias which now shows that the CET is +0.4 warmer
than Birmingham...

Chris, are the data normalised, so that the major site change in,
when was it, 1979? does not influence your results? I notice
the mean min anomaly for February is much smaller than
the general anomaly in the Midlands, which is what one would
expect if you are joining Winterbourne and Edgbaston without
homogenising the records. For various reasons, Edgbaston
enjoyed high minimum temperatures. That would also explain
why you are finding a bias in recent decades.

Philip

Philip,
The difference between CET and Winterbourne has been a gradual,
but steady process over the last 27 years - not a jump - which seems to
imply that it is not the change in station location.

Chris

"Philip Eden" philipATweatherHYPHENukDOTcom wrote in message
...

"CHRIS KIDD" wrote:

Birmingham Winterbourne (anomalies based upon 1881-2006 means)

snip

Interesting to note that once again Birmingham Winterbourne has not shown
all-time records as the CET has - in fact since 1971 the CET-Birmingham
has shown an increasing bias which now shows that the CET is +0.4 warmer
than Birmingham...

Chris, are the data normalised, so that the major site change in,
when was it, 1979? does not influence your results? I notice
the mean min anomaly for February is much smaller than
the general anomaly in the Midlands, which is what one would
expect if you are joining Winterbourne and Edgbaston without
homogenising the records. For various reasons, Edgbaston
enjoyed high minimum temperatures. That would also explain
why you are finding a bias in recent decades.

Philip

"CHRIS KIDD" wrote :
"Philip Eden" philipATweatherHYPHENukDOTcom wrote:
"CHRIS KIDD" wrote:

Birmingham Winterbourne (anomalies based upon 1881-2006 means)

snip

Interesting to note that once again Birmingham Winterbourne has not
shown all-time records as the CET has - in fact since 1971 the
CET-Birmingham has shown an increasing bias which now shows that the CET
is +0.4 warmer than Birmingham...

Chris, are the data normalised, so that the major site change in,
when was it, 1979? does not influence your results? I notice
the mean min anomaly for February is much smaller than
the general anomaly in the Midlands, which is what one would
expect if you are joining Winterbourne and Edgbaston without
homogenising the records. For various reasons, Edgbaston
enjoyed high minimum temperatures. That would also explain
why you are finding a bias in recent decades.

The difference between CET and Winterbourne has been a gradual,
but steady process over the last 27 years - not a jump - which seems to
imply that it is not the change in station location.

That doesn't really answer my question. Are you using
an unadjusted Edgbaston/Winterbourne record for your
statistics?

Philip