It's probably been answered before - what are the cloudiest UK sites
that have 30-year averages, or at least fairly long records? Someone
on another forum cited Kinlochewe from the Met. tables, but I
understand it has significant daylight loss.

"RWood" wrote :

It's probably been answered before - what are the cloudiest UK sites
that have 30-year averages, or at least fairly long records? Someone
on another forum cited Kinlochewe from the Met. tables, but I
understand it has significant daylight loss.

Yes, the trouble is that the climatologically cloudiest parts of
the UK and Ireland are those very areas where most stations
have poor horizons (and, yes, Kinlochewe among them). Of low
level sites I guess Baltasound (on Unst in Shetland) averages
(CS) about 1020 hours per year; higher up, Great Dun Fell, some
850m up in the northern Pennines, had an average (again, CS)
of just under 1000 hours though how much used to be lost
through rime/ice accretion on the sunshine recorder is
anyone's guess. There's one site in the Irish Republic which
averages under 1000 hours (sorry, can't lay my hands on the
details) but I believe it, too, has a messy horizon.

Philip

On Oct 1, 11:04*am, "Philip Eden" philipATweatherHYPHENukDOTcom
wrote:
"RWood" wrote :

It's probably been answered before - what are the cloudiest UK sites
that have 30-year averages, or at least fairly long records? Someone
on another forum cited Kinlochewe from the Met. tables, but I
understand it has significant daylight loss.

Yes, the trouble is that the climatologically cloudiest parts of
the UK and Ireland are those very areas where most stations
have poor horizons (and, yes, Kinlochewe among them). Of low
level sites I guess Baltasound (on Unst in Shetland) averages
(CS) about 1020 hours per year; higher up, Great Dun Fell, some
850m up in the northern Pennines, had an average (again, CS)
of just under 1000 hours though how much used to be lost
through rime/ice accretion on the sunshine recorder is
anyone's guess. There's one site in the Irish Republic which
averages under 1000 hours (sorry, can't lay my hands on the
details) but I believe it, too, has a messy horizon.

Philip

Thanks Philip! Sounds as if about 1000 hours is a reasonable cutoff
for open lowland locations. A lot more though than the 640 hours
(1941-1995) at our Campbell Island! (interesting for its sub-Antarctic
wildlife however).

On Sep 30, 11:04*pm, "Philip Eden" philipATweatherHYPHENukDOTcom
wrote:
"RWood" wrote :

It's probably been answered before - what are the cloudiest UK sites
that have 30-year averages, or at least fairly long records? Someone
on another forum cited Kinlochewe from the Met. tables, but I
understand it has significant daylight loss.

Yes, the trouble is that the climatologically cloudiest parts of
the UK and Ireland are those very areas where most stations
have poor horizons (and, yes, Kinlochewe among them). Of low
level sites I guess Baltasound (on Unst in Shetland) averages
(CS) about 1020 hours per year; higher up, Great Dun Fell, some
850m up in the northern Pennines, had an average (again, CS)
of just under 1000 hours though how much used to be lost
through rime/ice accretion on the sunshine recorder is
anyone's guess. There's one site in the Irish Republic which
averages under 1000 hours (sorry, can't lay my hands on the
details) but I believe it, too, has a messy horizon.

Philip

It is certainly cloudy on GDF - that's were I did my PhD measuring
clouds - weighing them no less :-)