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uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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#21
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Pete B wrote:
"Graham P Davis" wrote in message ... JPG wrote: Well remembered by me as it happened during my Assistant's course at Stanmore in November 1965. I recall a few inches of snow in North London at the time and doing the ob at the mock met office and reporting snow. http://www.wetterzentrale.de/archive...0119651130.gif I don't think it lasted all that long. Martin November 1969 also produced some decent northerly outbreaks. This followed a record October which had produced possibly the best "summer" month of the year - dry (0.5mm at Bracknell), sunny, and very warm. The long-range forecast for November went for more northerly winds than usual, more frosts, and more snow. This was met with some scepticism but the forecast proved to be spot on. Graham Bracknell And in those days, this setup (for 12:00 UTC, Sat 20 Nov): http://www.wetterzentrale.de/topkarten/fsfaxsem.html would have almost certainly produced some 'interesting' weather too as the milder air tried to re-assert itself from the S /SW. Not so likely now though, just rain. In the late sixties, a contributory factor to the cold in northerly weather types was the large amount of ice off East Greenland. If I remember rightly, in November 1969, the ice had already extended as far as Jan Mayen, at least 200NM further SE than it is at the moment. Graham |
#22
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"Pete B" wrote in message
... snipped And in those days, this setup (for 12:00 UTC, Sat 20 Nov): http://www.wetterzentrale.de/topkarten/fsfaxsem.html would have almost certainly produced some 'interesting' weather too as the milder air tried to re-assert itself from the S /SW. Not so likely now though, just rain. Oops, correction, that obviously should have been: http://www.wetterzentrale.de/pics/brack3a.gif It doesn't look anything like as 'good' as it did 24 hrs ago though. :-( -- Pete Please take my dog out twice to e-mail --------------------------------------------------------------- The views expressed above are entirely those of the writer and do not represent the views, policy or understanding of any other person or official body. --------------------------------------------------------------- |
#23
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"Graham P Davis" wrote in message
... Pete B wrote: "Graham P Davis" wrote in message ... JPG wrote: Well remembered by me as it happened during my Assistant's course at Stanmore in November 1965. I recall a few inches of snow in North London at the time and doing the ob at the mock met office and reporting snow. http://www.wetterzentrale.de/archive...0119651130.gif I don't think it lasted all that long. Martin November 1969 also produced some decent northerly outbreaks. This followed a record October which had produced possibly the best "summer" month of the year - dry (0.5mm at Bracknell), sunny, and very warm. The long-range forecast for November went for more northerly winds than usual, more frosts, and more snow. This was met with some scepticism but the forecast proved to be spot on. Graham Bracknell And in those days, this setup (for 12:00 UTC, Sat 20 Nov): http://www.wetterzentrale.de/topkarten/fsfaxsem.html would have almost certainly produced some 'interesting' weather too as the milder air tried to re-assert itself from the S /SW. Not so likely now though, just rain. In the late sixties, a contributory factor to the cold in northerly weather types was the large amount of ice off East Greenland. If I remember rightly, in November 1969, the ice had already extended as far as Jan Mayen, at least 200NM further SE than it is at the moment. Graham This page: http://wwwsat06.met.fu-berlin.de/~wo...E/icetext.html for the ice state in the various months of 2002 contains graphical info about ice extent changes on a year on year basis for individual months from 1966 to 2002. With specific reference to November, the results: http://wwwsat06.met.fu-berlin.de/~wo...2/11/index.htm show Novembers of 1967 and 1968 had an even greater amount of ice in the Atlantic sector than 1969 did. After that, the only November months with high +ve anomalies for ice extent were 1971, 1973 and 1988. Those 3 Novembers also had good, real 'Northerly' cold spells with a reasonable amount of frost and snow. 1973, I remember being my first year at University in Manchester and one day late in the month, a day of snow, even in the middle of the city, although it didn't last long as a temporary warmer interlude followed a low moving south on the eastern side of a high to the west before another few days of frost returned. Both the 1974 and 1989 "winters" that followed are remembered as being very 'zonal' and mild. In contrast, the Novembers of both 1978 and 1981 show little or no +ve ice anomaly compared to the mean, the winters following both being memorable for cold and snow in December & January. Strangely, November 1972 though had the second lowest ice extent in the sector, only 2000 having less. It is perhaps unfortunate that this particular analysis hasn't been updated since 2002 but the conclusion that has to be drawn from *some* of the monthly results is that the late 1960's were, on the whole, unusually icy compared to the 30 years since. It is hard to say that from 1970 to 2002, there has been a significant overall drop in the average amount for specific months since, at least in this sector! -- Pete Please take my dog out twice to e-mail --------------------------------------------------------------- The views expressed above are entirely those of the writer and do not represent the views, policy or understanding of any other person or official body. --------------------------------------------------------------- |
#24
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Pete B wrote:
"Graham P Davis" wrote in message ... Pete B wrote: "Graham P Davis" wrote in message ... JPG wrote: Well remembered by me as it happened during my Assistant's course at Stanmore in November 1965. I recall a few inches of snow in North London at the time and doing the ob at the mock met office and reporting snow. http://www.wetterzentrale.de/archive...0119651130.gif I don't think it lasted all that long. Martin November 1969 also produced some decent northerly outbreaks. This followed a record October which had produced possibly the best "summer" month of the year - dry (0.5mm at Bracknell), sunny, and very warm. The long-range forecast for November went for more northerly winds than usual, more frosts, and more snow. This was met with some scepticism but the forecast proved to be spot on. Graham Bracknell And in those days, this setup (for 12:00 UTC, Sat 20 Nov): http://www.wetterzentrale.de/topkarten/fsfaxsem.html would have almost certainly produced some 'interesting' weather too as the milder air tried to re-assert itself from the S /SW. Not so likely now though, just rain. In the late sixties, a contributory factor to the cold in northerly weather types was the large amount of ice off East Greenland. If I remember rightly, in November 1969, the ice had already extended as far as Jan Mayen, at least 200NM further SE than it is at the moment. Graham This page: http://wwwsat06.met.fu-berlin.de/~wo...E/icetext.html for the ice state in the various months of 2002 contains graphical info about ice extent changes on a year on year basis for individual months from 1966 to 2002. With specific reference to November, the results: http://wwwsat06.met.fu-berlin.de/~wo...2/11/index.htm show Novembers of 1967 and 1968 had an even greater amount of ice in the Atlantic sector than 1969 did. After that, the only November months with high +ve anomalies for ice extent were 1971, 1973 and 1988. Those 3 Novembers also had good, real 'Northerly' cold spells with a reasonable amount of frost and snow. 1973, I remember being my first year at University in Manchester and one day late in the month, a day of snow, even in the middle of the city, although it didn't last long as a temporary warmer interlude followed a low moving south on the eastern side of a high to the west before another few days of frost returned. Both the 1974 and 1989 "winters" that followed are remembered as being very 'zonal' and mild. In contrast, the Novembers of both 1978 and 1981 show little or no +ve ice anomaly compared to the mean, the winters following both being memorable for cold and snow in December & January. Strangely, November 1972 though had the second lowest ice extent in the sector, only 2000 having less. It is perhaps unfortunate that this particular analysis hasn't been updated since 2002 but the conclusion that has to be drawn from *some* of the monthly results is that the late 1960's were, on the whole, unusually icy compared to the 30 years since. It is hard to say that from 1970 to 2002, there has been a significant overall drop in the average amount for specific months since, at least in this sector! Thanks for pointing me to this site. I'd argue with some of the data as regards the maximum ice limits for the period concerned. For instance, in the spring of 1966, the ice in the Barents Sea extended East of Murmansk, running northwards from the coast at about 33E. Also, in the spring of 1967(?) the ice was hard onto the North Iceland coast, extending well round the SE coast. On another occasion the Odden linked across to the ice near Bear Island, causing the normally open area SW of Svalbard to be ice-covered. I suspect these maps may have been compiled from monthly charts, valid at the end of the month perhaps, so missing extreme events during the month. I think the year I was thinking of could have been 1968 instead of 1969 though the graphs cover too large an area to be sure of this. East Greenland ice conditions worsened through the sixties, but with a biennial oscillation. I think the winters 66/7 and 68/9 were typified by a low-pressure anomaly in the Norwegian Sea; 65/6 and 67/8 tended towards Scandinavian highs. The former would have been more conducive to heavy ice years for East Greenland. I remember looking at the temperatures for Jan Mayen for 1951-70. For each month, the warmest year in the sixties was colder than the coldest month in the fifties! At the end of the sixties, the centre of the cold winter weather, which had been moving westwards during the decade, jumped from East to West Greenland. This marked the end of the severe ice years for East Greenland and began the severe winters which affected Eastern America in the early seventies. During the sixties that region had had relatively light ice conditions. There are recent archives of ice charts at http://www.seaice.de/. Graham |
#25
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On Wed, 17 Nov 2004 13:11:33 +0000, Graham P Davis wrote in
snip I think the year I was thinking of could have been 1968 instead of 1969 though the graphs cover too large an area to be sure of this. East Greenland ice conditions worsened through the sixties, but with a biennial oscillation. I think the winters 66/7 and 68/9 were typified by a low-pressure anomaly in the Norwegian Sea; 65/6 and 67/8 tended towards Scandinavian highs. The former would have been more conducive to heavy ice years for East Greenland. snip IIRC it was indeed 1968 which had the greatest amount of ice to our north. I used to mention to my students that year was the only one last century when polar bears were able cross to Iceland over the ice. A quick look on Google led me to this page which has an interesting section on this ice. http://website.lineone.net/~polar.pu...hedriftice.htm -- Mike 55.13°N 6.69°W Coleraine posted to uk.sci.weather 17/11/2004 17:06:05 UTC |
#26
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On Wed, 17 Nov 2004 17:06:05 +0000, Mike Tullett wrote in
snip http://website.lineone.net/~polar.pu...hedriftice.htm I forgot to paste this in from the page above: quote In 1968 polar ice off Iceland was more extensive than it had been since 1888. This unusual ice winter began when the weather station attendant in Grímsey woke up to a frightening reality on the morning of December 5, 1967. The island was surrounded by polar ice. The small island of Grímsey, crossed by the Arctic Circle itself, is the most northerly settlement in Iceland. The panorama facing the weather station attendant was the beginning of a major event, as the ice persisted for month after month along the northern coast of Iceland and even in the East Fjords, until well into June and did not disappear completely until midsummer. endquote -- Mike 55.13°N 6.69°W Coleraine posted to uk.sci.weather 17/11/2004 17:14:29 UTC |
#27
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All this talk of ice. Just imagine what happens when the ice does finally
melt in the poles... what chance of cold, snowy weather for the UK by then? --------------------------------------------------------- "Mike Tullett" wrote in message ... On Wed, 17 Nov 2004 13:11:33 +0000, Graham P Davis wrote in snip I think the year I was thinking of could have been 1968 instead of 1969 though the graphs cover too large an area to be sure of this. East Greenland ice conditions worsened through the sixties, but with a biennial oscillation. I think the winters 66/7 and 68/9 were typified by a low-pressure anomaly in the Norwegian Sea; 65/6 and 67/8 tended towards Scandinavian highs. The former would have been more conducive to heavy ice years for East Greenland. snip IIRC it was indeed 1968 which had the greatest amount of ice to our north. I used to mention to my students that year was the only one last century when polar bears were able cross to Iceland over the ice. A quick look on Google led me to this page which has an interesting section on this ice. http://website.lineone.net/~polar.pu...hedriftice.htm -- Mike 55.13°N 6.69°W Coleraine posted to uk.sci.weather 17/11/2004 17:06:05 UTC |
#28
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"JPG" wrote in message ...
Well remembered by me as it happened during my Assistant's course at Stanmore in November 1965. I recall a few inches of snow in North London at the time and doing the ob at the mock met office and reporting snow. http://www.wetterzentrale.de/archive...0119651130.gif I don't think it lasted all that long. Martin Don't know whether I've missed this in the previous posts but 42 years ago today was the start of a short northerly outbreak with widespread snow http://www.wetterzentrale.de/archive...1962111712.gif This was followed by very foggy conditions early December 1962 http://www.wetterzentrale.de/archive...1962120412.gif then a mobile westerly flow and then? Not even going there ![]() Regards, Rob Chester, UK http://www.west-cheshire.ac.uk/weather/ |
#29
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Don't know whether I've missed this in the previous posts but 42 years
ago today was the start of a short northerly outbreak with widespread snow http://www.wetterzentrale.de/archive...1962111712.gif This was followed by very foggy conditions early December 1962 http://www.wetterzentrale.de/archive...1962120412.gif then a mobile westerly flow and then? Not even going there ![]() Regards, Rob Chester, UK http://www.west-cheshire.ac.uk/weather/ Strange you should say that Rob - I was thinking exactly the same but didn't have the confidence to write it! Just goes to show I suppose that the November cold snaps are not a reliable guide to what may come after. Mind you I think global warming has done more than raise the temperature - it seems to have changed the flow patterns in the northern hemisphere - so perhaps we are being unduly optimistic even in wishful thinking! Cheers James -- James Brown |
#30
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"danny(West Kent)" wrote in
message .. . All this talk of ice. Just imagine what happens when the ice does finally melt in the poles... what chance of cold, snowy weather for the UK by then? http://www.thedayaftertomorrow.com/s...d/uk/index.php -- Pete Please take my dog out twice to e-mail --------------------------------------------------------------- The views expressed above are entirely those of the writer and do not represent the views, policy or understanding of any other person or official body. --------------------------------------------------------------- |
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