Thank you LB
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What would the scientific community's prediction have been for the climate at the height of the little ice age 300 years ago? |
If there was indeed a "little ice age", and it's not clear it's a global feature, then without a "white tundra summer", there would be no sign of an onset.
Currently, blue arctic ocean summers and melting permafrost are rather more of a concern. |
There's also the North Atlantic Oscillation (NAO) to screw with our weather - this was only discovered 90 odd years ago. Plus the magnetic pole is due a flip as well as an ice age or a super-tsunami.
Finally, a large meteorite is overdue that could stop global warming; either by wiping out a large amount of the population (and their carbon emissions) or by throwing up loads of material into the atmosphere that will block the warming from the sun. Finally, fossil fuels will dwindle and other sources of energy will need to be used. So in 50-100 years time when we all have cold fusion reactors powering our cars, ships, trains and planes, then the problems of the 'sandalista' will need to change tack. I would rather bet on West Ham winning the Premiership 3 times over the next 100 years than try to predict what the weather/climate/environment has in store over the same time period. LJ :ok: |
I'll give you no better than evens on the Hammers, LJ, the future is almost impossible to predict, as your quick handful of variables so eloquently indicates.
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You're very generous my friend - I'll take those odds! :ok:
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Military 'may have to abandon flood-prone bases'
Langley old chap, as A non merman weather guesser who was mainly in Atlantic lows deep and far out giving good surf could you elaborate as to why moving or blocking your widget matters so much please
I am a curious george! |
Let's put a tenner on it then. I'll buy a canoe with my winnings and I'm going to save a fortune on my heating bills by all accounts!
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Quote: Weren't we supposed to be having 'the coldest winter for years' in 2014? Ahh BEagle old chap, you've confirmed yourself as a Daily Depress reader - the paper who persist with their not-in-the-slightest-bit-exagerated doom laden headlines from the bloke-in-a-shed weather "forecaster" that proved to be completely wrong on pretty much every occasion. Even seaweed would have given a better prediction! The headlines do make us chuckle at work, although it worries us a little that people think it's us making those predictions! As for the Daily Heil's and Depress' claims about the seasonal forecast being wrong, well, they're cherry picking from something they don't understand to make news out of nothing and find someone else to blame - oh, and coincidentally try to claim they got it right (they didn't - as you say, remember the aforementioned coldest winter on record headlines they ran?) Hopefully not too many people believe every word they read.... Oh, they do? So you have about another 10 months until we actually hit Winter 2014, or does your piece of seaweed on the washing line predict that far forward? :p |
International standard measurement of wind at 10m above ground [up a steel lattice mast in UK], ideally near runway ......... customer iffy about anything near runway so mast sited a LONG way from significant obstructions which could disturb wind flow. Obstructions certainly do give values untypical of those at the runway, sometimes blanking gusts, sometimes giving "false" gusts, and very often giving wrong wind direction, even reversal.
In extreme cases, the sudden arrival of a sea breeze or a storm down-draft may not be picked up in time. RAF Nicosia really needed two anemos, one at each end! The sea breeze was often massive, slamming doors and blowing off the staish's cap. |
I would rather bet on West Ham winning the Premiership 3 times over the next 100 years than try to predict what the weather/climate/environment has in store over the same time period. |
LangleyB
Isn't the rule of thumb for obstacles from a windsock or anemometer 10 times the obstruction height? Ie. 6m obstruction must be 60m from obstruction? Also, I seem to remember that there are factors to apply if your wind measurement isn't at the prescribed 10m. If it's less then you apply a factor of greater than 1 and if it is more than 10m then you apply a factor of less than 1. Ie. 8m wind measurement of 8kts is multiplied by 1.1 and so the actual wind is observed at 8.8kts? (My factor may not be the right factor, but you get my drift?) LJ |
In fact, I found the Met Observer's Handbook on the Met Office website and it is add 10% for a mast between 5-7m, add 20% for 3-4m and a massive 30% for 1-2m (ie. a handheld anemometer - I bet many didn't know that!).
LJ |
LB - Nicosia would probably have been better without one at all! In the summer you could have the anemometer reading just about zero, and the windsocks at either end showing approx 30 - 40 kts - only 180 degrees different (the sea breeze from both east and west coasts and a temp of +40C or more)! However, about 500ft up you could almost sit in autorotation and still climb.
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And the award for the most flood-safe airfield goes to - good ole Little Rissington, highest UK runway AMSL as I recall?
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NutLoose said:
Well you might be a MetMan, but this is in effect the winter of 2013 as traditionally the seasons run Spring, Summer, Autumn ( or fall for the colonies) then Winter.. So you have about another 10 months until we actually hit Winter 2014, or does your piece of seaweed on the washing line predict that far forward? and LangleyB: Perhaps metman would care to post the exact wording of the official Met Office winter prediction? here is one who would certainly understand it. thinks ....... is this the same Met Office team that promised a BBQ summer? Thought so. And no, I don't care to post the exact wording... 1. I quite like my job, 2. its not my area of expertise, and 3. I'm sure you know what our intranet site is like and how hard it is to find stuff.... ;) |
QUOTE:
Isn't the rule of thumb for obstacles from a windsock or anemometer 10 times the obstruction height? Ie. 6m obstruction must be 60m from obstruction? From memory that may be the internationally agreed MINIMUM separation. It takes no account of the width or density [think trees] of the obstruction, and is a long way from best practice. Height has a big effect on gustiness, width a big effect on direction and gustiness. Regarding probabilistic forecasts, the great unwashed have a deep instinctive knowledge of probability, as witness racing odds, National Lottery and many life events. The great unwashed also recognise a lot of time and money being spent on unsound science. |
FFF.
Little Rissington 730ft/223 Metres AMSL Dunkeswell* 839ft/256 Metres AMSL It may not be long but it is a surfaced runway |
MadsDad
"Little Rissington 730ft/223 Metres AMSL Dunkeswell* 839ft/256 Metres AMSL" Aye, but that's at the threshold. What about the ruddy great hump in the middle!:) |
FFF, to be honest never been to Little Rissington, but the drainage at Dunkeswell (200 foot + deep valleys to the North and South to provide drainage, with the runway at the top of the hill more or less) would lead me to believe that they aren't going to have flooding problems there* in the near future.
* Except for the potholes in the car park last time I was there, but that's a different story. |
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