Home |
Search |
Today's Posts |
![]() |
|
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. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#11
![]() |
|||
|
|||
![]() |
#12
![]() |
|||
|
|||
![]() "Col" wrote in message ... "AliCat" wrote in message ... Surface temperature would be below zero across the whole surface of the earth within a few days. The oceans hold an enormous amount of heat and what we would probably recognise as weather systems would continue until they froze to a great enough depth to insulate what heat remains trapped below to such an extent that there was little to differentiate between frozen water and land (in the order of 10's of metres, which would take several months). Thereafter there would be little meridonal flow (N-S/S-N). After a year or two or three surface temperature would be 100K, or less with little or no wind at the surface. Life as we know it would have ceased, but some deep ocean beasties may survive. I doubt access to nuclear/fossil fuels would help us much. Some bacteria may survive in deep freeze for millennia, most gasses would have liquefied/solidified at this kind of timescale, with temperature not far off cosmic microwave background radiation values. I would imagine vast anticyclones of unimaginable intensity would quickly form over all land masses, even the tropical ones. The Sahara can become quite cold at night even now. The temperature contrast from the still warm oceans to that over the land would be enormous. I think that the weather in continental fringes such as the UK would be 'interesting' to say the least! Ferocious blizzards would result, the snow probably piling up many metres high. But of course unlike now when the mild air often wins the cold air will push relentlessly on into the Atlantic....... I'm not sure about this. The Earth would still be spinning, so depressions would still form and move across the continents, transferring energy from the oceans and mitigating the radiative cooling. Once the oceans froze, things would begin to settle down. Whatever, it would really bugger up the global warming advocacy group's "hockey stick" forecast! |
#13
![]() |
|||
|
|||
![]()
In article ,
Dave Ludlow writes: Well Carbon Dioxide snow would be first, at a bit below -78.5 deg C. Has that ever been seen in Antarctica? I believe the lowest temperatures recorded there aren't too far away from that value. -- John Hall "I am not young enough to know everything." Oscar Wilde (1854-1900) |
#14
![]() |
|||
|
|||
![]() "John Hall" wrote in message ... In article , Dave Ludlow writes: Well Carbon Dioxide snow would be first, at a bit below -78.5 deg C. Has that ever been seen in Antarctica? I believe the lowest temperatures recorded there aren't too far away from that value. I was just thinking that. I think the lowest is about -90C. So at least in theory there should be a tiny layer of 'snowed out' CO2 on the surface of the normal snow. Col -- Bolton, Lancashire. 160m asl. http://www.reddwarfer.btinternet.co.uk |
#15
![]() |
|||
|
|||
![]() "Paul C" wrote in message ... On Tue, 23 Sep 2003 20:39:52 +0100, "Col" wrote: .. Oh my God! Does that mean endless snow reports from Nguk ![]() No but it will mean that TWO will predict record high summer temperatures based on no-sun pattern matching. -- Paul |
#16
![]() |
|||
|
|||
![]()
In message , John Hall
writes In article , Dave Ludlow writes: Well Carbon Dioxide snow would be first, at a bit below -78.5 deg C. Has that ever been seen in Antarctica? I believe the lowest temperatures recorded there aren't too far away from that value. From a quick search, the lowest ever recorded temperature was -129°F/-89.4°C at Vostok, Antarctica, on July 21, 1983. Cold enough for CO2 snow! Will -- lancre.net - The personal domain of Will and Cath Wilkinson. Remove REMOVETOMAIL. to send e-mail PGP Fingerprint E089 1736 A023 9E5C AFA3 0B40 E5DC D80A 9E1F D521 Public key can be obtained from ldap://certserver.pgp.com |
#17
![]() |
|||
|
|||
![]()
Well Carbon Dioxide snow would be first, at a bit below -78.5 deg C.
Not so. CO2 would condense out of the atmosphere if the temperature fell to a level at which the vapour pressure of CO2 equalled its partial pressure in the atmosphere. At sea level this is 0.37 mb, and the temperature required is -143°C. At, say 30,000 ft the partial pressure of CO2 would only be 0.12 mb and the temperature required would be even lower, about -148°C. So no CO2 snow. To say that CO2 should condense out below -78.5°C is like saying that water should condense out at all temperatures below 100°C, which of course it doesn't, because its partial pressure is much less than one atmosphere, even in the Persian Gulf. Fortunately(?) for the unfortunate few left on earth, Oxygen and Nitrogen would remain as gases way down to the minus 200s. At MSL pressure the boiling point of oxygen is -183°C and nitrogen -196°C so the "minus 200s" is a bit optimistic. Hydrogen goes a lot lower, of course. (Put that fag out). But we'd all be stiffs by then anyway. Tudor Hughes, Warlingham, Surrey. |
#18
![]() |
|||
|
|||
![]() |
#19
![]() |
|||
|
|||
![]()
In uk.sci.weather on Tue, 23 Sep 2003 at 19:20:19, Alex Stephens Jnr
wrote : The effects on the planet beneath the surface would be equally dramatic no doubt. Forget about electricity or weather, they would disappear. Gradually the earth would cool down to the temperature of empty space (3°K? / -270°C). It would take a long time - the earth's core is pretty hot. -- Paul Hyett, Cheltenham, England |
#20
![]() |
|||
|
|||
![]()
Chris Handscomb wrote:
From a scientific viewpoint, what would happen if the sun just stopped producing light and heat in an instant? What would happen on the day and night sides of the Earth respectively? How long would it take for the Earth to freeze - what would the lowest temperature be? What would happen to the weather systems in the atmosphere, how long would it take for life to become extinct? Would there still be electricity? For how long? Forgetting about the social and political aspects of it? Anyone want to be curious about this and give some answers? Jeremy (not Chris) George W Bush wouldn't worry, just as long as he's secured another ten years of oil supply for the USA. I'll get some candles in, just in case... Excellent question! |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
I went to a car show yesterday and got poured on! | alt.binaries.pictures.weather (Weather Photos) | |||
The Ship that went missing whilst looking for the ships that went missing! | uk.sci.weather (UK Weather) | |||
Not sure where this one went | alt.binaries.pictures.weather (Weather Photos) | |||
The Year the earth Went Wild Tonight on Flannel Four 8pm | uk.sci.weather (UK Weather) | |||
The newsgroup that went away | ne.weather.moderated (US North East Weather) |