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sci.geo.meteorology (Meteorology) (sci.geo.meteorology) For the discussion of meteorology and related topics. |
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#1
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![]() How long will meteorologists keep using "hectopascals"? What's wrong with using the SI unit of kilopascals? Surely everybody knows that they are only using hectopascals because they can pretend that they are the old-timey "millibars". If they want to use millibars, then use them. Don't slap a different label on them and pretend that you are SI-compliant when you're not. NO MORE HECTOPASCALS! -- No, YOU'RE A CRACKPOT, which is why you think I'm a crackpot... because all crackpots like you think everybody else is a moron not them. -- George Hammond http://beable.com |
#2
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On 04 Jul 2003 18:35:28 +1000, Beable van Polasm
wrote: How long will meteorologists keep using "hectopascals"? What's wrong with using the SI unit of kilopascals? Surely everybody knows that they are only using hectopascals because they can pretend that they are the old-timey "millibars". If they want to use millibars, then use them. Don't slap a different label on them and pretend that you are SI-compliant when you're not. NO MORE HECTOPASCALS! Silly Beable. Everyone knows that the hectopascal is a unit of area, equal to 100 meters squared. -- Hong Ooi | "There is no Bondi Beach | in Nova Scotia." http://www.zip.com.au/~hong | -- BBC Sydney, Australia | |
#3
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![]() "Beable van Polasm" wrote in message How long will meteorologists keep using "hectopascals"? What's wrong with using the SI unit of kilopascals? Surely everybody knows that they are only using hectopascals because they can pretend that they are the old-timey "millibars". If they want to use millibars, then use them. Don't slap a different label on them and pretend that you are SI-compliant when you're not. NO MORE HECTOPASCALS While we're at it, who says we have to measure snow depth vertically? Why can't we measure tangentially to the surface - just think of the records that will be broken! Or we could measure snow depth in units of area - "I had over an acre of snow on the back porch this morning, with drifts of three hectares against the back door! I had to shovel a square cubit just to get the car out of the garage..." Heck, just the other day at the ballfield, I saw a fellow with a baseball as big as a hailstone! DEATH TO MILLIBARS! |
#4
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On Fri, 04 Jul 2003 13:20:39 GMT, "Bob Harrington"
wrote: "Beable van Polasm" wrote in message How long will meteorologists keep using "hectopascals"? What's wrong with using the SI unit of kilopascals? Surely everybody knows that they are only using hectopascals because they can pretend that they are the old-timey "millibars". If they want to use millibars, then use them. Don't slap a different label on them and pretend that you are SI-compliant when you're not. NO MORE HECTOPASCALS While we're at it, who says we have to measure snow depth vertically? Why can't we measure tangentially to the surface - just think of the records that will be broken! Or we could measure snow depth in units of area - "I had over an acre of snow on the back porch this morning, with drifts of three hectares against the back door! I had to shovel a square cubit just to get the car out of the garage..." Some do measure rainfall in liters per square meter, an acceptable unit for this purpose. Heck, just the other day at the ballfield, I saw a fellow with a baseball as big as a hailstone! DEATH TO MILLIBARS! Naturally. Those obsolete units didn't even fit in with the cgs predecessors of SI, the modern metric system, the International System of Units which was introduced 43 years ago. The cgs unit of pressure was the barye (a millibar is a kilobarye, or 1000 dyn cm/s²). There has, of course, been considerable pressure to get rid of those obsolete millibars. If it weren't for that, we wouldn't have the problem that the OP is complaining about. Unfortunately, those applying the pressure to get rid of millibars as pressure unit weren't smart enough to explain what the proper SI units would be (i.e., the units used by Canada in their public weather reports, the units I hear used on Canadian TV and radio: kilopascals). This left the door open for this screwball scheme to hang onto millibars by disguising them under a pseudo-SI name. Gene Nygaard http://ourworld.compuserve.com/homep...d/hectopas.htm Gene Nygaard http://ourworld.compuserve.com/homepages/Gene_Nygaard/ |
#5
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Gene Nygaard writes:
On Fri, 04 Jul 2003 13:20:39 GMT, "Bob Harrington" wrote: While we're at it, who says we have to measure snow depth vertically? Why can't we measure tangentially to the surface - just think of the records that will be broken! Or we could measure snow depth in units of area - "I had over an acre of snow on the back porch this morning, with drifts of three hectares against the back door! I had to shovel a square cubit just to get the car out of the garage..." Some do measure rainfall in liters per square meter, an acceptable unit for this purpose. Ah, but how do they measure the square metres? Compare these two ASKY ART diagrams: -------------- \ / \ / \ / \ / \ / \ / -- Does the level ground or the sloping ground have greater surface area? What about for measuring rainfall purposes? Heck, just the other day at the ballfield, I saw a fellow with a baseball as big as a hailstone! DEATH TO MILLIBARS! Naturally. Those obsolete units didn't even fit in with the cgs predecessors of SI, the modern metric system, the International System of Units which was introduced 43 years ago. The cgs unit of pressure was the barye (a millibar is a kilobarye, or 1000 dyn cm/s²). There has, of course, been considerable pressure to get rid of those obsolete millibars. If it weren't for that, we wouldn't have the problem that the OP is complaining about. What annoys me is that everybody knows that air pressure is about 15 psi, right? And I know that I want my truck tyres to be inflated to about 30psi front, and 45psi rear. So I go to the service station, and the air hose meter is calibrated in kPa. I think about the weather report, and they say that atmospheric pressure is 996 hPa, so then I double and triple it to get about 2000 hPa and 3000 hPa, and then I look at the air hose meter and it's kPa, and I have to convert the pressures so that I can pump up my tyres! Because unless my tyres are EXACTLY two atmospheres' pressure front and three atmospheres' pressure rear, then MAYBE my truck's handling will be adversely affected! That's why I always let some air out of my tyres if there's a cyclone coming, and put a bit more in for fine weather! ALWAYS DEFLATE YOUR TYRES IF IT'S RAINING! Some people will tell you that you should also deflate your tyres if you are crossing a sandy creek or gully, but that's just silly. You'll just have to pump them up again on the other side. You're better off just winching across. Unfortunately, those applying the pressure to get rid of millibars ^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^ HAW HAW! THAT'S FUNNY! as pressure unit weren't smart enough to explain what the proper SI units would be (i.e., the units used by Canada in their public weather reports, the units I hear used on Canadian TV and radio: kilopascals). This left the door open for this screwball scheme to hang onto millibars by disguising them under a pseudo-SI name. If I ever meet a real live meteorologist, first of all I'm going to ask her how many meteors she's actually seen, then I'm going to use wacky units to measure everything. "Yes I was driving my truck along at 167024.24 furlongs/fortnight, when suddenly a kangaroo jumped out in front! This kangaroo was at least 216 barleycorns high! So I did the only safe thing and ran into it. At least I salvaged 750 hectograms of meat for the dog out of this sad incident". cheers Beable -- No, YOU'RE A CRACKPOT, which is why you think I'm a crackpot... because all crackpots like you think everybody else is a moron not them. -- George Hammond http://beable.com |
#6
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Beable van Polasm writes:
If I ever meet a real live meteorologist, first of all I'm going to ask her how many meteors she's actually seen, then I'm going to use wacky units to measure everything. "Yes I was driving my truck along at 167024.24 furlongs/fortnight, when suddenly a kangaroo jumped out in front! This kangaroo was at least 216 barleycorns high! So I did the only safe thing and ran into it. At least I salvaged 750 hectograms of meat for the dog out of this sad incident". How many cubits per hogshead does your truck get? -- Joe Bay Impeach Ford Reagan Bush Clinton Bush Cancer Biology Twelve Galaxies Stanford University Guiltied to a Zegnatronic Stanford, California Rocket Society |
#8
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On 06 Jul 2003 09:30:56 +1000, Beable van Polasm
wrote: Some people will tell you that you should also deflate your tyres if you are crossing a sandy creek or gully, but that's just silly. You'll just have to pump them up again on the other side. You're better off just winching across. No, you need to inflate your tires to the point that the entire vehicle will float, wait for a downpour, then simply row across. HTH. HAND. -- I don't know why you people seem to think this is magic, it's just this little chromium switch here... Ah you people are SO superstitious... |
#9
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![]() "Gene Nygaard" wrote in message ... Naturally. Those obsolete units didn't even fit in with the cgs predecessors of SI, the modern metric system, the International System of Units which was introduced 43 years ago. The cgs unit of pressure was the barye (a millibar is a kilobarye, or 1000 dyn cm/s²). There has, of course, been considerable pressure to get rid of those obsolete millibars. If it weren't for that, we wouldn't have the problem that the OP is complaining about. Unfortunately, those applying the pressure to get rid of millibars as pressure unit weren't smart enough to explain what the proper SI units would be (i.e., the units used by Canada in their public weather reports, the units I hear used on Canadian TV and radio: kilopascals). This left the door open for this screwball scheme to hang onto millibars by disguising them under a pseudo-SI name. If the barye is an official cgs unit, then what makes the BAR, 1,000,000 dynes per square cm, any less official. and a 1,000th of a bar is a millibar, and hence just as official as the barye. The kilopascal came to be the unit of media "choice" in Canada, only because the bureaucrats liked their numbers to be in the range 0 to 999. Since "normal" atmospheric pressure at sea level is approximately 101.2 kilopascals, they loved it and decreed the kP to be "official". 1,012 was just too large a number for a them. However, to represent meteorological change, the kilopascal is useless: for example, the change from 101 to 104 kilopascals is HUGE, meteorologically speaking, but the measly 3 units (numerically) does not show that adequately. Therefore hectopascals will continue to be the unit of choice for meteorologists, I am sure, in order to show significant change as a significant numerical difference. ....and of course they probably WOULD rather just call them millibars as they have for a few hundred years... but all you correctness police have foisted the PASCAL upon them and so they now have to prevent any further public confusion by at least using the same base unit, albeit with a different sub-multiple. Hectopascals, forever! |
#10
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I think the reason why some people "disapprove" of the hPa unit is because
the prefixes which are powers of 1000 (10^-6=micro, 10^-3=milli, 1, 1000=kilo, 10^3=mega, 10^9=giga etc) are generally preferred. On Mon, 18 Oct 2004, Icebound wrote: "Gene Nygaard" wrote in message ... Naturally. Those obsolete units didn't even fit in with the cgs predecessors of SI, the modern metric system, the International System of Units which was introduced 43 years ago. The cgs unit of pressure was the barye (a millibar is a kilobarye, or 1000 dyn cm/s²). There has, of course, been considerable pressure to get rid of those obsolete millibars. If it weren't for that, we wouldn't have the problem that the OP is complaining about. Unfortunately, those applying the pressure to get rid of millibars as pressure unit weren't smart enough to explain what the proper SI units would be (i.e., the units used by Canada in their public weather reports, the units I hear used on Canadian TV and radio: kilopascals). This left the door open for this screwball scheme to hang onto millibars by disguising them under a pseudo-SI name. If the barye is an official cgs unit, then what makes the BAR, 1,000,000 dynes per square cm, any less official. and a 1,000th of a bar is a millibar, and hence just as official as the barye. The kilopascal came to be the unit of media "choice" in Canada, only because the bureaucrats liked their numbers to be in the range 0 to 999. Since "normal" atmospheric pressure at sea level is approximately 101.2 kilopascals, they loved it and decreed the kP to be "official". 1,012 was just too large a number for a them. However, to represent meteorological change, the kilopascal is useless: for example, the change from 101 to 104 kilopascals is HUGE, meteorologically speaking, but the measly 3 units (numerically) does not show that adequately. Therefore hectopascals will continue to be the unit of choice for meteorologists, I am sure, in order to show significant change as a significant numerical difference. ...and of course they probably WOULD rather just call them millibars as they have for a few hundred years... but all you correctness police have foisted the PASCAL upon them and so they now have to prevent any further public confusion by at least using the same base unit, albeit with a different sub-multiple. Hectopascals, forever! |
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