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Xanadu 2012: The Biothroposphere |
Category: Articles 2 comments 11 May 2005 @ 03:57 by swanny : Temp infoThe global average temperature exists as a theoretical concept. If we were able to place a large number of sensors around the world at regular spacings, we would be able to establish a meaningful estimate of the instantaneous average, which could then in turn be averaged over a year to produce a number that is a reasonable representation of the thermal state of the surface of the planet. Unfortunately, such a ground station network does not exist. Not only are the existing sensors poorly distributed, many are placed in thermally atypical sites such as cities and airports, others are in primitive rural areas where they are poorly maintained. Ironically though, it is over the oceans that the most discrepant surface measurements occur. Thus surface weather stations provide a very poor basis for determining average global temperature. Fortunately there is an alternative, which is satellite surveillance. Microwave radiation from oxygen in the atmosphere is temperature dependent and therefore provides a convenient remote thermometer. Because the satellite orbit is continuously scanning the EarthÂ’s surface like a television raster, it is equivalent to a very large number of well-distributed thermometers. As a result it produces a credible estimate of a global average temperature. The results cross calibrate well with data collected by balloons. Less fortunately, the satellite record is relatively short, as the technology has not been around for very long. It shows a slight cooling trend, but all finite data sets show trends that are not necessarily properties of the parent distribution. All the satellite data tell us at the moment is that there are no dramatic changes of temperature occurring. John Brignell April 2004 Temp Projection link = http://www.grida.no/db/maps/prod/level3/id_1461.htm link 2 = http://www.exploratorium.edu/climate/atmosphere/data4.html 13 May 2005 @ 17:57 by swanny : Love Link The Church of Art Link = http://www.webville.biz/church.html Other entries in Articles 23 Aug 2022 @ 09:55: Gravity battery ref 23 Aug 2022 @ 09:53: Gravity battery ???. 2 May 2022 @ 06:45: How to Get Quality Dofollow Backlinks 23 Nov 2021 @ 18:26: What is Linkbuilding 25 Jun 2021 @ 15:37: Longitude at sea? 24 Aug 2020 @ 12:42: Climate and ocean 24 Aug 2020 @ 12:37: Climate update Aug 2020 15 Mar 2020 @ 19:11: Hang in.. 29 Jul 2019 @ 16:12: Onward 28 Feb 2019 @ 14:41: Solar Neighborhood pic
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