17-04-2016, 12:56
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#25
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laeva recumbens anguis
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Join Date: Jun 2006
Age: 67
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Posts: 42,099
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Re: Climate Change - record World temp. rises in Feb.
Quote:
Originally Posted by papa smurf
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http://www.factcheck.org/2015/02/not...perature-data/
Quote:
NOAA maintains about 1,500 monitoring stations, and accumulates data from more than a thousand other stations in countries around the world (many national and international organizations share this type of data freely). There are actually fewer monitoring stations today than there used to be; modern stations have better technology and are accessible in real time, unlike some older outposts no longer in use. The raw, unadjusted data from these stations is available from many sources, including the international collaboration known as the Global Historical Climatology Network and others.
As the years go by, all those stations undergo various types of changes: This can include shifts in how monitoring is done, improvements in technology, or even just the addition or subtraction of nearby buildings.
For example, a new building constructed next to a monitoring station could cast a shadow over a station, or change wind patterns, in such ways that could affect the readings. Also, the timing of temperature measurements has varied over time. And in the 1980s, most U.S. stations switched from liquid-in-glass to electronic resistance thermometers, which could both cool maximum temperature readings and warm minimum readings.
Monitoring organizations like NOAA use data from other stations nearby to try and adjust for these types of issues, either raising or lowering the temperature readings for a given station. This is known as homogenization. The most significant adjustment around the world, according to NOAA, is actually for temperatures taken over the oceans, and that adjustment acts to lower rather than raise the global temperature trend.
The homogenization methods used have been validated and peer-reviewed. For example, a 2012 paper in the Journal of Geophysical Research confirmed the effectiveness of the homogenization processes for NOAA’s network of stations, and even noted that “it is likely that maximum temperature trends have been underestimated.” In other words, there may have actually been more warming than NOAA has reported.
Another paper, from 2010, looked into the siting of U.S. monitoring stations in particular, and again found no problem with the homogenization methods. “[T]he adjusted [U.S. Historical Climatology Network] temperatures are extremely well aligned with recent measurements. … In summary, we find no evidence that the [conterminous United States] average temperature trends are inflated due to poor station siting.”
Berkeley Earth, a climate science nonprofit founded in early 2010 by scientists expressing skepticism at the time about global warming, has also found no undue manipulation of temperature data in its own analyses. Its page specifically on the Paraguayan Puerto Casado station that Homewood mentioned shows the adjusted readings do in fact show a rise in temperature over time.
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btw, Natural News? Whose other reports include -
Mandatory euthanasia coming soon to California so that medical industry can harvest organs from everyone right before killing them
CLAIM: Cell towers across the USA are broadcasting brain resonance frequencies to disrupt human minds, says former DARPA scientist
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