To: Brumar89 who wrote (835922 ) 2/11/2015 2:40:58 PM From: Brumar89 Respond to of 1576893 Adjustments In Puerto Casado February 10, 2015 By Paul Homewood ftp://ftp.ncdc.noaa.gov/pub/data/ghcn/v3/products/stnplots/3/30886086000.gif Let’s take a closer look at the GHCN temperature adjustments at Puerto Casado, one of the stations in Paraguay we looked at previously. In common with the other Paraguayan sites, a large adjustment was made around 1970, which seems to have been in response to a drop in the annual mean from 24.64C in 1970 to 23.57C the year after. (Although there was a bigger increase in temperature the following year). http://data.giss.nasa.gov/cgi-bin/gistemp/show_station.cgi?id=308860860004&dt=1&ds=1 If this drop of more than a degree had been due to a station move, or other non-climatic factors, you would expect to see a step change in the monthly figures at some point during the year. Yet, as the chart below shows, this is not the case. Monthly temperatures for 1971, expressed as anomalies from 1951-70, are all over the place. With so much variation from month to month, is it possible to isolate a station move from the background of natural variability, even if there had been one? http://data.giss.nasa.gov/tmp/gistemp/STATIONS/tmp_308860860004_1_0/station.txt There are other checks we can make against other nearby stations, outside of Paraguay. Las Lomitas is in Argentina, and Yacuiba in Bolivia. They are both within 400 miles of Puerto Casado.Puerto Las Lomitas Yacuiba 1969 24.83 23.33 23.57 1970 24.64 23.24 22.83 1971 23.57 22.33 22.58
http://data.giss.nasa.gov/cgi-bin/gistemp/find_station.cgi?lat=-22.28&lon=-57.87&dt=1&ds=1 The Argentine station shows a similar drop in temperature between 1970 and 1971. It’s slightly different in Yacuiba, where the drop in temperature was spread over two years. All in all, while the waters are still muddy, there does not appear to be any real evidence to suggest that the temperature drop at Puerto Casado was non-climatic. https://notalotofpeopleknowthat.wordpress.com/2015/02/10/adjustments-in-puerto-casada/ ........... manicbeancounter permalink February 10, 2015 8:50 pm Mikky, My analysis confirms your graph. I built up a temperature anomaly for 8 out of 9 of Paul Homewood’s identified Paraguayan sites – the other was of poor quality with a lot of compensating adjustments. The pattern was of slightly falling average temperatures from late 1940s to 1966; falling temperatures to 1971, (with most of the fall in 1970); then static or slightly rising temperatures through to 2011. This goes totally outside of known experience. The thermometers were not homogenized to others in the area, but to a set view of what the temperature profile should be like . Rather than look at the clear corroborating evidence, the researchers blamed the instruments from decades before. This gives a 1C change in average adjustment in just three years. What is more telling is the consistency of the adjustments across the data sets. http://manicbeancounter.com/2015/02/08/is-there-a-homogenisation-bias-in-paraguays-temperature-data/ ..............This homogenization is nothing more than use an algorithm to adjust away real data and replace it with what SHOULD have happened.