Changes

The three groups take raw data, and they "homogenize" it to remove temperature discrepancies that occur when a station is moved to a warmer or colder location. One of the things that was revealed in the released CRU emails is that the CRU basically uses the Global Historical Climate Network (GHCN) dataset for its raw data.<ref>[http://www.climate-gate.org/search.php?keyword=GHCN&topEmails=&submit=Search Search - GHCN], climate-gate.org, Climategate Document Database.</ref> This raw data is downloaded from GISS, but GISS uses the GHCN raw data as the starting point for their analysis. Both GISS and CRU get almost all of their raw data from GHCN. But the [[IPCC]] uses the "adjusted" data; GHCN adjusts the data to remove what it calls "inhomogeneities."  

The three groups take raw data, and they "homogenize" it to remove temperature discrepancies that occur when a station is moved to a warmer or colder location. One of the things that was revealed in the released CRU emails is that the CRU basically uses the Global Historical Climate Network (GHCN) dataset for its raw data.<ref>[http://www.climate-gate.org/search.php?keyword=GHCN&topEmails=&submit=Search Search - GHCN], climate-gate.org, Climategate Document Database.</ref> This raw data is downloaded from GISS, but GISS uses the GHCN raw data as the starting point for their analysis. Both GISS and CRU get almost all of their raw data from GHCN. But the [[IPCC]] uses the "adjusted" data; GHCN adjusts the data to remove what it calls "inhomogeneities."  

   

   

At [[Darwin]] Airport there are five separate individual station records that are combined to make up the final Darwin record.<ref>[http://data.giss.nasa.gov/cgi-bin/gistemp/findstation.py?datatype=gistemp&data_set=0&name=darwin GISS Surface Temperature Analysis], data.giss.nasa.gov.</ref> In 1941, a station was moved to Darwin Airport. The GHCN then removed the inhomogeneities to adjust the data. Of the five raw datasets at Darwin, the GHCN discarded two. The three remaining records were first homogenized and then averaged to give the "GHCN Adjusted" temperature record for Darwin. Before the GHCN homogenized the data, temperatures in Darwin were falling at 0.7 Celcius per century. After the homogenization, they were warming at 1.2 Celcius per century.  

At [[Darwin]] Airport there are five separate individual station records that are combined to make up the final Darwin record.<ref>[http://data.giss.nasa.gov/cgi-bin/gistemp/findstation.py?datatype=gistemp&data_set=0&name=darwin GISS Surface Temperature Analysis], data.giss.nasa.gov.</ref> In 1941, a station was moved to Darwin Airport. The GHCN then removed the inhomogeneities to adjust the data. Of the five raw datasets at Darwin, the GHCN discarded two. The three remaining records were first homogenized and then averaged to give the "GHCN Adjusted" temperature record for Darwin. Before the GHCN homogenized the data, temperatures in Darwin were falling at 0.7 Celsius per century. After the homogenization, they were warming at 1.2 Celsius per century.  

Willis Eschenbach investigated it and started with the earliest record, "Station Zero" at Darwin. The five different station records (raw data) covering Darwin from 1941 on all agreed almost exactly. What Eschenbach found was that there is "indisputable evidence that the 'homogenized' data has been changed to fit someone’s preconceptions about whether the earth is warming." The blatantly bogus GHCN adjustment for this one station shows that at least one part of the data is bad at Darwin Zero.  

Willis Eschenbach investigated it and started with the earliest record, "Station Zero" at Darwin. The five different station records (raw data) covering Darwin from 1941 on all agreed almost exactly. What Eschenbach found was that there is "indisputable evidence that the 'homogenized' data has been changed to fit someone’s preconceptions about whether the earth is warming." The blatantly bogus GHCN adjustment for this one station shows that at least one part of the data is bad at Darwin Zero.