Changes

:* The final one is at NASA ([[GISS]]), the Goddard Institute for Space Studies.  

:* The final one is at NASA ([[GISS]]), the Goddard Institute for Space Studies.  

The three groups take raw data, and they "homogenize" it to remove temperature discrepancy's 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 Celcius per century. After the homogenization, they were warming at 1.2 Celcius per century.