Do research to learn more about the Goddard Institute of Space Science Surface Temperature Analysis (GISTEMP) temperature measurements used by many scientists to assert that global warming is occurring. One source of such information can be found at http://data.giss.nasa.gov /gistemp/FAQ.html. Read carefully the sections that explain why adjusted rather than raw data is used. Briefly summarize the kinds of adjustments made to temperature measurements and discuss how this affects your confidence in the data.