1. Vostok Ice Core Data Red=temperature; blue = carbon dioxide

2. Vostok Ice Core Data 55K yrs ~20k yrs ~20k yrs~20k yrs ~20k yrs ~60K yrs ~75K yrs ~95K yrs 3. Max level = 290 ppm 180 ppm 4. National Climate Data Center (NCDC) And the Climate Research Unit (CRU) Independent analysis Of temperature Anomaly show the Same trend in temp data over the last Century. 5. Graphic expands The data for the Last 500 years. Shows that the Carbon dioxide Has risen sharply As have temps Since the late 1800s 6. Glacial Retreat In Glacier National Park (GNP), MT some effects of global climate change are strikingly clear. Glacier recession is underway, and many glaciers have already disappeared. The retreat of these small alpine glaciers reflects changes in recent climate as glaciers respond to altered temperature and precipitation. It has been estimated that there were approximately 150 glaciers present in 1850, and most glaciers were still present in 1910 when the park was established. In 2010, we consider there to be only 25 glaciers larger than 25 acres remaining in GNP. 7. Thinning of the Antarctic Ice shelf and Arctic Ice shows the effects of warmer temperatures. 8. Greenland Ice Sheet Changes http://nsidc.org/greenland-today/ 9. Summary Global Climate change is due to many factors Has been a natural phenomenon for 100K of years Evidence seems to indicate human actions are accelerating the natural change. Evidence of Climate change changes in temperature world wide Changes in severe weather patterns Changes in rain patterns Changes in ice/glacier coverage