Climate Fingerprints: How Do We Know that Human Activities Have Influenced Global Climate? 2/19/2009 [56k modem] [broadband] [cable/DSL] 103 minutes Benjamin Santer, an atmospheric scientist with the Program for Climate Model Diagnosis and Intercomparison (PCMDI) at Lawrence Livermore National Laboratory, presented a talk on human-caused climate change. His research focuses on identification of natural and anthropogenic "fingerprints" in observed climate records, the use of statistical methods in climate science, and climate model evaluation.