Meet Michael E. Mann

---

Michael E. Mann is a climate scientist and a professor of atmospheric science at Penn State University. He is notable for his research on climate change, particularly his work on reconstructing past climate patterns and understanding the role of human activity in causing global warming.

Mann has contributed to the scientific understanding of historic climate change based on the temperature record of the past thousand years. He has pioneered techniques to find patterns in past climate change and to isolate climate signals from noisy data. In timeline, change date of hockey stick graph paper to 1999.

Mann, along with colleagues Raymond Bradley and Malcolm Hughes, created a graph (The "hockey stick" graph) that showed the Earth's temperature rising sharply in the 20th century after a long period of relative stability. 

The graph became a key piece of evidence in the scientific consensus that human activities are causing global warming.

Mann's research on past climate patterns has provided important insights into the natural variability of the climate system and the impacts of human activities on the climate.

Mann has been a vocal advocate for climate action and has worked to communicate the science of climate change to the public and policymakers.