Eric Steig is a glaciologist and geochemist whose research focuses on polar climate variability, with emphasis on the role of climate in ice-sheet change, using ice-core records, climate modeling, and data-assimilation methods. He developed the first successful triple-oxygen-isotope laser spectrometer for H2O. In 2004, he co-founded RealClimate.org, the first prominent blog run by climate scientists. He teaches paleoclimatology, geochemistry, and history of science.