Rosanne D'Arrigo is a professor at Lamont–Doherty Earth Observatory at Columbia University known for her research into climate change using dendrochronology, or dating based on tree rings.
D'Arrigo grew up in the Bronx and describes herself as a "winter weather enthusiast" when large amounts of snow required shoveling and kept her home from school.
[3] In 2019, D'Arrigo was elected a fellow of the American Geophysical Union who cited her "for insightful, rigorous, and original contributions to the development of high-resolution paleoclimatology, particularly dendroclimatology".
[7] Using tree-ring data from trees in Canada and Alaska, D'Arrigo has established a timeline for annual temperatures in North America over the past 300 years.
[9][10][11] During the 2009 controversy on climate change, D'Arrigo's noted[12] that her research dating to 1995 had already published details on the divergence problem, which is the issue where warming since the 1950s does not appear in tree ring datasets.