Check the International Tree Ring Databank for >75 tree ring collections. Browse the NOAA National Climate Data Center for paleoclimatic reconstructions.

Cleaned Version of the International Tree-Ring Databank

As a lab group project, we  cleaned the entire International Tree-Ring Databank to reduces difficulties in using the >4000 tree-ring collections distributed around the globe.


* Zhao, S., N. Pederson, L. D’Orangeville, J. HilleRisLambers, E. Boose, C. Penone, B. Bauer, Y. Jiang, and R. Manzanedo. 2018. The International Tree Ring Data Bank (ITRDB) revisited: Data availability and global ecological representativity. Journal of Biogeography 10.1111/jbi.13488 Revised ITRDB available here.

Mongol Empire Ring Width & Climate Data

Neil Pederson, Amy E. Hessl,[Joint Lead Authors] – Nachin Baatarbileg, Kevin J. Anchukaitis, and Nicola Di Cosmo. 2014. Pluvials, droughts, the Mongol Empire, and modern Mongolia. Proceedings of the National Academy of Sciences, 111(12), 4375-4379. doi: 10.1073/pnas.1318677111

Kherlen Gol streamflow reconstruction, Mongolia

Nicole K. Davi, Neil Pederson, Caroline Leland, Baatarbileg Nachin, Byambagerel Suran, Gordon C. Jacoby. 2013. Is eastern Mongolia drying? A long-term perspective of a multidecadal trend. Water Resources Research 49: 151-158. DOI: 10.1029/2012WR011834

New York City Watershed PDSI Reconstruction

Neil Pederson, Andrew R. Bell, Edward R. Cook, Upmanu Lall, Naresh Devineni, Richard Seager, Keith Eggleston, and Kevin J. Vranes. 2013. Is an Epic Pluvial Masking the Water Insecurity of the Greater New York City Region? Journal of Climate 26: 1339-1354 DOI:

 Yeruu Gol streamflow reconstruction, Mongolia

Neil Pederson, Caroline Leland, Baatabileg Nachin, Amy E. Hessl, Andrew R. Bell, Dario Martin-Benito, Tom Saladyga, Byamba Suran, Peter M. Brown, Nicole K. Davi. 2012. Three centuries of shifting hydroclimatic regimes across the Mongolian Breadbasket. Agricultural and Forest Meteorology 178-179: 10-20. DOI: 10.1016/j.agrformet.2012.07.003.

Atlanta Watershed & western Georgia PDSI Reconstruction

Neil Pederson, Andrew R. Bell, Troy A. Knight, Caroline Leland, Nathan Malcomb, Kevin J. Anchukaitis, Kacie Tackett, James Scheff, Andrew Brice, Bradly Catron, Will Blozan, and Jess Riddle. 2012. A long-term perspective on a modern drought in the American Southeast. Environmental Research Letters 7: 014034. DOI:10.1088/1748-9326/7/1/014034