Science Advances

This PDF file includes:

• fig. S1. PDSI for central Mongolia (99° to 107°E, 46° to 49°N) from observational and reanalysis data.
  
• fig. S2. KLP tree ring chronology used to develop the reconstruction is robust back to 49 BCE.
  
• fig. S3. ULP tree ring chronology used to develop the reconstruction is robust back to 488 CE.
  
• fig. S4. The two tree ring chronologies are both high-fidelity recorders of past drought for Mongolia.
  
• fig. S5. Upper and lower RMSE of the PDSI reconstruction.
  
• fig. S6. Quantile-quantile fits of duration and severity for pluvials and droughts.
  
• fig. S7. Pluvial and drought analysis using adjusted SD reconstruction.
  
• References (43–45)

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