1. What river basins and streamflow gages were reconstructed?
    
2. Why should there be a relationship between streamflow and tree growth in the arid and semi-arid western United States?
    
3. How good are the tree-ring based reconstructions of flow when compared to the gaged record?
    
4. Are the gaged and reconstructed records comparable in terms of mean?
    
5. What criteria were used to define extreme streamflow episodes in each basin?
    
6. What types of synchronous extreme streamflow scenarios have occurred in both the observed and reconstructed record and how frequently did each type occur?
    
7. What are the implications of the project results?
    
8. Is the observed frequency of occurrence of HH and LL years greater than can be expected by chance?  What’s the probability of different lengths of LL and HH sequences ?
    
9. What are the implications of the observed tendency for extreme years to occur in sequences or clusters?
    
10. How can the probability of joint multi-year drought occurrence in the two basins be assessed?
     
11.  How have the numbers of LL and HH years varied from century-to-century?
     
12. What atmospheric circulation patterns lead to the LL, HH, LH and HL scenarios?
     
13. Are there any linkages of these anomaly patterns to climate-scale driving mechanisms such as sea surface temperature anomalies, El Niño, La Niña, etc.?
     
14. Is the recent drought unprecedented in severity?

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