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Alternative Method USA Summer PDSI Reconstructions Regional Analysis- Time Series Plots
The 155 grid point PDSI field was separated into eight relatively homogenous regions of summer drought through a cluster analysis. For complete details on the analysis see the full data set description. The data can also be found at that site.
Values for 1700 - 1894 are reconstructed. Data for 1895 to 1978 are instrumental data from Cook et al 1999.
Click on a region number on the map below to get a PDSI time series for that region, or click on link below to view a time series averaged from the entire grid.
Time Series For Entire Grid
Map of Grid Regions required required required required required required required required

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http://www.ncdc.noaa.gov/paleo/zhangpdsi2.html
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Last Updated Wednesday, 20-Aug-2008 11:33:56 EDT by paleo@noaa.gov
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