미국
NOAA/WDS Paleoclimatology - Cook et al. 1999 North American Drought Variability PDSI Reconstructions
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Climate Reconstruction. The data include parameters of instrumental with a geographic location of United States Of America. The time period coverage is from 250 to -28 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.