Drought indices
Climatic Research Unit : Data

Drought indices

Self-calibrating Palmer Drought Severity Index (scPDSI)

The scPDSI metric was introduced by Wells et al. (2004), who give detailed information about its calculation. The scPDSI is a variant on the original PDSI of Palmer (1965), with the aim to make results from different climate regimes more comparable. As with the PDSI, the scPDSI is calculated from time series of precipitation and temperature, together with fixed parameters related to the soil/surface characteristics at each location.

For Europe (van der Schrier et al., 2006a) and North America (van der Schrier et al., 2006b), we have calculated the scPDSI values using as input the interpolated fields of monthly precipitation and temperature observations available in the CRU high-resolution surface climate data set CRU TS 2.1 (Mitchell and Jones, 2005). These span the period 1901-2002 and are on a resolution of 0.5 degrees longitude by 0.5 degrees latitude.

For the European Alps region (van der Schrier et al., 2007), we have calculated the scPDSI values using as input the interpolated fields of monthly precipitation and temperature observations published by Efthymiadis et al. (2006). These span the period 1800-2003 and are on a resolution of 10 minutes longitude by 10 minute latitude.

These data sets and their associated papers were produced with funding from the UK NERC under the Rapid Climate Change programme (grant NER/T/S/2002/00440). Additional support for co-authors was provided by the European Commission under the SO&P project (EVK2-CT-2002-00160) for Europe and North America, by the European Commission under the ALP-IMP project (EVK2-CT-2002-00148) for European Alps, and by NOAA (NAO30AR4320179) for North America.

scPDSI for Europe (1901-2002, 0.5° lat-lon resolution)

When using these data, please cite:
van der Schrier G, Briffa KR, Jones PD and Osborn TJ (2006a) Summer moisture variability across Europe. Journal of Climate 19, 2818-2834 (doi:10.1175/JCLI3734.1).

scPDSI for North America (1901-2002, 0.5° lat-lon resolution)

When using these data, please cite:
van der Schrier G, Briffa KR, Osborn TJ and Cook ER (2006b) Summer moisture availability across North America. Journal of Geophysical Research 111, D11102 (doi:10.1029/2005JD006745).

scPDSI for European Alps (1800-2003, 10-minute lat-lon resolution)

When using these data, please cite:
van der Schrier G, Efthymiadis D, Briffa KR and Jones PD (2007) European Alpine moisture variability for 1800-2003. International Journal of Climatology 27, 415-427 (doi:10.1002/joc.1411).

References


Last updated: May 2007, Tim Osborn

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