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SPEIbase v.2

AutorBeguería, Santiago ; Vicente Serrano, Sergio M.
Palabras claveSPEI
Drought Index
Standardized Precipitation-Evapotranspiration Index
Global Warming
Climate change
Climate data
Global data
Fecha de publicación12-abr-2012
CitaciónSPEIbase v.2 [Dataset], 2012
ResumenGlobal gridded dataset of the Standardised Precipitation-Evapotranspiration Index (SPEI) at time scales between 1 and 48 months. Spatial resolution of 0.5º lat/lon. Temporal coverage between January 1901 and December 2009. This is an update of a previous version of SPEIbase (http://hdl.handle.net/10261/22449). What’s new in version 2.0: 1) Data has been extended to the period 1901-2009 (it was 1901-2006 in v 1.0). 2) The FAO-56 Penman-Monteith's method has been used for computing PET instead of Thornthwaite. 3) Unbiased probability weighted moments (ub-pwm) method has been used for fitting the log-Logistic distribution, instead of the sub-optimal plotting-position pwm method used in version 1.0. 4) The whole world is put in one single netCDF file. For more details on the SPEI visit http://www.eead.csic.es/spei.
DescripciónThe Global 0.5° gridded SPEI dataset is made available under the Open Database License. Any rights in individual contents of the database are licensed under the Database Contents License. Users of the dataset are free to share, create and adapt under the conditions of attribution and share-alike.
Use of the newest version is recommended. Older versions are still available to allow replicability.
The Global SPEI database, SPEIbase, offers long-time, robust information on the drought conditions at the global scale, with a 0.5 degrees spatial resolution and a monthly time resolution. It has a multi-scale character, providing SPEI time-scales between 1 and 48 months. The Standardized Precipitatin-Evapotranspiration Index (SPEI) expresses, as a standardized variate (mean zero and unit variance), the deviations of the current climatic balance (precipitation minus evapotranspiration potential) with respect to the long-term balance. The reference period for the calculation, in the SPEIbase, corresponds to the whole study period. Being a standardized variate means that the SPEI condition can be compared across space and time. Calculation of the evapotranspiration potential in SPEIbase is based on the FAO-56 Penman-Monteith method. Data type: float; units: z-values (standard deviations). No land pixels are assigned a value of 1.0x10^30. In some rare cases it was not possible to achieve a good fit to the log-logistic distribution, resulting in a NAN (not a number) value in the database. Dimensions of the dataset: lon = 720; lat = 360; time = 1356. Resolution of the dataset: lon = 0.5º; lat = 0.5º; time = 1 month. Created in R using the SPEI package (http://cran.r-project.org/web/packages/SPEI).
Versión del editorhttp://sac.csic.es/spei/
ReferenciasVicente-Serrano S.M., Beguería S., López-Moreno J.I., 2010: A Multi-scalar drought index sensitive to global warming: The Standardized Precipitation Evapotranspiration Index – SPEI. Journal of Climate 23(7), 1696-1718, DOI: 10.1175/2009JCLI2909.1.-- http://digital.csic.es/handle/10261/22405.
Vicente-Serrano S.M., Beguería S., López-Moreno J.I., Angulo M., El Kenawy A. (2010) A global 0.5° gridded dataset (1901-2006) of a multiscalar drought index considering the joint effects of precipitation and temperature. Journal of Hydrometeorology 11(4), 1033-1043, DOI: 10.1175/2010JHM1224.1.-- http://digital.csic.es/handle/10261/23906.
Beguería S., Vicente-Serrano S.M., Angulo M. A multi-scalar global drought data set: the SPEIbase. Bulletin of the American Meteorological Society, DOI: 10.1175/2010BAMS2988.1.--http://digital.csic.es/handle/10261/29993.
Aparece en las colecciones: (EEAD) Conjuntos de datos
(IPE) Conjuntos de datos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
SPEI_01.nc.gzGlobal 01-month 1901-2009 SPEI320,07 MBNetCDF fileVisualizar/Abrir
SPEI_02.nc.gzGlobal 02-month 1901-2009 SPEI319,7 MBNetCDF fileVisualizar/Abrir
SPEI_03.nc.gzGlobal 03-month 1901-2009 SPEI319,39 MBNetCDF fileVisualizar/Abrir
SPEI_04.nc.gzGlobal 04-month 1901-2009 SPEI319,12 MBNetCDF fileVisualizar/Abrir
SPEI_05.nc.gzGlobal 05-month 1901-2009 SPEI318,88 MBNetCDF fileVisualizar/Abrir
SPEI_06.nc.gzGlobal 06-month 1901-2009 SPEI318,66 MBNetCDF fileVisualizar/Abrir
SPEI_07.nc.gzGlobal 07-month 1901-2009 SPEI318,44 MBNetCDF fileVisualizar/Abrir
SPEI_08.nc.gzGlobal 08-month 1901-2009 SPEI318,24 MBNetCDF fileVisualizar/Abrir
SPEI_09.nc.gzGlobal 09-month 1901-2009 SPEI318,03 MBNetCDF fileVisualizar/Abrir
SPEI_10.nc.gzGlobal 10-month 1901-2009 SPEI317,81 MBNetCDF fileVisualizar/Abrir
SPEI_11.nc.gzGlobal 11-month 1901-2009 SPEI317,59 MBNetCDF fileVisualizar/Abrir
SPEI_12.nc.gzGlobal 12-month 1901-2009 SPEI317,37 MBNetCDF fileVisualizar/Abrir
SPEI_13.nc.gzGlobal 13-month 1901-2009 SPEI317,15 MBNetCDF fileVisualizar/Abrir
SPEI_14.nc.gzGlobal 14-month 1901-2009 SPEI316,93 MBNetCDF fileVisualizar/Abrir
SPEI_15.nc.gzGlobal 15-month 1901-2009 SPEI316,7 MBNetCDF fileVisualizar/Abrir
SPEI_16.nc.gzGlobal 16-month 1901-2009 SPEI316,47 MBNetCDF fileVisualizar/Abrir
SPEI_17.nc.gzGlobal 17-month 1901-2009 SPEI316,22 MBNetCDF fileVisualizar/Abrir
SPEI_18.nc.gzGlobal 18-month 1901-2009 SPEI315,98 MBNetCDF fileVisualizar/Abrir
SPEI_19.nc.gzGlobal 19-month 1901-2009 SPEI315,72 MBNetCDF fileVisualizar/Abrir
SPEI_20.nc.gzGlobal 20-month 1901-2009 SPEI315,46 MBNetCDF fileVisualizar/Abrir
SPEI_21.nc.gzGlobal 21-month 1901-2009 SPEI315,21 MBNetCDF fileVisualizar/Abrir
SPEI_22.nc.gzGlobal 22-month 1901-2009 SPEI314,94 MBNetCDF fileVisualizar/Abrir
SPEI_23.nc.gzGlobal 23-month 1901-2009 SPEI314,68 MBNetCDF fileVisualizar/Abrir
SPEI_24.nc.gzGlobal 24-month 1901-2009 SPEI314,42 MBNetCDF fileVisualizar/Abrir
SPEI_25.nc.gzGlobal 25-month 1901-2009 SPEI314,16 MBNetCDF fileVisualizar/Abrir
SPEI_26.nc.gzGlobal 26-month 1901-2009 SPEI313,9 MBNetCDF fileVisualizar/Abrir
SPEI_27.nc.gzGlobal 27-month 1901-2009 SPEI313,64 MBNetCDF fileVisualizar/Abrir
SPEI_28.nc.gzGlobal 28-month 1901-2009 SPEI313,39 MBNetCDF fileVisualizar/Abrir
SPEI_29.nc.gzGlobal 29-month 1901-2009 SPEI313,13 MBNetCDF fileVisualizar/Abrir
SPEI_30.nc.gzGlobal 30-month 1901-2009 SPEI312,86 MBNetCDF fileVisualizar/Abrir
SPEI_31.nc.gzGlobal 31-month 1901-2009 SPEI312,61 MBNetCDF fileVisualizar/Abrir
SPEI_32.nc.gzGlobal 32-month 1901-2009 SPEI312,35 MBNetCDF fileVisualizar/Abrir
SPEI_33.nc.gzGlobal 33-month 1901-2009 SPEI312,09 MBNetCDF fileVisualizar/Abrir
SPEI_34.nc.gzGlobal 34-month 1901-2009 SPEI311,82 MBNetCDF fileVisualizar/Abrir
SPEI_35.nc.gzGlobal 35-month 1901-2009 SPEI311,57 MBNetCDF fileVisualizar/Abrir
SPEI_36.nc.gzGlobal 36-month 1901-2009 SPEI311,31 MBNetCDF fileVisualizar/Abrir
SPEI_37.nc.gzGlobal 37-month 1901-2009 SPEI311,05 MBNetCDF fileVisualizar/Abrir
SPEI_38.nc.gzGlobal 38-month 1901-2009 SPEI310,79 MBNetCDF fileVisualizar/Abrir
SPEI_39.nc.gzGlobal 39-month 1901-2009 SPEI310,54 MBNetCDF fileVisualizar/Abrir
SPEI_40.nc.gzGlobal 40-month 1901-2009 SPEI310,27 MBNetCDF fileVisualizar/Abrir
SPEI_41.nc.gzGlobal 41-month 1901-2009 SPEI310,02 MBNetCDF fileVisualizar/Abrir
SPEI_42.nc.gzGlobal 42-month 1901-2009 SPEI309,76 MBNetCDF fileVisualizar/Abrir
SPEI_43.nc.gzGlobal 43-month 1901-2009 SPEI309,51 MBNetCDF fileVisualizar/Abrir
SPEI_44.nc.gzGlobal 44-month 1901-2009 SPEI309,25 MBNetCDF fileVisualizar/Abrir
SPEI_45.nc.gzGlobal 45-month 1901-2009 SPEI309 MBNetCDF fileVisualizar/Abrir
SPEI_46.nc.gzGlobal 46-month 1901-2009 SPEI308,74 MBNetCDF fileVisualizar/Abrir
SPEI_47.nc.gzGlobal 47-month 1901-2009 SPEI308,48 MBNetCDF fileVisualizar/Abrir
SPEI_48.nc.gzGlobal 48-month 1901-2009 SPEI308,22 MBNetCDF fileVisualizar/Abrir
file_list.txtList of all files comprising the SPEIbase2,91 kBPlain textVisualizar/Abrir
readme.txtNotes2,12 kBPlain textVisualizar/Abrir
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