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... > Science Keywords > EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > ATMOSPHERIC PRECIPITATION INDICES > STANDARDIZED PRECIPITATION INDEX

Preferred term

STANDARDIZED PRECIPITATION INDEX  

Definition

  • An index developed by McKee et al. (1993) to quantify precipitation deficit at a given location for multiple timescales. Standardized precipitation is the difference of precipitation from the mean for a specified time divided by the standard deviation, where the mean and standard deviation are determined from the climatological record. The fact that precipitation is not normally distributed is overcome by applying a transformation (i.e., gamma function) to the distribution. (en)

Broader concept

Change note

  • 2014-04-14 14:30:08.0 [128.183.164.42] Insert Concept add broader relation (STANDARDIZED PRECIPITATION INDEX [3b024dec-76c2-4995-a9ad-7e2bf4feda72,106331] - ATMOSPHERIC PRECIPITATION INDICES [c7477201-761f-4cd1-b986-3e99a0be866b,106325]);
  • 2014-04-15 10:38:26.0 [128.183.164.42] added definition insert Definition (id: null text: An index developed by McKee et al. (1993) to quantify precipitation deficit at a given location for multiple timescales. Standardized precipitation is the difference of precipitation from the mean for a specified time divided by the standard deviation, where the mean and standard deviation are determined from the climatological record. The fact that precipitation is not normally distributed is overcome by applying a transformation (i.e., gamma function) to the distribution. language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/3b024dec-76c2-4995-a9ad-7e2bf4feda72

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