CPC Global Unified Gauge-Based Analysis of Daily Precipitation

NOAA/CPC/Precipitation
Dataset Availability
2006-01-01T00:00:00Z–2024-12-17T00:00:00Z
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("NOAA/CPC/Precipitation")

Description

The CPC Unified Gauge-Based Analysis of Global Daily Precipitation dataset offers daily precipitation estimates over land from 1979 to the present. Developed by NOAA's Climate Prediction Center (CPC), it leverages an optimal interpolation technique to combine data from a global network of rain gauges, with over 30,000 gauges contributing to the retrospective version (1979-2005) and around 17,000 to the real-time version (2006-present). Data is provided at a 0.5-degree resolution and includes both precipitation amounts (in 0.1 mm) and the number of gauges used for each grid cell, allowing users to assess data quality.

The dataset's quality is acknowledged to be poor over tropical Africa and Antarctica, and generally varies with gauge density. Real-time data is subject to revision as more complete station data becomes available.

This folder has all the technical documentation.

NOTE: The historical data spanning from 1979 to 2005 is not available in the current version of the dataset.

Bands

Resolution
55500 meters

Bands

Name Units Min Max Description
precipitation mm 0* 10671.5*

Daily total precipitation estimate in 0.1 mm
num_gauges 0* 121*

Number of rain gauges contributing to the precipitation estimate within the 0.5-degree grid cell
* estimated min or max value

Terms of Use

Terms of Use

The NOAA CPC datasets are available without restriction on use or distribution. NOAA PSL does request that the user give proper attribution and identify NOAA PSL, where applicable, as the source of the data.

Citations

Citations:

  • (Interpolation algorithm) Xie_et_al_2007_JHM_EAG.pdf Xie, P., A. Yatagai, M. Chen, T. Hayasaka, Y. Fukushima, C. Liu, and S. Yang (2007), A gauge-based analysis of daily precipitation over East Asia, J. Hydrometeorol., 8, 607. 626.

  • (Gauge Algorithm Evaluation) Chen_et_al_2008_JGR_Gauge_Algo.pdf Chen, M., W. Shi, P. Xie, V. B. S. Silva, V E. Kousky, R. Wayne Higgins, and J. E. Janowiak (2008), Assessing objective techniques for gauge-based analyses of global daily precipitation, J. Geophys. Res., 113, D04110, doi:10.1029/2007JD009132

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection('NOAA/CPC/Precipitation')
                  .filter(ee.Filter.date('2018-01-01', '2019-01-01'));
var precipitation = dataset.select('precipitation');
var precipitationVis = {
  min: 0,
  max: 150,
  palette: ['#ADD8E6', '#008000', '#FFFF00', '#FFA500', '#FF0000', '#800080'],
};
Map.setCenter(-68.36, -6.73, 3);
Map.addLayer(precipitation, precipitationVis, 'NOAA CPC Precipitation');
Open in Code Editor
The CPC Unified Gauge-Based Analysis of Global Daily Precipitation dataset offers daily precipitation estimates over land from 1979 to the present. Developed by NOAA's Climate Prediction Center (CPC), it leverages an optimal interpolation technique to combine data from a global network of rain gauges, with over 30,000 gauges contributing to …
NOAA/CPC/Precipitation, daily,noaa,precipitation,weather
2006-01-01T00:00:00Z/2024-12-17T00:00:00Z
Google Earth Engine