GPCPDAY: Global Daily Precipitation Estimates at 0.5-Degree Resolution

June 2000 to December 2020 of daily global precipitation estimates at a 0.5-degree grid resolution. The dataset is produced by NASA's Global Precipitation Climatology Project (GPCP) using a merger of satellite data from GPM IMERG and TOVS/AIRS estimates. It provides a long, homogeneous precipitation record and includes probability of liquid phase estimates globally.

Use Cases

• Modeling global water and energy cycles based on the satellite-based precipitation component.
• Analyzing long-term, homogeneous precipitation trends based on the 20-year daily record.
• Studying precipitation phase (liquid vs. solid) based on the provided probability of liquid phase estimates.
• Validating regional climate models based on the 0.5-degree gridded daily precipitation fields.

Strengths

• Daily temporal resolution spanning over 20 years (June 2000-December 2020).
• Global spatial coverage at a 0.5-degree grid resolution.
• Internally consistent product suite designed for homogeneity.
• Includes probability of liquid phase estimates in addition to precipitation totals.

Limitations

• Version 3.2 has been superseded by Version 3.3.
• Row count and dataset size are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

National Aeronautics and Space Administration (NASA) via the Global Precipitation Climatology Project (GPCP).

Collection Method

Satellite data merging technique using GPM IMERG (55°N-S) and TOVS/AIRS estimates (outside 55°N-S), scaled to monthly values.

Time Range

June 2000 to December 2020

Freshness

Last updated 2026-03-13 02:30:02.404873; freshness should be verified.

Geography

Global