ISLSCP II: Gauge-Based Daily Precipitation over Global Land Areas

A long-term dataset provides daily precipitation measurements interpolated onto half-degree and one-degree latitude/longitude grids covering global land areas. The data is constructed from station observations sourced from the Global Telecommunications System (GTS) and processed using the Shepard (1968) interpolation algorithm. It consists of 6 data files, facilitating analysis of precipitation patterns and trends.

Use Cases

• Validating climate model precipitation outputs against gauge-based historical observations.
• Analyzing long-term trends and variability in daily rainfall over specific global regions.
• Studying extreme precipitation events and their spatial distribution across continents.
• Providing a baseline gridded precipitation product for hydrological modeling and water resource assessment.

Strengths

• Provides global spatial coverage over all land areas, enabling continental-scale analysis.
• Uses a documented and widely cited interpolation method (Shepard, 1968) for spatial consistency.
• Dataset is hosted on multiple authoritative platforms (Data.gov, NASA Earthdata), indicating established use.

Limitations

• Critical metadata is sparse or conflicting: row/record counts and exact file sizes are unknown, and last-update dates conflict between 1995 and 2026.
• The specific temporal coverage (start and end years) of the daily precipitation record is not explicitly stated in the provided input.
• Column names and detailed data structure are not provided, limiting immediate understanding of the data's internal organization.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Interpolation of station observations from the Global Telecommunications System (GTS) gauge network using the Shepard (1968) algorithm.

Freshness

2026-04-10 02:05:12.447864

Geography

Global land areas