AIMERG: Asian Precipitation Data Calibrated from GPM IMERG and APHRODITE

AIMERG is a precipitation dataset for Asia with a spatial resolution of 0.1 degrees and a temporal resolution of half-hourly intervals. It was created by researchers including Ziqiang Ma from Peking University, calibrating GPM IMERG data using APHRODITE at a daily scale. The dataset covers the years 2000 to 2008 for the land area between 60°E-150°E and 15°S-55°N.

Use Cases

• Validate regional climate models based on high-resolution half-hourly precipitation data.
• Study extreme weather events in Asia based on the calibrated, land-focused spatial coverage.
• Improve hydrological forecasting based on the dataset's calibration between satellite and gauge data.
• Analyze long-term precipitation trends from 2000 to 2008 for the Asian continent.

Strengths

• Offers a high spatiotemporal resolution of 0.1 degrees and half-hourly intervals.
• Covers a nine-year time range from 2000 to 2008 for a consistent analysis period.
• Calibrates GPM IMERG satellite data using the APHRODITE gauge-based product, which likely improves accuracy.
• Has a defined spatial coverage for the Asian landmass (60°E-150°E, 15°S-55°N).

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• Last update date is unknown; freshness unverified.

Provenance

Source

Peking University (Author: Ziqiang Ma et al.)

Collection Method

Calibration of GPM IMERG (0.1°/half-hourly) satellite data using APHRODITE (0.25°/Daily) gauge-based data at a daily scale.

Time Range

2000-2008

Geography

Asia (60°E-150°E, 15°S-55°N, land)