A Global High-Resolution Precipitation Climate Record: PERSIANN-CCS-CDR Version 2.0.

Area of Science:

• Earth Science
• Climate Science
• Hydrology

Background:

• PERSIANN-CCS-CDR is a global precipitation dataset with 0.04° spatial and 3-hourly temporal resolution, initiated in 1983.
• Previous versions faced challenges with data reliability due to inconsistencies in input sources like GridSat-B1 and CPC-4km.

Purpose of the Study:

• Introduce PERSIANN-CCS-CDR V2.0, an improved global precipitation dataset.
• Address and mitigate data inconsistencies inherent in earlier versions.
• Provide guidance for effective utilization of the new dataset.

Main Methods:

• Developed PERSIANN-CCS-CDR V2.0 with two distinct sub-products: PERSIANN-CCS-CDR-B1 (using GridSat-B1) and PERSIANN-CCS-CDR-CPC (using CPC-4KM).
• Maintained the original 0.04° spatial and 3-hourly temporal resolution for both sub-products.
• Evaluated the performance and reliability of the new dataset version.

Main Results:

• PERSIANN-CCS-CDR V2.0 offers enhanced data reliability by resolving input inconsistencies.
• PERSIANN-CCS-CDR-B1 provides data from 1983, while PERSIANN-CCS-CDR-CPC offers data from March 2000.
• The new version demonstrates improved performance compared to its predecessor.

Conclusions:

• PERSIANN-CCS-CDR V2.0 represents a significant advancement in global precipitation data.
• The dual sub-product approach caters to different data availability needs and research objectives.
• This updated dataset is a valuable resource for climate research, hydrology, and meteorological studies.