M (2026) Ensemble future climate daily data for Vellar river basin

Identification

• Journal: Mendeley Data
• Year: 2026
• Date: 2026-01-02
• Authors: Sivasakthi M
• DOI: 10.17632/dm82fdf5nj.1

Research Groups

• Annamalai University Faculty of Agriculture

Short Summary

This dataset provides bias-corrected and downscaled historical (1951–2024) and future daily climate projections for the Vellar river basin, derived from CMIP6 GCMs under multiple SSP scenarios, to support regional climate change impact assessments and hydrological studies.

Objective

• To generate a comprehensive, bias-corrected, and downscaled daily climate dataset (precipitation, minimum temperature, maximum temperature, and reference evapotranspiration) for the Vellar river basin to facilitate climate change impact assessments, hydrological studies, agro-climatological applications, water resource planning, drought analysis, crop water requirement estimation, and climate vulnerability assessments.

Study Configuration

• Spatial Scale: Vellar river basin
• Temporal Scale: Daily; historical period (1951–2024) and future projections (no specific end date, but beyond 2024).

Methodology and Data

• Models used: Coupled Model Intercomparison Project Phase 6 (CMIP6) General Circulation Models (GCMs); Hargreaves–Samani method (for reference evapotranspiration estimation).
• Data sources: Observed or reanalysis-based records (for historical data); CMIP6 GCMs under Shared Socioeconomic Pathway (SSP) scenarios (SSP1-2.6, SSP2-4.5, SSP5-8.5) (for future projections). Precipitation and temperature datasets underwent bias correction and downscaling.

Main Results

• A comprehensive daily climate dataset was developed for the Vellar river basin, including precipitation, minimum temperature, maximum temperature, and reference evapotranspiration.
• The dataset covers a historical baseline period from 1951 to 2024, utilizing observed or reanalysis-based records.
• Future climate projections are provided, derived from CMIP6 GCMs under SSP1-2.6, SSP2-4.5, and SSP5-8.5 scenarios.
• Precipitation and temperature data were bias-corrected and downscaled to enhance regional applicability.
• Reference evapotranspiration was estimated using the Hargreaves–Samani method.
• All variables are provided at a daily temporal resolution and organized into structured folders in .XLSX format.

Contributions

• Provides a unique, regionally specific, bias-corrected, and downscaled daily climate dataset for the Vellar river basin, which is crucial for local-scale climate change impact assessments, water resource management, and agricultural planning.
• Offers a valuable resource for researchers and policymakers to conduct detailed analyses of climate vulnerability, drought, and crop water requirements in the region using state-of-the-art CMIP6 projections and SSP scenarios.

Funding

• Not specified in the provided text.

Citation

@article{M2026Ensemble,
  author = {M, Sivasakthi},
  title = {Ensemble future climate daily data for Vellar river basin},
  journal = {Mendeley Data},
  year = {2026},
  doi = {10.17632/dm82fdf5nj.1},
  url = {https://doi.org/10.17632/dm82fdf5nj.1}
}