Present and future Köppen-Geiger climate classification maps at 1-km resolution

Area of Science:

• Climatology
• Geography
• Environmental Science

Background:

• Köppen-Geiger climate classification is a vital tool for understanding global climate patterns.
• Previous climate maps lacked the resolution and detail necessary for precise ecological applications.
• Climate change necessitates updated climate classifications to reflect shifting global conditions.

Purpose of the Study:

• To create high-resolution (1-km) global Köppen-Geiger climate classification maps for the present-day and future climate change scenarios.
• To provide confidence levels for map classifications, indicating reliability.
• To offer a valuable resource for ecological and vegetation distribution modeling.

Main Methods:

• Utilized an ensemble of four high-resolution, topographically-corrected climatic maps for the present-day baseline.
• Developed future climate maps by overlaying climate change anomalies from 32 climate model projections (RCP8.5) onto baseline maps.
• Calculated ensemble spread to determine confidence levels for all classifications.

Main Results:

• Generated global Köppen-Geiger climate maps at an unprecedented 1-km resolution for both present-day (1980-2016) and future (2071-2100) periods.
• Achieved higher classification accuracy and significantly more spatial detail compared to previous maps, especially in areas with steep gradients.
• Produced associated confidence maps to quantify the reliability of the climate classifications.

Conclusions:

• The new high-resolution Köppen-Geiger maps provide a significant advancement in climate classification detail and accuracy.
• These maps are expected to be instrumental for various applications, particularly in species and vegetation distribution modeling.
• The maps and confidence data are publicly accessible for research and practical use.