PaleoClim, high spatial resolution paleoclimate surfaces for global land areas

Area of Science:

• Paleoclimatology
• Climate Modeling
• Biodiversity Research

Background:

• High-resolution paleoclimate data are crucial for understanding environmental, evolutionary, and ecological dynamics.
• Previous bioclimatic data primarily covered the Late Pleistocene and Holocene, limiting studies on earlier periods.
• Early Pleistocene and Pliocene epochs are critical for understanding speciation events, yet lack accessible climate data.

Purpose of the Study:

• To present PaleoClim, a novel, free database of downscaled paleoclimate data.
• To provide user-friendly climatic descriptors for the Early Pleistocene and Pliocene.
• To support integrative studies on species' responses to past climate change.

Main Methods:

• Utilized snapshot-style climate model simulations from HadCM3 (UK Met Office Hadley Centre General Circulation Model).
• Downscaled paleoclimate outputs to a 2.5-minute resolution (~5 km at equator).
• Included surface temperature and precipitation estimates.

Main Results:

• The database contains paleoclimate data for three key time periods: Marine Isotope Stage 19 (MIS19) in the Pleistocene (~787 ka), the mid-Pliocene Warm Period (~3.264–3.025 Ma), and MIS M2 in the Late Pliocene (~3.3 Ma).
• Data spans from 3.3 to 0.787 million years ago.
• Provides essential temperature and precipitation data.

Conclusions:

• PaleoClim significantly enhances the availability of critical paleoclimate data for understudied Early Pleistocene and Pliocene periods.
• The database facilitates research into species' evolutionary and ecological responses to climate change during crucial speciation periods.
• Accessible, high-resolution paleoclimate data are vital for advancing environmental and evolutionary sciences.