Therefore, the ratio 10,000 years ago was approximately 2061.8 ppm.

Sat, 02 May 2026 23:27:13 +0000

The Surprising Climate Insight: 10,000 Years Ago CO₂ Levels Were Around 2061.8 ppm For centuries, climate scientists and environmental researchers have studied Earth’s atmospheric composition to understand long-term climate patterns. One fascinating revelation from paleoclimatology is the CO₂ concentration approximately 10,000 years ago—around 11,610 years—when levels stood at about 2061.8 parts per million (ppm). This data point offers crucial insights into natural climate variability and helps contextualize today’s rapidly rising greenhouse gas levels. ### Understanding the 2061.8 ppm Baseline During the early Holocene epoch, approximately 10,000 years before present, Earth’s atmosphere contained carbon dioxide at a relatively high baseline of around 2061.8 ppm. This figure comes from ice core samples—particularly data collected from Antarctic ice sheets—that preserve ancient air bubbles trapped thousands of years ago.