Science News
New ice core studies expand histories of greenhouse gases and ocean temperature to 3 million years. The findings show the long-term cooling of Earth’s climate during this period has been accompanied by only a modest decline in heat-trapping greenhouse gases…
❄️ New Antarctic ice analyses extend Earth's climate records back 3 million years, revealing a modest decline in greenhouse gases alongside long-term cooling.
🌊 Researchers used noble gas ratios in ancient ice to show ocean temperatures have declined by 2-2.5°C over the past 3 million years, with deep ocean cooling happening earlier than surface cooling.
💨 The studies provide the first direct records of carbon dioxide and methane levels for the last 3 million years, showing CO2 averaged below 300 ppm and methane remained unchanged at 500 ppb.
#ClimateChange #Paleoclimate #Antarctica
🌊 Researchers used noble gas ratios in ancient ice to show ocean temperatures have declined by 2-2.5°C over the past 3 million years, with deep ocean cooling happening earlier than surface cooling.
💨 The studies provide the first direct records of carbon dioxide and methane levels for the last 3 million years, showing CO2 averaged below 300 ppm and methane remained unchanged at 500 ppb.
#ClimateChange #Paleoclimate #Antarctica
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Earth's Past Temperatures Cooler Than Thought
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#ClimateHistory #PaleoClimate #EarthScience
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#ClimateHistory #PaleoClimate #EarthScience
www.leeds.ac.uk
Understanding Earth’s past temperatures
The Earth’s temperature has been much cooler in the past than previously thought, meaning it could be moving towards the warmest it’s ever been.
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