The Anthropogenic Greenhouse Era Began Thousands of Years Ago

  title={The Anthropogenic Greenhouse Era Began Thousands of Years Ago},
  author={W. Ruddiman},
  journal={Climatic Change},
  • W. Ruddiman
  • Published 2003
  • Geology
  • Climatic Change
  • The anthropogenic era is generally thought to have begun 150 to 200 years ago, when the industrial revolution began producing CO2 andCH4 at rates sufficient to alter their compositions in the atmosphere. A different hypothesis is posed here: anthropogenic emissions of these gases first altered atmospheric concentrations thousands of years ago. This hypothesis is based on three arguments. (1) Cyclic variations in CO2 andCH4 driven by Earth-orbital changes during the last 350,000 years predict… CONTINUE READING

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    Publications referenced by this paper.
    Causes of climate change over the past 1000 years
    • Crowley
    • Environmental Science, Medicine
    • 2000
    • 1,818
    • PDF
    The case for human causes of increased atmospheric CH4 over the last 5000 years
    • 124
    Modeling the Climatic Response to Orbital Variations
    • 860
    • Highly Influential
    • PDF
    Variations in atmospheric methane concentration during the Holocene epoch
    • 338
    • Highly Influential
    Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica
    • 5,506
    • PDF
    Rapid Variations in Atmospheric Methane Concentration During the Past 110,000 Years
    • 318
    Variations in the Earth's Orbit: Pacemaker of the Ice Ages
    • 3,079
    • PDF