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The geologic temperature record are changes in Earth's environment as determined from geologic evidence on multi-million to billion (10 9) year time scales. The study of past temperatures provides an important paleoenvironmental insight because it is a component of the climate and oceanography of the time.
The Direct Quantitative Measurements method is the most direct approach to understand the change in a climate. Comparisons between recent data to older data allows a researcher to gain a basic understanding of weather and climate changes within an area. There is a disadvantage to this method.
In an early attempt to show that climate had changed, Hubert Lamb's 1965 paper generalised from temperature records of central England together with historical, botanical, and archeological evidence to produce a qualitative estimate of temperatures in the North Atlantic region. Subsequent quantitative reconstructions used statistical techniques ...
500 million years of climate change Ice core data for the past 400,000 years, with the present at right. Note length of glacial cycles averages ~100,000 years. Blue curve is temperature, green curve is CO 2, and red curve is windblown glacial dust (loess). Scale: Millions of years before present, earlier dates approximate.
Reconstructions of global temperature of the past 2000 years, using composite of different proxy methods. In the study of past climates ("paleoclimatology"), climate proxies are preserved physical characteristics of the past that stand in for direct meteorological measurements [1] and enable scientists to reconstruct the climatic conditions over a longer fraction of the Earth's history.
A team of scientists led by researchers from the University of Colorado Boulder turned up the 52-million-year-old fossil Tiny hedgehog fossil could answer climate-change questions Skip to main content
The Austrian locality of Stetten had a mean winter temperature of 9.6–13.3 °C and a mean summer temperature of 24.7–27.9 °C, contrasting with −1.4 °C and 19.9 °C respectively in the present; precipitation amounts at this site were 9–24 mm in winter and 204–236 mm in summer. [15]
As with all life forms, elephants have evolved over time from ungulates to near ungulates or subungulates as they are called today. Their unusually shaped feet are quite similar to that of ...