Climate models provide scenarios of what the world might look like in the future.And the research
By understanding how latitudinal temperature gradients have changed throughout Earth's history and under different climate regimes, we can better anticipate what will happenin the future.
Emily Judd, Researcher, Department of Earth and Environmental Sciences
To determine ancient temperatures, geologists study the chemical or biological traces that recordtemperature from sedimentary sediments preserved on the seabed or continents.
Due to the reuse of the ancient marinethe bottom in the Earth's mantle, there is a so-called shelf life, it determines how long this data can be stored. Thus, the most ancient temperature indicators come from deposits that have accumulated on the outskirts of continents or in shallow inland seas, where records can last much longer.
Data from shallow, partially enclosed seas (eg Mediterranean and Baltic seas) show that sea surface temperatures are higher than open ocean temperatures.
As a result, the main conclusion of the article is that the average temperature in the Paleozoic era (~ 540–250 million yearsback) was unrealistically high.
According to Judd, the paleoclimate community has made significant advances in understanding ancient climate over the past few decades.New, faster and cheaper analytical methods, as well as an increase in the number of expeditions that extractcores of oceanic sediments, provided an array of information about the climate of the ancient seas.
Despite these advances, there are still significant discrepancies between temperature estimates from different locations within the same time interval and / or between temperatures.
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