new Scientific discovery It raised eyebrows: it was A scientific reseach The publication in the journal Science resolves a long-standing scientific debate and may completely change the way we think about climate evolution Land.
the investigation So is he Discovery Refutes the idea that surface Land (both land and sea) witnessed Temperatures Really high over the last 2 billion years. Rather, it indicates that Land Its climate was relatively stable and mild. the Temperature It is an important control of the chemical reactions that govern life and our environment.
“Knowledge Temperatures “The past could help us understand how Earth's climate system worked and provide insight into the conditions that allowed life to arise and evolve,” says University of Waikato geochemist Dr Terry Eason, lead author of the study.
to understand Temperatures The Past and the Evolution of Life is not an exercise in history or purely intellectual curiosity. the investigation About past climate is important for researchers seeking to understand current climate and long-term future scenarios.
“We cannot use our planet as a large-scale laboratory. Looking back provides a way to understand the processes that regulate Earth's climate.”
In this work, Dr. Eason, along with doctoral student Sofia Rosi, adopted new methods to shed light on the history of Earth's surface temperature.
They used five unique data records derived from different types of rocks, including shale, iron oxide, carbonate, silica and phosphate. Together, these “geochemical” records contain more than 30,000 data points covering a long history of… Land.
To date, this study is the most comprehensive collection and interpretation of one of the oldest geochemical records: oxygen isotopes. Oxygen isotopes are different forms of the element oxygen. It is also the first study to use the five existing records to draw a consistent “map” of temperature over a large period of geologic time.
“By combining oxygen isotope records from different minerals, we were able to reconcile a uniform temperature history on Earth that is consistent across all five records with the oxygen isotopic composition of seawater,” says Dr. Eason.
The study refutes ideas that the first oceans were warm with temperatures exceeding 60 degrees Celsius about 500 million years ago, that is, before the appearance of land animals and plants. The data indicate a Ocean Primordial life is relatively stable and temperate with temperatures around 10°C, disrupting current thinking about the environment in which complex life evolved.
This work produces the first record of the evolution and abundance of terrestrial (terrestrial) and marine clays throughout Earth's history. This is the first direct evidence of a close link between the evolution of plants, marine creatures that form silica skeletons and shells (siliceous life forms), clay formation and global climate.
“The results suggest that the clay formation process may have played a major role in regulating the world's climate Land Primitive and in maintaining the moderate conditions that allowed the development and spread of life in the world Landsays Dr. Eason.
Video: How scientific research is conducted
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