Improved computer models reveal how astronomical forces drove the glacial cycle 1.6-1.2 million years ago, offering insight into the past, present, and future of climate change.
A research team made up of climatologists and an astronomer has made substantial advancements in our understanding of the Earth's climate and the mechanisms underlying the glacial-interglacial cycle., concentrating on the glacial period between 1.6 and 1.2 million years ago, using an updated computer model., shed light on the important role that astronomical forces played during the period. They also offer important new information on the future of the Earth's climate.
The research team, led by Yasuto Watanabe at the University of Tokyo, employed an updated climate computer model that included cutting-edge astronomical ideas to focus on the early Pleistocene Epoch between 1.6 and 1.2 million years ago.The scientists successfully recreated the 40,000-year glacial cycle of that epoch using intensive numerical simulations, closely agreeing with geological records.
The position of the summer solstice in Earth's orbit, which coincided with perihelion, also played a significant role in determining when deglaciation began. The length of the interglacial period was also dictated by variations in the orientation of the spin axis and the location of the summer solstice.
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