Predictions of future climate change require a clear and nuanced understanding of Earth’s past climate. In a study published today in Science Advances, University of Hawai’i (UH) at Manoa oceanographers fully reconciled climate and carbon cycle trends of the past 50 million years—solving a controversy debated in the scientific literature for decades. Contrary to expectations, the deep-sea carbonate records indicate that as atmospheric carbon dioxide (CO2) decreased over the past 50 million years, the global CCD deepened (not shoaled), creating a carbon cycle conundrum. https://phys.org/news/2021-01-climate-carbon-trends-million-years.html
