Daily briefing: Ice core is the longest-ever continuous record of Earth's climate

"A 2.8-kilometre-deep ice core has yielded the longest continuous record of Earth's climate and atmospheric conditions, stretching back 1.2 million years. Data from the core show how the concentration of carbon dioxide in the atmosphere tracked changes in global temperatures across multiple cycles of climate change. The core covers a period in Earth's history during which ice ages became less frequent but more brutal."

"Researchers are hoping the oxygen isotopes and carbon dioxide in the core can provide some hints as to what caused the switch. Nature | 5 min read"

"The largest-ever survey of physicists found that experts (and physics fans) remain divided about some of the field's biggest questions. A poll of more than 1,500 readers of Physics Magazine and members of the American Physical Society revealed some surprising areas of disagreement. For example, there was "considerable skepticism over the standard model of cosmology" - called Λ cold dark matter (ΛCDM), in which cosmic history is largely the result of a struggle between the pull of dark matter and the push of dark energy."

A 2.8-kilometre-deep ice core provides the longest continuous record of Earth’s climate and atmospheric conditions, reaching back 1.2 million years. Measurements show that atmospheric carbon dioxide concentrations tracked changes in global temperatures across multiple climate-change cycles. The record covers a period when ice ages became less frequent but more severe. Researchers aim to use oxygen isotopes and carbon dioxide signals from the core to identify what drove the shift. A separate large survey of physicists finds persistent disagreement about major physics questions, including skepticism about the standard cosmology model ΛCDM, which attributes cosmic history to interactions between dark matter and dark energy.

Read at Nature