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Articles by Vincent Hare
Oxygen atoms in 15‑million‑year‑old giant eggshells reveal how plants reacted to a hotter Earth
The modern-day Namib desert has been arid for at least 15 million years, when the extinct relatives of ostriches laid their eggs, which are like time capsules of ancient air. Credit: JP Koch/Red Dune Safaris Some periods in Earth's history are so different from our own that they may as well belong to another planet.
Oxygen atoms in 15-million-year-old giant eggshells reveal how plants reacted to a hotter Earth – study
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Oxygen atoms in 15‑million‑year‑old giant eggshells reveal how plants reacted to a hotter Earth – study
Some periods in Earth history are so different from our own that they may as well belong to another planet. Many people are interested in the age of dinosaurs, or the Ice Ages, but it is an intermediate world, the Miocene Epoch – a sort of “in-between” world, geologically speaking: less recent than mammoths and stone tools, but not the deep past of dinosaurs – that many scientists find interesting. By the start of the Miocene, the dinosaurs had been dead for 40 million years.
Africa: Why Africa's Young Scientists Should Help Check the Quality of Climate Change Research Original
Scientific research is essential for addressing the climate crisis. The Intergovernmental Panel on Climate Change (IPCC), a United Nations body, assesses the science on climate change through its regular assessment reports. These reports reflect scientific consensus on the causes and impacts of and possible solutions to climate change. The reports are not only scientific publications. They inform environmental policy at global, regional and country level relating to and the state of the environment.
Why Africa’s young scientists should help check the quality of climate change research
Scientific research is essential for addressing the climate crisis. The Intergovernmental Panel on Climate Change (IPCC), a United Nations body, assesses the science on climate change through its regular assessment reports. These reports reflect scientific consensus on the causes and impacts of and possible solutions to climate change. The reports are not only scientific publications. They inform environmental policy at global, regional and country level relating to and the state of the environment.
New archeomagnetic directional records from Iron-Age southern Africa (ca. 425-1550 CE) and implications for the South Atlantic Anomaly
The paucity of Southern Hemisphere archaeomagnetic data limits the resolution of paleosecular variation models. At the same time, important changes in the modern and historical field, including the recent dipole decay, appear to originate in this region. Here, a new directional record from southern Africa is presented from analysis of Iron Age (ca. 425-1550 CE) archaeological materials, which extends the regional secular variation curve back to the first millennium.
Atmospheric CO2 effect on stable carbon isotope composition of terrestrial fossil archives - Nature Communications
Abstract The 13C/12C ratio of C3 plant matter is thought to be controlled by the isotopic composition of atmospheric CO2 and stomatal response to environmental conditions, particularly mean annual precipitation (MAP). The effect of CO2 concentration on 13C/12C ratios is currently debated, yet crucial to reconstructing ancient environments and quantifying the carbon cycle. Here we compare high-resolution ice core measurements of atmospheric CO2 with fossil plant and faunal isotope records.
Polarity puzzle: is the earth's magnetic field reversing?
In the past, south was north and north was south - but now there are reports that patches of the earth's magnetic field deep under the earth's crust are weakening and even reversing. The Earth is blanketed by a magnetic field. It’s what makes compasses point north, and protects our atmosphere from continual bombardment from space by charged particles such as protons.
Earth's poles could be headed for the first reversal in 780,000 years
THE EARTH IS BLANKETED by a magnetic field. It’s what makes compasses point north, and protects our atmosphere from continual bombardment from space by charged particles such as protons. Without a magnetic field, our atmosphere would slowly be stripped away by harmful radiation, and life would almost certainly not exist as it does today. You might imagine the magnetic field is a timeless, constant aspect of life on Earth, and to some extent you would be right.
A pole reversal: Scientists discuss an anomaly in the Earth’s magnetic field
You might imagine the magnetic field is a timeless, constant aspect of life on Earth, and to some extent you would be right. But Earth’s magnetic field actually does change. Every so often – on the order of several hundred thousand years or so – the magnetic field has flipped. North has pointed south, and vice versa. And when the field flips it also tends to become very weak.
Does an anomaly in the Earth's magnetic field portend a coming pole reversal?
The Earth is blanketed by a magnetic field. It’s what makes compasses point north, and protects our atmosphere from continual bombardment from space by charged particles such as protons. Without a magnetic field, our atmosphere would slowly be stripped away by harmful radiation, and life would almost certainly not exist as it does today. You might imagine the magnetic field is a timeless, constant aspect of life on Earth, and to some extent you would be right.
Does an Anomaly in the Earth's Magnetic Field Portend a Coming Pole Reversal?
The Earth is blanketed by a magnetic field. It’s what makes compasses point north, and protects our atmosphere from continual bombardment from space by charged particles such as protons. Without a magnetic field, our atmosphere would slowly be stripped away by harmful radiation, and life would almost certainly not exist as it does today. You might imagine that the magnetic field is a timeless, constant aspect of life on Earth, and to some extent you would be right.
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