Statistical analysis of the connection between geomagnetic field reversal, a supernova, and climate change during the Plio–Pleistocene transition

Orgeira, María Julia; Herrera, Víctor Manuel Velasco; Cappellotto, Luiggina; Compagnucci, Rosa Hilda

doi:10.1007/s00531-022-02184-3

Cited by 4 publications

(5 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These effects are unlikely to cause a mass extinction on Earth-the distance in Equation 7 is well beyond the ∼10-pc "kill radius" (Section 2)-but the stress to the biosphere may threaten the most vulnerable biota. While the visible light and ozone effects of the SN are small (47,165), the cosmic-ray effects can be significant. The level of the cosmic-ray flux increase depends on the magnetic fields between Earth and the SN, which act to steer the charged particles.…”

Section: Impact On the Heliosphere And Biospherementioning

confidence: 99%

“…For plausible cases in which the fields in the Local Bubble are weak due to prior SN explosion, teraelectronvolt to petaelectronvolt cosmic rays can be enhanced by two orders of magnitude, leading to a muon flux increase by a factor of ∼150 for many thousands of years (166). These have numerous effects (47), including a sharp rise in atmospheric ionization, increases in cancer and mutation rates, and possible climate forcing (21,165).…”

Section: Impact On the Heliosphere And Biospherementioning

confidence: 99%

See 1 more Smart Citation

Deep-Sea and Lunar Radioisotopes from Nearby Astrophysical Explosions

Fields,

Wallner

2023

Annu. Rev. Nucl. Part. Sci.

View full text Add to dashboard Cite

Live (not decayed) radioisotopes on the Earth and Moon are messengers from recent nearby astrophysical explosions. Measurements of 60Fe in deep-sea samples, Antarctic snow, and lunar regolith reveal two pulses about 3 Myr and 7 Myr ago. Detection of 244Pu in a deep-sea crust indicates a recent r-process event. We review the ultrasensitive accelerator mass spectrometry techniques that enable these findings. We then explore the implications for astrophysics, including supernova nucleosynthesis, particularly the r-process, as well as supernova dust production and the formation of the Local Bubble that envelops the Solar System. The implications go beyond nuclear physics and astrophysics to include studies of heliophysics, astrobiology, geology, and evolutionary biology.

show abstract

Section: Impact On the Heliosphere And Biospherementioning

confidence: 99%

Section: Impact On the Heliosphere And Biospherementioning

confidence: 99%

Deep-Sea and Lunar Radioisotopes from Nearby Astrophysical Explosions

Fields,

Wallner

2023

Annu. Rev. Nucl. Part. Sci.

View full text Add to dashboard Cite

show abstract

“…9 he showed us how strongly cosmic ray intensity and global temperature are correlated following an analysis of Shaviv and Veizer [81]). Just recently, Orgueira et al [82] have tested with a statistical analysis the hypothesis that an increase of cosmic rays due to SN activity, in addition to a lowering of the geomagnetic field intensity, could have led to the global cooling about 2.5 Myr ago, just at the Pliocene-Pleistocene boundary. They find such a scenario quite probable.…”

Section: Cosmic Raysmentioning

confidence: 99%

Recent nucleosynthesis in the solar neighbourhood, detected with live radionuclides

Korschinek

2023

Eur. Phys. J. A

View full text Add to dashboard Cite

In this article we try to summarize all information, gathered in the last three decades, on short-lived (order of Myr) radionuclides found in the Solar System with interstellar origin, most probably due to stellar processes like supernovae. The most important isotope is $$^{60}$$ 60 Fe, but we discuss also information on $$^{26}$$ 26 Al, $$^{244}$$ 244 Pu and $$^{53}$$ 53 Mn. We describe the environment of the Solar System during the past $$\approx 10$$ ≈ 10 Myr as well as the likely locations where the supernovae occured. Confirming evidence has been found in the composition and energy distribution of galactic cosmic rays. Finally, we discuss the effects that the recent supernova activity might have had on Earth’s climate and biosphere.

show abstract

“…Adhémar [2] described the long periodicities associated with glacial and interglacial cycles that were explained sixty years later by the mathematical theory of climate due to Milankovic [3]. A geometrical derivation shows that the insolation W received at a location with coordinates ϕ (latitude) and ψ (longitude) is given by the (fundamental, yet simple) equation (Equation (20), p. 15, [3]):…”

Section: Introductionmentioning

confidence: 99%

“…These perturbations affect solar activity, therefore sunspots [15], as well as the rotation axis [16], and therefore Earth's climate. This could explain the links between geomagnetism and climate (e.g., [20,21]).…”

Section: Introductionmentioning

confidence: 99%

Extending the Range of Milankovic Cycles and Resulting Global Temperature Variations to Shorter Periods (1–100 Year Range)

et al. 2022

View full text Add to dashboard Cite

The Earth’s revolution is modified by changes in inclination of its rotation axis. Its trajectory is not closed and the equinoxes drift. Changes in polar motion and revolution are coupled through the Liouville–Euler equations. Milanković (1920) argued that the shortest precession period of solstices is 20,700 years: the summer solstice in one hemisphere takes place alternately every 11,000 year at perihelion and at aphelion. Milanković assumed that the planetary distances to the Sun and the solar ephemerids are constant. There are now observations that allow one to drop these assumptions. We have submitted the time series for the Earth’s pole of rotation, global mean surface temperature and ephemeris to iterative Singular Spectrum Analysis. iSSA extracts from each a trend a 1 year and a 60 year component. Both the apparent drift of solstices of Earth around the Sun and the global mean temperature exhibit a strong 60 year oscillation. We monitor the precession of the Earth’s elliptical orbit using the positions of the solstices as a function of Sun–Earth distance. The “fixed dates” of solstices actually drift. Comparing the time evolution of the winter and summer solstices positions of the rotation pole and the first iSSA component (trend) of the temperature allows one to recognize some common features. A basic equation from Milankovic links the derivative of heat received at a given location on Earth to solar insolation, known functions of the location coordinates, solar declination and hour angle, with an inverse square dependence on the Sun–Earth distance. We have translated the drift of solstices as a function of distance to the Sun into the geometrical insolation theory of Milanković. Shifting the inverse square of the 60 year iSSA drift of solstices by 15 years with respect to the first derivative of the 60 year iSSA trend of temperature, that is exactly a quadrature in time, puts the two curves in quasi-exact superimposition. The probability of a chance coincidence appears very low. Correlation does not imply causality when there is no accompanying model. Here, Milankovic’s equation can be considered as a model that is widely accepted. This paper identifies a case of agreement between observations and a mathematical formulation, a case in which an element of global surface temperature could be caused by changes in the Earth’s rotation axis. It extends the range of Milankovic cycles and resulting global temperature variations to shorter periods (1–100 year range), with a major role for the 60-year oscillation).

show abstract

Statistical analysis of the connection between geomagnetic field reversal, a supernova, and climate change during the Plio–Pleistocene transition

Cited by 4 publications

References 50 publications

Deep-Sea and Lunar Radioisotopes from Nearby Astrophysical Explosions

Deep-Sea and Lunar Radioisotopes from Nearby Astrophysical Explosions

Recent nucleosynthesis in the solar neighbourhood, detected with live radionuclides

Extending the Range of Milankovic Cycles and Resulting Global Temperature Variations to Shorter Periods (1–100 Year Range)

Contact Info

Product

Resources

About