Radiocarbon and Astrophysical-Geophysical Phenomena

Kocharov, G. E.

doi:10.1007/978-1-4757-4249-7_10

Cited by 6 publications

(6 citation statements)

References 12 publications

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“…This amplitude differs significantly from the 4.8 ± 0.6 per mil found for Russian trees (Kocharov, 1992) for the AD 1600-1950 interval. Both records are compared in Figure 6.…”

Section: Introductioncontrasting

confidence: 75%

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Sun, ocean, climate and atmospheric 14CO2 : an evaluation of causal and spectral relationships

1993

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Solar (heliomagnetic), geomagnetic and oceanic forcing all play a role in atmospheric 14 CO 2 change. Here we assign the variance associated with certain periodicities in a single year (0-450 cal. BP) and a Holocene bidecadal (0-11400 cal. BP) 14 CO 2 record to specific forcing factors. In the single-year time series the variance in the 2-6-year periodicity range is attributable to El Niño-Southern Oscillation (ENSO) ocean perturbations. A 10-11-year component is partially tied to solar modulation of the cosmic ray flux, and multidecadal variability may relate to either solar modulation or instability of the North Atlantic thermohaline circulation. For the early Holocene bidecadal 14 C record we derive a 512-year atmospheric 14 C periodicity which relates to instabilities in North Atlantic thermohaline circulation. North Atlantic deep water formation increased near the start, instead of the termination, of the Younger Dryas interval. The ubiquitous 206-year 14 C cycle is assigned either to solar modulation, or to solar modulation modified by a climate (ocean) response. The latter modification is discussed as part of a hypothetical mechanism explaining postulated climate-14C relationships in which a minor solarinduced Maunder Minimum climate change is amplified by salinity effects on North Atlantic thermohaline circulation.

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“…This amplitude differs significantly from the 4.8 ± 0.6 per mil found for Russian trees (Kocharov, 1992) for the AD 1600-1950 interval. Both records are compared in Figure 6.…”

Section: Introductioncontrasting

confidence: 75%

“…Figure 5a, except both the Q and lOBe records were filtered with a 5-20-year split cosine band pass. Figure 6 Single-year 0&dquo;C records of the Pacific northwest (circles) and Russia (solid line - Kocharov, 1992). The standard deviations of the Pacific northwest and Russian measurements are, respectively, about 2%.…”

Section: Introductionmentioning

confidence: 98%

Sun, ocean, climate and atmospheric 14CO2 : an evaluation of causal and spectral relationships

1993

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“…Other explanations have been proposed (e.g. Kocharov 1992), but the precise synchronism between a pronounced geomagnetic low and an intense ∆ 14 C peak in the same sedimentary record (Voelker et al 1998) seems compelling. If the assumption that the 10 Be peak represents a production spike is correct, dating the Laschamp event effectively dates D-O event 10.…”

Section: Several Investigators Includingmentioning

confidence: 99%

A Radiocarbon Perspective on Greenland Ice-Core Chronologies: Can we Use Ice Cores for ¹⁴C Calibration?

Southon¹

2004

Radiocarbon

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Some of the most valuable paleoclimate archives yet recovered are the multi-proxy records from the Greenland GISP2 and GRIP ice cores. The crucial importance of these data arises in part from the strong correlations that exist between the Greenland δ18O records and isotopic or other proxies in numerous other Northern Hemisphere paleoclimate sequences. These correlations could, in principle, allow layer-counted ice-core chronologies to be transferred to radiocarbon-dated paleoclimate archives, thus providing a 14C calibration for the Last Glacial Maximum and Isotope Stage 3, back to the instrumental limits of the 14C technique. However, this possibility is confounded by the existence of numerous different chronologies, as opposed to a single (or even a “best”) ice-core time scale. This paper reviews how the various chronologies were developed, summarizes the differences between them, and examines ways in which further research may allow a 14C calibration to be established.

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“…At the moment, there is only one possibility to measure the total proton emission energy from the Sun on a long time scale. This possibility is connected with the highresolution measurements of the nitrate abundance in the polar ice (see and the radiocarbon abundance in the natural archives of cosmic rays: tree rings, corals, ice cores etc.It is known (see Kocharov, 1992, and references therein) that the radiocarbon abundance in tree rings is an indicator of galactic cosmic ray intensity in the Solar system. High precision year by year measurements of the radiocarbon abundance in tree rings reveal clearly the 11 year cycle for the last several hundreds of years.…”

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confidence: 99%

“…It is known (see Kocharov, 1992, and references therein) that the radiocarbon abundance in tree rings is an indicator of galactic cosmic ray intensity in the Solar system. High precision year by year measurements of the radiocarbon abundance in tree rings reveal clearly the 11 year cycle for the last several hundreds of years.…”

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confidence: 99%

On the Integrated Investigations of the Astrophysical Atmospheric and Geophysical Phenomena.

Gladysheva

Kocharov

1996

J. geomagn. geoelec

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The purpose ofthis paper is to stress the importance of collaborative research using natural archives of the cosmogenic nuclei and of the nitrates generated in the Earth's atmosphere.Cosmogenic isotopes (14C, 10Be, 36C1 etc.) are produced in cosmic rays and gamma-ray nuclear interactions with the Earth's atmosphere. After their generation, cosmogenic isotopes participate in atmospheric processes, to finally enter the natural archives, such as tree rings, corals, polar ice cores, sea bottom sediments. In their memory, the cosmogenic isotopes retain information on the origin and propagation of cosmic rays in interstellar medium, in the geomagnetic field, and the Earth's atmosphere. Atomic collisions between the cosmic radiation and atmospheric atoms produce many electrons. As a result, the nitrates are generated. The Antarctic and Greenland act as cold traps capable to freezing the incoming signals and thus keeping them in memory.By measuring the abundance of cosmogenic isotopes and nitrates in dated natural archives, one can solve a number of astrophysical, geophysical and atmospheric problems. The available time interval is large, several hundredthousands ofyears. To ensure efficient use ofthese unique possibilities, cooperation between astrophysical, atmospheric and geophysical communities is necessary.We are dealing here primarily with the astrophysical and terrestrial phenomena which are at the focus of scientific attention, namely, the upper limit of total energy of solar flare-accelerated particles and the problem of the Tungus phenomenon.The solar magnetic field is considered presently as the only energy source of solar cosmic rays. First of all, because we have no other candidate; second, the measured solar magnetic field can, in principle, provide the energy necessary for the solar flares. Progress in experimental possibilities of determining the main characteristics of particles accelerated in a flare region reveals increasing difficulties of explaining the fatality of available data within one concept that the photospheric magnetic field is the only source of all particles and radiations emitted in a solar flare. On the other hand, the magnetic field is of limited strength, and so the total energy of the accelerated particles should have an upper limit. The point is how to measure it.Available experimental data show that the higher is the total energy of solar cosmic rays, the lower is the probability of their observation. Therefore, to get the maximum value, we need to perform measurements over a long time scale. At the moment, there is only one possibility to measure the total proton emission energy from the Sun on a long time scale. This possibility is connected with the highresolution measurements of the nitrate abundance in the polar ice (see and the radiocarbon abundance in the natural archives of cosmic rays: tree rings, corals, ice cores etc.It is known (see Kocharov, 1992, and references therein) that the radiocarbon abundance in tree rings is an indicator of galactic cosmic ray intensity in ...

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Radiocarbon and Astrophysical-Geophysical Phenomena

Cited by 6 publications

References 12 publications

Sun, ocean, climate and atmospheric 14CO2 : an evaluation of causal and spectral relationships

Sun, ocean, climate and atmospheric 14CO2 : an evaluation of causal and spectral relationships

A Radiocarbon Perspective on Greenland Ice-Core Chronologies: Can we Use Ice Cores for ¹⁴C Calibration?

On the Integrated Investigations of the Astrophysical Atmospheric and Geophysical Phenomena.

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Radiocarbon and Astrophysical-Geophysical Phenomena

Cited by 6 publications

References 12 publications

Sun, ocean, climate and atmospheric 14CO2 : an evaluation of causal and spectral relationships

Sun, ocean, climate and atmospheric 14CO2 : an evaluation of causal and spectral relationships

A Radiocarbon Perspective on Greenland Ice-Core Chronologies: Can we Use Ice Cores for 14C Calibration?

On the Integrated Investigations of the Astrophysical Atmospheric and Geophysical Phenomena.

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A Radiocarbon Perspective on Greenland Ice-Core Chronologies: Can we Use Ice Cores for ¹⁴C Calibration?