scholarly journals Predominantly non-solar origin of nitrogen in lunar soils

2016 ◽  
Vol 193 ◽  
pp. 36-53 ◽  
Author(s):  
J. Mortimer ◽  
A.B. Verchovsky ◽  
M. Anand
Keyword(s):  
Solar Origin ◽  
Lunar Soils

Radio Observations of Two Large Solar Disturbances

1951 ◽  
Vol 4 (1) ◽  
pp. 51
Author(s):  
JV Hindman ◽  
AG Little ◽  
R Payne-Scott ◽  
DE Yabsley ◽  
CW Allen
Keyword(s):  
Radio Frequency ◽  
Solar Flares ◽  
Radio Frequency Power ◽  
Frequency Range ◽  
Power Flux ◽  
Apparent Position ◽  
Radio Receivers ◽  
Solar Origin ◽  
Solar Disturbances ◽  
Frequency Power

On February 17 and 21-22, 1950, two exceptionally large radio-frequency disturbances of solar origin were observed on seven radio receivers working in the frequency range from 62 to 9400 Mc/s. At each of the frequencies the radio-frequency power flux was recorded continuously during the disturbance and at several frequencies the polarization of the radiation was examined. The apparent position of the origin of the radiation was determined at one frequency. The time of commencement and the duration of the disturbances at the different frequencies were compared with each other and with those of associated phenomena, solar flares, radio fade-outs, and geomagnetic effects. The two disturbances show marked similarities and marked differences ; these are summarized.

scholarly journals Large Evaporite Provinces: Geothermal rather than Solar Origin?

2020 ◽  
Author(s):  
Zhanjie Qin ◽  
Chunan Tang ◽  
Xiying Zhang ◽  
Tiantian Chen ◽  
Xiangjun Liu ◽  
...  
Keyword(s):  
Large Scale ◽  
Climatic Factors ◽  
Temporal Distribution ◽  
Tectonic Activity ◽  
Driving Mechanism ◽  
Solar Origin ◽  
Tectonically Active ◽  
Spatio Temporal ◽  
Thermal Influence ◽  
The Masses

Abstract Large evaporite provinces (LEPs) represent prodigious volumes of evaporites widely developed from the Sinian to Neogene. The reasons why they often quickly develop on a large scale with large areas and thicknesses remain enigmatic. Possible causes range from warming from above to heating from below. The fact that the salt deposits in most salt-bearing basins occur mainly in the Sinian-Cambrian, Permian-Triassic, Jurassic-Cretaceous, and Miocene intervals favours a dominantly tectonic origin rather than a solar driving mechanism. Here, we analysed the spatio-temporal distribution of evaporites based on 138 evaporitic basins and found that throughout the Phanerozoiceon, LEPs occurred across the Earth’s surface in most salt-bearing basins, especially in areas with an evolutionary history of strong tectonic activity. The masses of evaporites, rates of evaporite formation, tectonic movements, and large igneous provinces (LIPs) synergistically developed in the Sinian-Cambrian, Permian, Jurassic-Cretaceous, and Miocene intervals, which are considered to be four of the warmest times since the Sinian. We realize that salt accumulation can proceed without solar energy and can generally be linked to geothermal changes in tectonically active zones. When climatic factors are involved, they may be manifestations of the thermal influence of the crust on the surface.

scholarly journals Multiradionuclide evidence for the solar origin of the cosmic-ray events of AD 774/5 and 993/4

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Florian Mekhaldi ◽  
Raimund Muscheler ◽  
Florian Adolphi ◽  
Ala Aldahan ◽  
Jürg Beer ◽  
...  
Keyword(s):  
Cosmic Ray ◽  
Solar Origin

scholarly journals Possible solar origin of the 1,470-year glacial climate cycle demonstrated in a coupled model

Nature ◽  
2005 ◽  
Vol 438 (7065) ◽  
pp. 208-211 ◽  
Author(s):  
Holger Braun ◽  
Marcus Christl ◽  
Stefan Rahmstorf ◽  
Andrey Ganopolski ◽  
Augusto Mangini ◽  
...  
Keyword(s):  
Coupled Model ◽  
Solar Origin ◽  
Climate Cycle ◽  
Glacial Climate

Atmospheric internal gravity waves as a source of quasiperiodic variations of the cosmic ray secondary component and their likely solar origin

Solar Physics ◽  
1983 ◽  
Vol 82 (1-2) ◽  
pp. 447-449
Author(s):  
A. M. Galper ◽  
V. G. Kirillov-Ugryumov ◽  
N. G. Leikov ◽  
B. I. Luchkov
Keyword(s):  
Gravity Waves ◽  
Cosmic Ray ◽  
Internal Gravity Waves ◽  
Secondary Component ◽  
Solar Origin

Cosmogenic and implanted radionuclides studied by selective etching of lunar soils

2000 ◽  
Vol 172 (1-4) ◽  
pp. 867-872 ◽  
Author(s):  
A.J.Timothy Jull ◽  
Devendra Lal ◽  
Lanny R. McHargue ◽  
George S. Burr ◽  
Douglas J. Donahue
Keyword(s):  
Selective Etching ◽  
Lunar Soils
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