Anomalous and Galactic Cosmic Rays at 1 AU During the Cycle 23/24 Solar Minimum

@article{Leske2013AnomalousAG,
  title={Anomalous and Galactic Cosmic Rays at 1 AU During the Cycle 23/24 Solar Minimum},
  author={R. A. Leske and Alan C. Cummings and Richard A. Mewaldt and Edward C. Stone},
  journal={Space Science Reviews},
  year={2013},
  volume={176},
  pages={253-263}
}
Anomalous cosmic ray (ACR) intensities at 1 AU at solar minimum generally track galactic cosmic ray (GCR) intensities such as those measured by neutron monitors, albeit with differences between solar polarity cycles. The unusual cycle 23/24 solar minimum was long-lasting with very low sunspot numbers and significantly reduced interplanetary magnetic field strength and solar wind dynamic pressure and turbulence, but also featured a heliospheric current sheet tilt that remained high for an… 
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References

SHOWING 1-10 OF 29 REFERENCES
Unusual time histories of galactic and anomalous cosmic rays at 1 AU over the deep solar minimum of cycle 23/24
[1] The unusually quiet Sun of the cycle 23/24 solar minimum (that ended in December, 2009) has resulted in lower values of the interplanetary magnetic field and a slower approach of the tilt angle
RECORD-SETTING COSMIC-RAY INTENSITIES IN 2009 AND 2010
We report measurements of record-setting intensities of cosmic-ray nuclei from C to Fe, made with the Cosmic Ray Isotope Spectrometer carried on the Advanced Composition Explorer in orbit about the
Long‐term neutron monitor observations and the 2009 cosmic ray maximum
[1] The solar minimum of 2009 was characterized by a prolonged increase toward the maximum cosmic ray intensity, which was higher than it was during the maxima of 22 and 44 years ago. In the previous
Status Of Galactic Cosmic Ray Recovery From Sunspot Cycle 23 Modulation
Sunspot cycle 23 is turning out to be longer than cycle 20. Magnetic field measurements at Wilcox Solar Observatory indicate that solar polar field strength for cycle 23 is ∼50% lower than for
The cosmic radiation in the heliosphere at successive solar minima
Comparative cosmic ray studies at the time of successive solar minima are of special importance in establishing the relative role of large-scale drift effects in the modulation process and in
Anomalous cosmic rays in the distant heliosphere and the reversal of the Sun's magnetic polarity in Cycle 23
Beginning in early June 2001 and extending over a ∼3 month period the Cosmic Ray Subsystem (CRS) experiment on Voyager 1 (80.3 AU, 34°N) observed a rapid transition in the energy of the peak
An explanation for the difference in cosmic ray modulation at low and neutron monitor energies during consecutive solar minimum periods
The phenomenon that galactic proton spectra measured during two consecutive solar minimum modulation periods intersect at a particular energy was studied with a drift model for the modulation of
Neutron monitor latitude survey of cosmic ray intensity during the 1986/1987 solar minimum
A latitude survey of the cosmic ray intensity at sea level was conducted during the 1986/1987 solar minimum period on commercial vessels of the South African Marine Corporation (SAFMARINE). The
22 Year Patterns in the Relationship of Sunspot Number and Tilt Angle to Cosmic-Ray Intensity
A comparison of 27 day averages of the sunspot number with the Galactic cosmic-ray intensity observed at Climax reveals a 22 yr pattern. The 11 yr cosmic-ray cycle appears to lag the sunspot cycle by
The return of the anomalous cosmic rays to 1 AU in 1992
New observations of low energy (approximately 1 to 200 MeV/nuc) cosmic rays measured by three newly launched experiments on Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) during 1992
...
1
2
3
...