Rapid recovery of anomalous cosmic ray flux at 1 Au in solar cycle 22

Nobuyuki Hasebe; Y. Mishima; K. Fujiki; M. Fujii; M. Kobayashi; T. Doke; J. Kikuchi; T. Hayashi; T. Shino; T. Ito; T. Takashima; T. Yanagimachi; A. Nakamoto; H. Murakami; K. Nagata; T. Kohno; K. Munakata; C. Kato; S. Yanagita; T. Kashiwagi; K. Maezawa; Y. Muraki; A. Nishida; T. Terasawa; B. Wilken

doi:10.1029/94GL02098

Rapid recovery of anomalous cosmic ray flux at 1 Au in solar cycle 22

Nobuyuki Hasebe^*, Y. Mishima, K. Fujiki, M. Fujii, M. Kobayashi, T. Doke, J. Kikuchi, T. Hayashi, T. Shino, T. Ito, T. Takashima, T. Yanagimachi, A. Nakamoto, H. Murakami, K. Nagata, T. Kohno, K. Munakata, C. Kato, S. Yanagita, T. KashiwagiK. Maezawa, Y. Muraki, A. Nishida, T. Terasawa, B. Wilken

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

A new observation of low energy cosmic ray particles with the energies from 4 to 120 MeV/n by the HEP instrument onboard the GEOTAIL satellite orbiting at 1 AU shows a remarkable enhancement of anomalous cosmic ray (ACR) N, O and Ne in the period September 1992–December 1993 before approaching to the solar minimum in solar cycle 22. The ACR fluxes obtained by the GEOTAIL observation are in good agreement with the results earlier obtained from the SAMPEX satellite [Mewaldt et al. 1993a,b]. The ACR carbon is also evident though the C enhancement is small compared with those of N, O and Ne. We confirm the new SAMPEX finding that the ACR fluxes have recovered more rapidly in 1992–1993 than in previous solar cycles and find this tendency continues to the end of 1993.

Original language	English
Pages (from-to)	3027-3030
Number of pages	4
Journal	Geophysical Research Letters
Volume	21
Issue number	25
DOIs	https://doi.org/10.1029/94GL02098
Publication status	Published - 1994
Externally published	Yes

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

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10.1029/94GL02098

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Hasebe, N., Mishima, Y., Fujiki, K., Fujii, M., Kobayashi, M., Doke, T., Kikuchi, J., Hayashi, T., Shino, T., Ito, T., Takashima, T., Yanagimachi, T., Nakamoto, A., Murakami, H., Nagata, K., Kohno, T., Munakata, K., Kato, C., Yanagita, S., ... Wilken, B. (1994). Rapid recovery of anomalous cosmic ray flux at 1 Au in solar cycle 22. Geophysical Research Letters, 21(25), 3027-3030. https://doi.org/10.1029/94GL02098

Hasebe, N, Mishima, Y, Fujiki, K, Fujii, M, Kobayashi, M, Doke, T, Kikuchi, J, Hayashi, T, Shino, T, Ito, T, Takashima, T, Yanagimachi, T, Nakamoto, A, Murakami, H, Nagata, K, Kohno, T, Munakata, K, Kato, C, Yanagita, S, Kashiwagi, T, Maezawa, K, Muraki, Y, Nishida, A, Terasawa, T & Wilken, B 1994, 'Rapid recovery of anomalous cosmic ray flux at 1 Au in solar cycle 22', Geophysical Research Letters, vol. 21, no. 25, pp. 3027-3030. https://doi.org/10.1029/94GL02098

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title = "Rapid recovery of anomalous cosmic ray flux at 1 Au in solar cycle 22",

abstract = "A new observation of low energy cosmic ray particles with the energies from 4 to 120 MeV/n by the HEP instrument onboard the GEOTAIL satellite orbiting at 1 AU shows a remarkable enhancement of anomalous cosmic ray (ACR) N, O and Ne in the period September 1992–December 1993 before approaching to the solar minimum in solar cycle 22. The ACR fluxes obtained by the GEOTAIL observation are in good agreement with the results earlier obtained from the SAMPEX satellite [Mewaldt et al. 1993a,b]. The ACR carbon is also evident though the C enhancement is small compared with those of N, O and Ne. We confirm the new SAMPEX finding that the ACR fluxes have recovered more rapidly in 1992–1993 than in previous solar cycles and find this tendency continues to the end of 1993.",

author = "Nobuyuki Hasebe and Y. Mishima and K. Fujiki and M. Fujii and M. Kobayashi and T. Doke and J. Kikuchi and T. Hayashi and T. Shino and T. Ito and T. Takashima and T. Yanagimachi and A. Nakamoto and H. Murakami and K. Nagata and T. Kohno and K. Munakata and C. Kato and S. Yanagita and T. Kashiwagi and K. Maezawa and Y. Muraki and A. Nishida and T. Terasawa and B. Wilken",

year = "1994",

doi = "10.1029/94GL02098",

language = "English",

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journal = "Geophysical Research Letters",

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T1 - Rapid recovery of anomalous cosmic ray flux at 1 Au in solar cycle 22

AU - Hasebe, Nobuyuki

AU - Mishima, Y.

AU - Fujiki, K.

AU - Fujii, M.

AU - Kobayashi, M.

AU - Doke, T.

AU - Kikuchi, J.

AU - Hayashi, T.

AU - Shino, T.

AU - Ito, T.

AU - Takashima, T.

AU - Yanagimachi, T.

AU - Nakamoto, A.

AU - Murakami, H.

AU - Nagata, K.

AU - Kohno, T.

AU - Munakata, K.

AU - Kato, C.

AU - Yanagita, S.

AU - Kashiwagi, T.

AU - Maezawa, K.

AU - Muraki, Y.

AU - Nishida, A.

AU - Terasawa, T.

AU - Wilken, B.

PY - 1994

Y1 - 1994

N2 - A new observation of low energy cosmic ray particles with the energies from 4 to 120 MeV/n by the HEP instrument onboard the GEOTAIL satellite orbiting at 1 AU shows a remarkable enhancement of anomalous cosmic ray (ACR) N, O and Ne in the period September 1992–December 1993 before approaching to the solar minimum in solar cycle 22. The ACR fluxes obtained by the GEOTAIL observation are in good agreement with the results earlier obtained from the SAMPEX satellite [Mewaldt et al. 1993a,b]. The ACR carbon is also evident though the C enhancement is small compared with those of N, O and Ne. We confirm the new SAMPEX finding that the ACR fluxes have recovered more rapidly in 1992–1993 than in previous solar cycles and find this tendency continues to the end of 1993.

AB - A new observation of low energy cosmic ray particles with the energies from 4 to 120 MeV/n by the HEP instrument onboard the GEOTAIL satellite orbiting at 1 AU shows a remarkable enhancement of anomalous cosmic ray (ACR) N, O and Ne in the period September 1992–December 1993 before approaching to the solar minimum in solar cycle 22. The ACR fluxes obtained by the GEOTAIL observation are in good agreement with the results earlier obtained from the SAMPEX satellite [Mewaldt et al. 1993a,b]. The ACR carbon is also evident though the C enhancement is small compared with those of N, O and Ne. We confirm the new SAMPEX finding that the ACR fluxes have recovered more rapidly in 1992–1993 than in previous solar cycles and find this tendency continues to the end of 1993.

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JF - Geophysical Research Letters

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Rapid recovery of anomalous cosmic ray flux at 1 Au in solar cycle 22

Abstract

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