Long-Term Temporal Behavior of Interplanetary and Trapped Anomalous Cosmic Rays

Leske, R. A. and Mewaldt, R. A. and Selesnick, R. S. and Cummings, A. C. and von Rosenvinge, T. T. and Stone, E. C. and Wiedenbeck, M. E. (1999) Long-Term Temporal Behavior of Interplanetary and Trapped Anomalous Cosmic Rays. In: Proceedings of the 26th International Cosmic Ray Conference. Vol.7. International Union of Pure and Applied Physics , pp. 516-518. https://resolver.caltech.edu/CaltechAUTHORS:20150212-105955417

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Abstract

New measurements of the long-term temporal history of anomalous cosmic rays (ACRs) at 1 AU are presented, based on data from SAMPEX and ACE. Over the period from 1992 to 1997 the interplanetary intensity of 8 to 27 MeV/nuc ACR oxygen increased by a factor of -5 as solar minimum approached. The intensity of ACR oxygen trapped in the Earth's magnetosphere showed a corresponding time history. Early in 1998 both the interplanetary and trapped intensities suddenly decreased with the onset of solar activity leading to the next solar maximum. We discuss the relation of the time-delay between changes in the interplanetary and trapped fluxes, possible solar/interplanetary causes of these changes, and the lifetime of trapped ACRs in Earth's magnetosphere.

Item Type:

Book Section

Related URLs:

URL	URL Type	Description
http://adsabs.harvard.edu/full/1999ICRC....7..516L	ADS	Article

ORCID:

Author	ORCID
Leske, R. A.	0000-0002-0156-2414
Mewaldt, R. A.	0000-0003-2178-9111
Cummings, A. C.	0000-0002-3840-7696
Stone, E. C.	0000-0002-2010-5462
Wiedenbeck, M. E.	0000-0002-2825-3128

Additional Information:

This work was supported by NASA under grants NAGS-2963 and NAGS-6912 at Caltech, and at the Jet Propulsion Laboratory and the Goddard Space Flight Center.

Group:

Space Radiation Laboratory

Funders:

Funding Agency	Grant Number
NASA	NAGS-2963
NASA	NAG5-6912

Other Numbering System:

Other Numbering System Name	Other Numbering System ID
Space Radiation Laboratory	1999-23

Record Number:

CaltechAUTHORS:20150212-105955417

Persistent URL:

https://resolver.caltech.edu/CaltechAUTHORS:20150212-105955417

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No commercial reproduction, distribution, display or performance rights in this work are provided.

ID Code:

54781

Collection:

CaltechAUTHORS

Deposited By:

Deborah Miles

Deposited On:

13 Feb 2015 03:13

Last Modified:

09 Mar 2020 13:19

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