Energetic Electron Precipitation: Multievent Analysis of Its Spatial Extent During EMIC Wave Activity

Capannolo, L.; Li, W.; Ma, Q.; Shen, X.‐C.; Zhang, X.‐J.; Redmon, R. J.; Rodriguez, J. V.; Engebretson, M. J.; Kletzing, C. A.; Kurth, W. S.; Hospodarsky, G. B.; Spence, H. E.; Reeves, G. D.; Raita, T.

doi:10.1029/2018JA026291

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Energetic Electron Precipitation: Multievent Analysis of Its Spatial Extent During EMIC Wave Activity

2019
By Capannolo, L. ; Li, W. ; Ma, Q. ; ...
Source: Journal of Geophysical Research: Space Physics, 124(4), 2466-2483.

[PDF-10.55 MB]

Select the Download button to view the document

This document is over 5mb in size and cannot be previewed

Details Related Documents You May Also Like

Details:

Journal Title:

Journal of Geophysical Research: Space Physics
Personal Author:

Capannolo, L. ; Li, W. ; Ma, Q. ; Shen, X.‐C. ; Zhang, X.‐J. ; ... More +

Capannolo, L. ; Li, W. ; Ma, Q. ; Shen, X.‐C. ; Zhang, X.‐J. ; Redmon, R. J. ; Rodriguez, J. V. ; Engebretson, M. J. ; Kletzing, C. A. ; Kurth, W. S. ; Hospodarsky, G. B. ; Spence, H. E. ; Reeves, G. D. ; Raita, T. Less -
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences) ; NESDIS (National Environmental Satellite, Data, and Information Service) ; NCEI (National Centers for Environmental Information)

CIRES (Cooperative Institute for Research in Environmental Sciences) ; NESDIS (National Environmental Satellite, Data, and Information Service) ; NCEI (National Centers for Environmental Information) Less -
Description:

Electromagnetic ion cyclotron (EMIC) waves can drive precipitation of tens of keV protons and relativistic electrons, and are a potential candidate for causing radiation belt flux dropouts. In this study, we quantitatively analyze three cases of EMIC‐driven precipitation, which occurred near the dusk sector observed by multiple Low‐Earth‐Orbiting (LEO) Polar Operational Environmental Satellites/Meteorological Operational satellite programme (POES/MetOp) satellites. During EMIC wave activity, the proton precipitation occurred from few tens of keV up to hundreds of keV, while the electron precipitation was mainly at relativistic energies. We compare observations of electron precipitation with calculations using quasi‐linear theory. For all cases, we consider the effects of other magnetospheric waves observed simultaneously with EMIC waves, namely, plasmaspheric hiss and magnetosonic waves, and find that the electron precipitation at MeV energies was predominantly caused by EMIC‐driven pitch angle scattering. Interestingly, each precipitation event observed by a LEO satellite extended over a limited L shell region (ΔL ~ 0.3 on average), suggesting that the pitch angle scattering caused by EMIC waves occurs only when favorable conditions are met, likely in a localized region. Furthermore, we take advantage of the LEO constellation to explore the occurrence of precipitation at different L shells and magnetic local time sectors, simultaneously with EMIC wave observations near the equator (detected by Van Allen Probes) or at the ground (measured by magnetometers). Our analysis shows that although EMIC waves drove precipitation only in a narrow ΔL, electron precipitation was triggered at various locations as identified by POES/MetOp over a rather broad region (up to ~4.4 hr MLT and ~1.4 L shells) with similar patterns between satellites.
Keywords:

[+]

Electromagnetic Waves Electron Precipitation Meteorological Satellites
Source:

Journal of Geophysical Research: Space Physics, 124(4), 2466-2483.
DOI:

https://doi.org/10.1029/2018JA026291
Document Type:

Journal Article
Rights Information:

Other
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:8c79a37caea78f3998ab8e094164a1a7478d15532ecb8ee33e4e719412418395
Download URL:

https://repository.library.noaa.gov/view/noaa/27959/noaa_27959_DS1.pdf
File Type:

No Additional Files

More +

Energetic Electron Precipitation: Multievent Analysis of Its Spatial Extent During EMIC Wave Activity

Details:

Supporting Files

Related Documents

You May Also Like