Identification

Title

Multi‐point observations of modulated whistler‐mode waves and energetic electron precipitation

Abstract

In this study, we present simultaneous multi-point observations of whistler-mode waves detected by RBSP-B, associated with conjugate electron precipitation observed through enhanced BARREL X-rays at L similar to 6 from noon to dusk. Both long period modulation at periods of several to tens of minutes and short period modulation at about tens of seconds are observed in X-ray measurements. Similar periodicities are also observed for whistler-mode wave amplitude. We show that the correlation coefficient between whistler-mode waves and electron precipitation is high in several regions, including plumes and plasma trough. Ultra-low-frequency waves (8-30 mHz), which have been suggested to play a potential role in precipitating electrons by modulating whistler-mode wave intensity or loss cone size, show a weak correlation with whistler-mode wave amplitudes and the X-ray counts during the conjunction. We further evaluate whistler-mode wave driven electron precipitation using a physics-based technique. The time evolution of the modeled electron precipitation is found to be remarkably consistent with the modulation in the BARREL X-ray counts both in plumes and plasma trough. By taking advantage of the high-resolution wave data and close conjunction, we provide strong evidence that whistler-mode waves are not only directly responsible for the longer modulation (several to tens of minutes), but also the shorter modulation (tens of seconds) of the electron precipitation.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7jh3qqh

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

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keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

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Dataset reference date

date type

publication

effective date

2021-12-01T00:00:00Z

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Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

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