Automated Technique for the Detection of Step‐Like Solar Wind Dynamic Pressure Changes: Application to the Response of the Transpolar Potential to Solar Wind Dynamic Pressure Fronts

Boudouridis, A.; Zesta, E.

doi:10.1029/2021JA029198

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Automated Technique for the Detection of Step‐Like Solar Wind Dynamic Pressure Changes: Application to the Response of the Transpolar Potential to Solar Wind Dynamic Pressure Fronts

2021
By Boudouridis, A. ; Zesta, E.
Source: Journal of Geophysical Research: Space Physics, 126, e2021JA029198

[PDF-2.98 MB]

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Details:

Journal Title:

Journal of Geophysical Research: Space Physics
Personal Author:

Boudouridis, A. ; Zesta, E.

Boudouridis, A. ; Zesta, E. Less -
NOAA Program & Office:

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) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
Description:

The input from the solar wind (SW) and the accompanying Interplanetary Magnetic Field (IMF) is the defining feature of the solar wind-magnetosphere interactions. One of the most important SW drivers is the solar wind dynamic pressure, and most significantly its sharp changes known as pressure fronts. Sudden enhancements in solar wind dynamic pressure, urn:x-wiley:21699380:media:jgra56566:jgra56566-math-0001, have been shown to lead to intensification of the auroral electrojets (and Region 1 field-aligned currents), increase in auroral emissions, and significant enhancement in ionospheric convection and the transpolar potential. Case studies of the interaction between pressure fronts and the terrestrial space environment shed great light on their importance to the structure and dynamics of the system. However, thorough understanding of the interaction requires fully statistical investigations. These statistical studies require a large number of suitable pressure front events. In the past these have been obtained through laborious manual inspection of solar wind data. We present an automated procedure that identifies sudden step enhancements in urn:x-wiley:21699380:media:jgra56566:jgra56566-math-0002 that satisfy a desired set of limiting step-like characteristics, such as magnitude of the change, sign of the change (positive/negative), and rate of change. The procedure yields a list of suitable events, along with their step features within minutes. The technique is tested for missed events and false positives by direct comparison to manual inspection of the data. Its utility is illustrated by application to the statistical effect of pressure fronts to the transpolar potential as measured by the Assimilative Mapping of Ionospheric Electrodynamics (AMIE) technique.
Keywords:

[+]

Solar wind Solar Wind Dynamic Pressure Fronts Transpolar Potential
Source:

Journal of Geophysical Research: Space Physics, 126, e2021JA029198
DOI:

https://doi.org/10.1029/2021JA029198
Document Type:

Journal Article
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Main Document Checksum:

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urn:sha256:cddbf6625293beef617fa7dbb651dac51775d94e9706d4808be0639210c9966b
Download URL:

https://repository.library.noaa.gov/view/noaa/44584/noaa_44584_DS1.pdf
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htm

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