The Ion/Electron Temperature Characteristics of Polar Cap Classical and Hot Patches and their Influence on Ion Upflow

Simple item page
dc.contributor.ORCID0000-0002-5543-5357 (Heelis, RA)
dc.contributor.authorMa, Y. -Z
dc.contributor.authorZhang, Q. -H
dc.contributor.authorXing, Z. -Y
dc.contributor.authorHeelis, Roderick A.
dc.contributor.authorOksavik, K.
dc.contributor.authorWang, Y.
dc.contributor.utdAuthorHeelis, Roderick A.
dc.date.accessioned2019-08-30T16:39:54Z
dc.date.available2019-08-30T16:39:54Z
dc.date.created2018-08-23
dc.descriptionIncludes supplementary material
dc.description.abstractThe term of “polar cap hot patch” is a newly identified high-density plasma irregularity at high latitudes, which is associated with high electron temperature and particle precipitation, while a classical polar cap patch has lower electron temperature. To investigate characteristics of hot patches versus classical patches, five years of in situ database of plasma observations from the DMSP satellites was analyzed. For the first time, we show how the ion/electron temperature ratio (or temperature difference) can be used to distinguish between classical and hot patches. For classical patches (Ti/Te > 0.8 or Te Ti + 600 K), the vertical ion flux is generally upward. The highest upflow occurrence was found near the polar cap boundary, associated with hot patches, particle precipitation, strong convection speed, and localized field-aligned currents. This result shows that the polar cap hot patches may play a very important role in solar wind-magnetosphere-ionosphere coupling processes. ©2018. American Geophysical Union. All Rights Reserved.
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.description.departmentWilliam B. Hanson Center for Space Sciences
dc.description.sponsorshipResearch Council of Norway. Grant Number: 223252; Shandong Provincial Natural Science Foundation. Grant Number: JQ201412; National Natural Science Foundation of China. Grant Numbers: 41574138, 41604139, 41431072, 41774166.
dc.identifier.bibliographicCitationMa, Y. -Z, Q. -H Zhang, Z. -Y Xing, R. A. Heelis, et al. 2018. "The Ion/Electron Temperature Characteristics of Polar Cap Classical and Hot Patches and Their Influence on Ion Upflow." Geophysical Research Letters 45(16): 8072-8080, doi:10.1029/2018GL079099
dc.identifier.issn0094-8276
dc.identifier.issue16
dc.identifier.urihttps://hdl.handle.net/10735.1/6808
dc.identifier.volume45
dc.language.isoen
dc.publisherBlackwell Publishing Ltd
dc.relation.urihttp://dx.doi.org/10.1029/2018GL079099
dc.rights©2018 American Geophysical Union. All Rights Reserved.
dc.source.journalGeophysical Research Letters
dc.subjectElectron temperature
dc.subjectIons--Temperature
dc.subjectPolar ionosphere
dc.subjectIonosphere
dc.subjectMagnetosphere
dc.subjectPrecipitation (Chemistry)
dc.subjectHigh-density plasmas
dc.titleThe Ion/Electron Temperature Characteristics of Polar Cap Classical and Hot Patches and their Influence on Ion Upflow
dc.title.alternativeGeophysical Research Letters
dc.type.genrearticle

Files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
NSM-2491-260033.95-LINK.pdf
Size:
165.7 KB
Format:
Adobe Portable Document Format
Description:
Link to Article
Download

Collections

Heelis, Roderick A.
CSS Research