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Do the Throat Auroras Create Polar Cap Patches? [PDF]

Geophysical Research Letters, 2023
Throat auroras and polar cap patches are common phenomena in the polar ionosphere resulting from magnetosphere‐ionosphere coupling. A campaign was organized, with all‐sky imagers at Yellow River Station, the European Incoherent Scatter Svalbard Radar ...
Duan Zhang, Qing‐He Zhang, Kjellmar Oksavik, Tong Xu, Zan‐Yang Xing, L. R. Lyons, De‐Sheng Han, Hong‐Bo Zhang, Yu‐Zhang Ma, Ze‐Jun Hu, Jian‐Jun Liu, Yong Wang, Xiang‐Yu Wang   +12 more
doaj   +5 more sources

GPS scintillations associated with cusp dynamics and polar cap patches [PDF]

Journal of Space Weather and Space Climate, 2017
This paper investigates the relative scintillation level associated with cusp dynamics (including precipitation, flow shears, etc.) with and without the formation of polar cap patches around the cusp inflow region by the EISCAT Svalbard radar (ESR) and ...
Jin Yaqi, Moen Jøran I., Oksavik Kjellmar, Spicher Andres, Clausen Lasse B.N., Miloch Wojciech J.   +5 more
doaj   +9 more sources

Polar Cap Hot Patches: Enhanced Density Structures Different From the Classical Patches in the Ionosphere [PDF]

Geophysical Research Letters, 2017
AbstractBased on in situ and ground‐based observations, a new type of “polar cap hot patch” has been identified that is different from the classical polar cap enhanced density structure (cold patches). Comparing with the classical polar cap patches, which are transported from the dayside sunlit region with dense and cold plasma, the polar cap hot ...
Zan-Yang Xing, Shun-Rong Zhang, John C. Foster   +2 more
exaly   +6 more sources

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

Geophysical Research Letters, 2018
The 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 ...
Yu‐Zhang Ma, Qing‐He Zhang, Zan‐Yang Xing, Roderick A. Heelis, Kjellmar Oksavik, Yong Wang   +5 more
doaj   +3 more sources

Recently research advances on the polar cap patches

地球与行星物理论评, 2023
The polar cap patch is a common ionospheric structure. It often appears in the F region of the ionosphere over the polar caps; these patches are usually characterized by electron densities that can be even twice greater than that of the surrounding area.
Yong Wang, Qinghe Zhang, Zanyang Xing, Yuzhang Ma, Duan Zhang   +4 more
doaj   +2 more sources

Polar Cap Patches Scaling Properties: Insights from Swarm Data

Remote Sensing, 2023
Among the effects of space weather, the degradation of air traffic communications and satellite-based navigation systems are the most notable.
Roberta Tozzi, Paola De Michelis, Giulia Lovati, Giuseppe Consolini, Alessio Pignalberi, Michael Pezzopane, Igino Coco, Fabio Giannattasio, Maria Federica Marcucci   +8 more
doaj   +2 more sources

The Interconnection Between Cross‒Polar Cap Convection and the Luminosity of Polar Cap Patches [PDF]

Journal of Geophysical Research: Space Physics, 2013
The transport of patches of ionization across the polar cap is carried by the convection electric field, which imposes an E×B drift to the plasma. This drift has an upward component when the plasma is convected toward the north magnetic pole and a downward component as it moves away from the pole.
Keisuke Hosokawa, Gareth Perry, J -P St -Maurice   +2 more
exaly   +2 more sources

Edge of Polar Cap Patches [PDF]

Journal of Geophysical Research: Space Physics, 2016
AbstractOn the night of 4 December 2013, a sequence of polar cap patches was captured by an all‐sky airglow imager (ASI) in Longyearbyen, Norway (78.1°N, 15.5°E). The 630.0 nm airglow images from the ASI of 4 second exposure time, oversampled the emission of natural lifetime (with quenching) of at least ∼30 sec, introduce no observational blurring ...
Keisuke Hosokawa, Satoshi Taguchi, Yasunobu Ogawa   +2 more
exaly   +2 more sources

In Situ Measurement of a Newly Created Polar Cap Patch [PDF]

Journal of Geophysical Research: Space Physics, 2010
The Investigation of Cusp Irregularities 2 sounding rocket was launched 5 December 2008 at 1035 UT. We present an overview of the associated solar wind and auroral conditions, and we look in detail at the relationship between poleward moving auroral forms (PMAFs) and the creation of polar cap patches using ground‐based optical and radar data as well as
Dag A Lorentzen, Yoshifumi Saito, Magnar G Johnsen   +2 more
exaly   +2 more sources

Polar Cap Patch Transportation Beyond the Classic Scenario [PDF]

Journal of Geophysical Research: Space Physics, 2016
AbstractWe report the continuous monitoring of a polar cap patch, encompassing its creation, and a subsequent evolution that differs from the classic behavior. The patch was formed from the storm‐enhanced density plume, by segmentation associated with a subauroral polarization stream generated by a substorm.
Mark Lester, Evan G Thomas, Beichen Zhang   +2 more
exaly   +4 more sources