Sökning: id:"swepub:oai:DiVA.org:ltu-76359"
> (2020) >
The fate of O+ ions...
The fate of O+ ions observed in the plasma mantle: particle tracing modelling and cluster observations
-
- Schillings, Audrey (författare)
- Luleå tekniska universitet,Rymdteknik,Swedish Institute of Space Physics, Kiruna, Sweden
-
- Gunell, Herbert (författare)
- Umeå universitet,Institutionen för fysik,Department of Physics, Umeå University, Umeå, Sweden; Belgian Institute for Space Aeronomy, Brussels, Belgium
-
- Nilsson, Hans (författare)
- Luleå tekniska universitet,Rymdteknik,Swedish Institute of Space Physics, Kiruna, Sweden
-
visa fler...
-
- De Spiegeleer, Alexandre (författare)
- Umeå universitet,Institutionen för fysik,Department of Physics, Umeå University, Umeå, Sweden
-
- Ebihara, Yusuke (författare)
- Research Institute for Sustainable Humanosphere, Kyoto University, 611-0011, Gokasho, Uji, Kyoto, Japan
-
- Westerberg, Lars Göran (författare)
- Luleå tekniska universitet,Strömningslära och experimentell mekanik
-
- Yamauchi, Masatoshi (författare)
- Swedish Institute of Space Physics, Kiruna, Sweden
-
- Slapak, Rikard (författare)
- EISCAT Scientific Association, Kiruna, Sweden
-
visa färre...
-
(creator_code:org_t)
- 2020-06-03
- 2020
- Engelska.
-
Ingår i: Annales Geophysicae. - : Copernicus Publications. - 0992-7689 .- 1432-0576. ; 38:3, s. 645-656
- Relaterad länk:
-
https://ltu.diva-por... (primary) (Raw object)
-
visa fler...
-
https://angeo.copern...
-
https://doi.org/10.5...
-
https://umu.diva-por... (primary) (Raw object)
-
https://urn.kb.se/re...
-
https://doi.org/10.5...
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- Ion escape is of particular interest for studying the evolution of the atmosphere on geological timescales. Previously, using Cluster-CODIF data, we investigated the oxygen ion outflow from the plasma mantle for different solar wind conditions and geomagnetic activity. We found significant correlations between solar wind parameters, geomagnetic activity (Kp index), and the O+ outflow. From these studies, we suggested that O+ ions observed in the plasma mantle and cusp have enough energy and velocity to escape the magnetosphere and be lost into the solar wind or in the distant magnetotail. Thus, this study aims to investigate where the ions observed in the plasma mantle end up. In order to answer this question, we numerically calculate the trajectories of O+ ions using a tracing code to further test this assumption and determine the fate of the observed ions. Our code consists of a magnetic field model (Tsyganenko T96) and an ionospheric potential model (Weimer 2001) in which particles initiated in the plasma mantle region are launched and traced forward in time. We analysed 131 observations of plasma mantle events in Cluster data between 2001 and 2007, and for each event 200 O+ particles were launched with an initial thermal and parallel bulk velocity corresponding to the velocities observed by Cluster. After the tracing, we found that 98 % of the particles are lost into the solar wind or in the distant tail. Out of these 98 %, 20 % escape via the dayside magnetosphere.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- Atmosfärsvetenskap
- Atmospheric Science
- Strömningslära
- Fluid Mechanics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas