Search Results - "Clausen, Lasse B.N."

Ionospheric plasma structuring in relation to auroral particle precipitation by Enengl, Florine, Kotova, Daria, Jin, Yaqi, Clausen, Lasse B.N., Miloch, Wojciech J.

“…Auroral particle precipitation potentially plays the main role in ionospheric plasma structuring. The impact of auroral particle precipitation on plasma…”
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GPS scintillations associated with cusp dynamics and polar cap patches by Jin, Yaqi, Moen, Jøran I., Oksavik, Kjellmar, Spicher, Andres, Clausen, Lasse B.N., Miloch, Wojciech J.

“…This paper investigates the relative scintillation level associated with cusp dynamics (including precipitation, flow shears, etc.) with and without the…”
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Statistical models of the variability of plasma in the topside ionosphere: 2. Performance assessment by Spogli, Luca, Jin, Yaqi, Urbář, Jaroslav, Wood, Alan G., Donegan-Lawley, Elizabeth E., Clausen, Lasse B.N., Shahtahmassebi, Golnaz, Alfonsi, Lucilla, Rawlings, James T., Cicone, Antonio, Kotova, Daria, Cesaroni, Claudio, Høeg, Per, Dorrian, Gareth D., Nugent, Luke D., Elvidge, Sean, Themens, David R., Aragón, María José Brazal, Wojtkiewicz, Pawel, Miloch, Wojciech J.

“…Statistical models of the variability of plasma in the topside ionosphere based on the Swarm data have been developed in the “Swarm Variability of Ionospheric…”
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The role of particle precipitation on plasma structuring at different altitudes by in-situ measurements by Buschmann, Lisa M., Bonnell, John W., Bounds, Scott, Clausen, Lasse B.N., Kletzing, Craig, Marholm, Sigvald, Miloch, Wojciech J., Roglans, Roger, Spicher, Andres

“…The plasma in the cusp ionosphere is subject to particle precipitation, which is important for the development of large-scale irregularities in the plasma…”
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Climatology and modeling of ionospheric irregularities over Greenland based on empirical orthogonal function method by Jin, Yaqi, Clausen, Lasse B.N., Miloch, Wojciech J., Høeg, Per, Jarmołowski, Wojciech, Wielgosz, Paweł, Paziewski, Jacek, Milanowska, Beata, Hoque, Mainul, Berdermann, Jens, Lyu, Haixia, Hernández-Pajares, Manuel, García-Rigo, Alberto

“…This paper addresses the long-term climatology (over two solar cycles) of total electron content (TEC) irregularities from a polar cap station (Thule) using…”
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Solar cycle and seasonal variations of the GPS phase scintillation at high latitudes by Jin, Yaqi, Miloch, Wojciech J., Moen, Jøran I., Clausen, Lasse B.N.

“…We present the long-term statistics of the GPS phase scintillation in the polar region (70°–82° magnetic latitude) by using the GPS scintillation data from…”
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Ionospheric plasma irregularities studied with Swarm satellites by Miloch, Wojciech J., Jin, Yaqi, Xiong, Chao, Kervalishvili, Guram, Spicher, Andres, Clausen, Lasse B.N., Stolle, Claudia

“…To study and characterise the ionospheric plasma irregularities at all latitudes, one can employ in-situ measurements by satellites in polar orbits, such as…”
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Automatic Classification of Auroral Images From the Oslo Auroral THEMIS (OATH) Data Set Using Machine Learning by Clausen, Lasse B. N., Nickisch, Hannes

“…Based on their salient features we manually label 5,824 images from various Time History of Events and Macroscale Interactions during Substorms (THEMIS)…”
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Ionospheric Plasma Irregularities Characterized by the Swarm Satellites: Statistics at High Latitudes by Jin, Yaqi, Spicher, Andres, Xiong, Chao, Clausen, Lasse B. N., Kervalishvili, Guram, Stolle, Claudia, Miloch, Wojciech J.

“…The polar ionosphere is often characterized by irregularities and fluctuations in the plasma density. We present a statistical study of ionospheric plasma…”
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Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure by Jin, Yaqi, Moen, Jøran Idar, Spicher, Andres, Liu, Jianjun, Clausen, Lasse B. N., Miloch, Wojciech J.

“…Abrupt changes in the solar wind dynamic pressure can greatly affect the Earth's magnetosphere‐ionosphere system. We present an ionospheric flow vortex in the…”
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The Lifetimes of Plasma Structures at High Latitudes by Ivarsen, Magnus F., Jin, Yaqi, Spicher, Andres, Miloch, Wojciech, Clausen, Lasse B. N.

“…We present an investigation of polar cap plasma structure lifetimes. We analyze both simulated data from ionospheric models (International Reference Ionosphere…”
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Ionospheric Plasma Fluctuations Induced by the NWC Very Low Frequency Signal Transmitter by Ivarsen, Magnus F., Park, Jaeheung, Jin, Yaqi, Clausen, Lasse B. N.

“…The Australian NWC (North West Cape) signal transmitter is known to strongly interfere with the topside ionosphere. We analyze 456 conjunctions between Swarm…”
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Multi-scale response of the high-latitude topside ionosphere to geospace forcing by Urbar, Jaroslav, Spogli, Luca, Cicone, Antonio, Clausen, Lasse B.N., Jin, Yaqi, Wood, Alan G., Alfonsi, Lucilla, Cesaroni, Claudio, Kotova, Daria, Høeg, Per, Miloch, Wojciech J.

“…We investigate the response of the topside ionosphere, auroral and polar sectors, to the forcing of the geospace during September 2017. Specifically, we aim at…”
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Electron density fluctuations from Swarm as a proxy for ground-based scintillation data: A statistical perspective by Kotova, Daria, Jin, Yaqi, Spogli, Luca, Wood, Alan G., Urbar, Jaroslav, Rawlings, James T., Whittaker, Ian C., Alfonsi, Lucilla, Clausen, Lasse B.N., Høeg, Per, Miloch, Wojciech J.

“…The Swarm satellite mission has been used for numerous studies of the ionosphere. Here we use a global product, based on electron density measurements from…”
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Direct Evidence for the Dissipation of Small‐Scale Ionospheric Plasma Structures by a Conductive E Region by Ivarsen, Magnus F, Jin, Yaqi, Spicher, Andres, Clausen, Lasse B N

“…The conductivity of the ionospheric E region is known to cause effective dissipation of plasma structures in the F region. We use 3.5 years of 16‐Hz sampling…”
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Interferometric Study of Ionospheric Plasma Irregularities in Regions of Phase Scintillations and HF Backscatter by Spicher, Andres, LaBelle, James, Bonnell, John W., Roglans, Roger, Moser, Chrystal, Fuselier, Stephen A., Bounds, Scott, Clausen, Lasse B. N., Di Mare, Francesca, Feltman, Connor A., Jin, Yaqi, Kletzing, Craig, Miloch, Wojciech J., Moen, Jøran I., Oksavik, Kjellmar, Sawyer, Rhyan, Takahashi, Toru, Yeoman, Tim K.

“…We investigate the nature of small‐scale irregularities observed in the cusp by the Twin Rockets to Investigate Cusp Electrodynamics‐2 (TRICE‐2) in regions of…”
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Statistical Distribution of Decameter Scale (50 m) Ionospheric Irregularities at High Latitudes by Jin, Yaqi, Clausen, Lasse B. N., Spicher, Andres, Ivarsen, Magnus F., Zhang, Yongliang, Miloch, Wojciech J., Moen, Jøran I.

“…We present a study of decameter scale ionospheric irregularities using in‐situ electron density data from the NorSat‐1 satellite. During the current period of…”
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Steepening Plasma Density Spectra in the Ionosphere: The Crucial Role Played by a Strong E‐Region by Ivarsen, Magnus F., St‐Maurice, Jean‐Pierre, Jin, Yaqi, Park, Jaeheung, Miloch, Wojciech, Spicher, Andres, Kwak, Young‐Sil, Clausen, Lasse B. N.

“…Based on the Swarm 16 Hz Advanced Plasma Density data set, and using the Swarm A satellite, we apply automatic detection of spectral breaks in seven million…”
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Statistical study of the GNSS phase scintillation associated with two types of auroral blobs by Jin, Yaqi, Moen, Jøran I., Miloch, Wojciech J., Clausen, Lasse B. N., Oksavik, Kjellmar

“…This study surveys space weather effects on GNSS (Global Navigation Satellite System) signals in the nighttime auroral and polar cap ionosphere using…”
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Severe and localized GNSS scintillation at the poleward edge of the nightside auroral oval during intense substorm aurora by van der Meeren, Christer, Oksavik, Kjellmar, Lorentzen, Dag A., Rietveld, Michael T., Clausen, Lasse B. N.

“…In this paper we study how GPS, GLONASS, and Galileo navigation signals are compromised by strong irregularities causing severe phase scintillation (σϕ>1) in…”
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