Alexander Kozlovsky
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View article: Solar Wind–Ionosphere–Troposphere Coupling Via the Polar Branch of the Global Electric Circuit
Solar Wind–Ionosphere–Troposphere Coupling Via the Polar Branch of the Global Electric Circuit Open
It is believed that the global atmospheric electrical circuit (GEC) could provide a possible link between the space environment and terrestrial weather. The electric charge from electrified clouds is uniformly distributed on the highly con…
View article: Characteristics of Atmospheric Gravity Waves and Medium Scale Traveling Ionospheric Disturbances Derived From EISCAT Measurements
Characteristics of Atmospheric Gravity Waves and Medium Scale Traveling Ionospheric Disturbances Derived From EISCAT Measurements Open
This study investigates the characteristics of medium scale traveling ionospheric disturbances (MSTIDs) relative amplitudes () in the ionospheric E to lower F regions, using the EISCAT VHF radar data measured from 41 daytime runs in years …
View article: New insights into the polar ozone and water vapor, radiative effects, and their connection to the tides in the mesosphere–lower thermosphere during major sudden stratospheric warming events
New insights into the polar ozone and water vapor, radiative effects, and their connection to the tides in the mesosphere–lower thermosphere during major sudden stratospheric warming events Open
We examine the variability of diurnal tide (DT), semidiurnal tide (SDT), and terdiurnal tide (TDT) amplitudes in the Arctic mesosphere and lower thermosphere (MLT) during and after sudden stratospheric warming (SSW) events using meteor rad…
View article: TIMED Doppler Interferometer measurements of neutral winds at the mesosphere and lower thermosphere and comparison to meteor radar winds
TIMED Doppler Interferometer measurements of neutral winds at the mesosphere and lower thermosphere and comparison to meteor radar winds Open
The mesosphere and lower thermosphere (MLT) comprise a highly variable region that forms the transition region between the middle and upper atmosphere. The variability of this region is driven by atmospheric waves transporting energy and m…
View article: Polar ozone anomalies, radiative effects, and their connection to mesospheric tidal dynamics during extreme events
Polar ozone anomalies, radiative effects, and their connection to mesospheric tidal dynamics during extreme events Open
Continuous ozone measurements above Ny-Ålesund, Svalbard (79°N, 12°E), using the ground-based microwave radiometer GROMOS-C, effectively capture the daily, seasonal, and interannual variability of polar ozone in the middle a…
View article: Comparison of Volume Velocity Processing (VVP) and 3DVAR+DIV Algorithms for Deriving 3D Wind Fields in the Mesosphere and Lower Thermosphere  with Meteor Radar Observations. 
Comparison of Volume Velocity Processing (VVP) and 3DVAR+DIV Algorithms for Deriving 3D Wind Fields in the Mesosphere and Lower Thermosphere  with Meteor Radar Observations.  Open
Accurate estimation of three-dimensional wind fields in the mesosphere and lower thermosphere (MLT) is crucial for understanding atmospheric dynamics and variability, however, it has been a longstanding challenge in atmospheric science. Pa…
View article: Statistical analysis of Multistatic meteor radar observations
Statistical analysis of Multistatic meteor radar observations Open
Multistatic meteor radar networks have become a valuable tool to study the spatial and temporal variability of mesosphere/lower thermosphere winds. Combined with advanced and tomographic analysis such as the 3DVAR+DIV or VVP algorithm it i…
View article: Atmospheric Gravity Waves and Medium Scale Traveling Ionospheric Disturbances at Auroral Latitudes
Atmospheric Gravity Waves and Medium Scale Traveling Ionospheric Disturbances at Auroral Latitudes Open
To investigate physical links between the Earth atmosphere and ionosphere, we present data of the medium-scale atmospheric gravity waves (AGWs, periods 25–100 min) observed at auroral latitudes. The AGWs at 80–100 km altitude were inferred…
View article: New insights into the polar ozone and water vapor, radiative effects, and their connection to the tides in the mesosphere-lower thermosphere during major Sudden Stratospheric Warming events
New insights into the polar ozone and water vapor, radiative effects, and their connection to the tides in the mesosphere-lower thermosphere during major Sudden Stratospheric Warming events Open
We examine the variability of diurnal (DT), semidiurnal (SDT), and terdiurnal (TDT) tide amplitudes in the Arctic mesosphere and lower thermosphere (MLT) during and after sudden stratospheric warming (SSW) events using meteor radar data at…
View article: Seasonal and Local Time Variation in the Observed Peak of the Meteor Altitude Distributions by Meteor Radars
Seasonal and Local Time Variation in the Observed Peak of the Meteor Altitude Distributions by Meteor Radars Open
Meteoroids of sub‐milligram sizes burn up high in the Earth's atmosphere and cause streaks of plasma trails detectable by meteor radars. The altitude at which these trails, or meteors, form depends on a number of factors including atmosphe…
View article: Solar Activity Dependence of Traveling Ionospheric Disturbance Amplitudes Using a Rapid‐Run Ionosonde in High Latitudes
Solar Activity Dependence of Traveling Ionospheric Disturbance Amplitudes Using a Rapid‐Run Ionosonde in High Latitudes Open
We investigated the amplitude of medium scale traveling ionospheric disturbances (MSTIDs, with periods 25–100 min) and their dependence on the solar activity using 16 years data of the rapid run‐ionosonde operating at high latitudes (N, So…
View article: A Deep Learning Approach for Automatic Ionogram Parameters Recognition With Convolutional Neural Networks
A Deep Learning Approach for Automatic Ionogram Parameters Recognition With Convolutional Neural Networks Open
Typical ionosondes operate with >5 min time intervals, which is enough to obtain regular parameters of the ionosphere, but insufficient to observe short‐term processes in the Earth's ionosphere. The key point for this study is to increase …
View article: TIMED Doppler Interferometer Measurements of Neutral Winds at the Mesosphere and Lower Thermosphere and Comparison to Meteor Radar Winds
TIMED Doppler Interferometer Measurements of Neutral Winds at the Mesosphere and Lower Thermosphere and Comparison to Meteor Radar Winds Open
The mesosphere and lower thermosphere (MLT) is a highly variable region that forms the transition region between middle and upper atmosphere. The variability of this region is driven by atmospheric waves transporting energy and momentum fr…
View article: Gravity waves generated by the Hunga Tonga–Hunga Ha′apai volcanic eruption and their global propagation in the mesosphere/lower thermosphere observed by meteor radars and modeled with the High-Altitude general Mechanistic Circulation Model
Gravity waves generated by the Hunga Tonga–Hunga Ha′apai volcanic eruption and their global propagation in the mesosphere/lower thermosphere observed by meteor radars and modeled with the High-Altitude general Mechanistic Circulation Model Open
The Hunga Tonga–Hunga Ha′apai volcano erupted on 15 January 2022, launching Lamb waves and gravity waves into the atmosphere. In this study, we present results using 13 globally distributed meteor radars and identify the volcanogenic gravi…
View article: Statistics of Traveling Ionospheric Disturbances at High Latitudes Using a Rapid‐Run Ionosonde
Statistics of Traveling Ionospheric Disturbances at High Latitudes Using a Rapid‐Run Ionosonde Open
The potential of deep learning for the investigation of medium scale traveling ionospheric disturbances (MSTIDs) has been exploited through the Sodankylä rapid‐run ionosonde in this statistical study. The complementing observations of the …
View article: Comment on egusphere-2023-1714
Comment on egusphere-2023-1714 Open
Abstract. The Hunga Tonga-Hunga Ha‘apai volcano erupted on 15th January 2022, launching Lamb waves and gravity waves into the atmosphere. In this study, we present results using 13 globally distributed meteor radars and identify the volcan…
View article: Inferring neutral winds in the ionospheric transition region from atmospheric-gravity-wave traveling-ionospheric-disturbance (AGW-TID) observations with the EISCAT VHF radar and the Nordic Meteor Radar Cluster
Inferring neutral winds in the ionospheric transition region from atmospheric-gravity-wave traveling-ionospheric-disturbance (AGW-TID) observations with the EISCAT VHF radar and the Nordic Meteor Radar Cluster Open
Atmospheric gravity waves and traveling ionospheric disturbances can be observed in the neutral atmosphere and the ionosphere at a wide range of spatial and temporal scales. Especially at medium scales, these oscillations are often not res…
View article: Gravity waves generated by the Hunga Tonga-Hunga Ha‘apai volcanic eruption and their global propagation in the mesosphere/lower thermosphere observed by meteor radars and modeled with the High-Altitude General Mechanistic Circulation Model
Gravity waves generated by the Hunga Tonga-Hunga Ha‘apai volcanic eruption and their global propagation in the mesosphere/lower thermosphere observed by meteor radars and modeled with the High-Altitude General Mechanistic Circulation Model Open
The Hunga Tonga-Hunga Ha‘apai volcano erupted on 15th January 2022, launching Lamb waves and gravity waves into the atmosphere. In this study, we present results using 13 globally distributed meteor radars and identify the volcanic-caused …
View article: Influence of Atmospheric Circulation on Orientation of Auroral Arcs
Influence of Atmospheric Circulation on Orientation of Auroral Arcs Open
We investigated statistically the orientation of about 10,000 auroral arcs observed during 2016–2021 in Abisko (68.36°N, 18.81°E, Sweden) in the equatorward part of the nightside auroral oval. The observations were made between 19 and 06 m…
View article: Statistics of traveling ionospheric disturbances at high latitudes using a rapid-run Ionosond
Statistics of traveling ionospheric disturbances at high latitudes using a rapid-run Ionosond Open
The potential of deep learning for the investigation of medium scale traveling ionospheric disturbances (MSTIDs) have been exploited through the Sodankylä rapid-run ionosonde in this statistical study. The complementing observations of th…
View article: Identifying gravity waves launched by the Hunga Tonga–Hunga Ha′apai volcanic eruption in mesosphere/lower-thermosphere winds derived from CONDOR and the Nordic Meteor Radar Cluster
Identifying gravity waves launched by the Hunga Tonga–Hunga Ha′apai volcanic eruption in mesosphere/lower-thermosphere winds derived from CONDOR and the Nordic Meteor Radar Cluster Open
The Hunga Tonga–Hunga Ha′apai volcano eruption was a unique event that caused many atmospheric phenomena around the globe. In this study, we investigate the atmospheric gravity waves in the mesosphere/lower-thermosphere (MLT) launched by t…
View article: Inferring neutral winds in the ionospheric transition region from AGW-TID observations with the EISCAT VHF radar and the Nordic Meteor Radar Cluster
Inferring neutral winds in the ionospheric transition region from AGW-TID observations with the EISCAT VHF radar and the Nordic Meteor Radar Cluster Open
Atmospheric Gravity Waves and Traveling Ionospheric Disturbances can be observed in the neutral atmosphere and the ionosphere at a wide range of spatial and temporal scales. Especially at medium scales, these oscillations are often not res…
View article: Inferring neutral winds in the ionospheric transition region from AGW-TID observations with the EISCAT VHF radar and the Nordic Meteor Radar Cluster
Inferring neutral winds in the ionospheric transition region from AGW-TID observations with the EISCAT VHF radar and the Nordic Meteor Radar Cluster Open
[Dataset] Inferring neutral winds in the ionospheric transition region from AGW-TID observations with the EISCAT VHF radar and the Nordic Meteor Radar Cluster
View article: Inferring neutral winds in the ionospheric transition region from AGW-TID observations with the EISCAT VHF radar and the Nordic Meteor Radar Cluster
Inferring neutral winds in the ionospheric transition region from AGW-TID observations with the EISCAT VHF radar and the Nordic Meteor Radar Cluster Open
[Dataset] Inferring neutral winds in the ionospheric transition region from AGW-TID observations with the EISCAT VHF radar and the Nordic Meteor Radar Cluster
View article: Comment on egusphere-2022-1370
Comment on egusphere-2022-1370 Open
Abstract. The Hunga Tonga-Hunga Ha‘apai volcano eruption was a unique event that caused many atmospheric phenomena around the globe. In this study, we investigate the atmospheric gravity waves in the mesosphere/lower thermosphere (MLT) lau…
View article: Comment on egusphere-2022-1370
Comment on egusphere-2022-1370 Open
Abstract. The Hunga Tonga-Hunga Ha‘apai volcano eruption was a unique event that caused many atmospheric phenomena around the globe. In this study, we investigate the atmospheric gravity waves in the mesosphere/lower thermosphere (MLT) lau…
View article: Gravity wave signatures in mesospheric/lower thermospheric winds caused by Hunga Tonga-Hunga Ha‘apai volcanic eruption identified by CONDOR and the Nordic Meteor Radar Cluster
Gravity wave signatures in mesospheric/lower thermospheric winds caused by Hunga Tonga-Hunga Ha‘apai volcanic eruption identified by CONDOR and the Nordic Meteor Radar Cluster Open
Gravity waves are a major source of the middle atmospheric short-term variability. The Hunga Tonga-Hunga Ha‘apai volcanic eruption provided a unique opportunity to study gravity wave propagation around the globe from a well-defined s…
View article: HSS/CIR driven storm effects on the ionosphere-thermosphere system
HSS/CIR driven storm effects on the ionosphere-thermosphere system Open
Solar wind interactions with the Earth’s magnetosphere cause geomagnetic storms and thereby induce ionospheric storms. This study investigates the spatio-temporal evolution of the ionospheric Total Electron Content (TEC) during a mod…
View article: Combined measurements with the EISCAT radar and the Nordic Meteor Radar Cluster to determine AGW-TID wave parameters
Combined measurements with the EISCAT radar and the Nordic Meteor Radar Cluster to determine AGW-TID wave parameters Open
Atmospheric Gravity Waves (AGWs) forced in the lower atmosphere are known to have a significant impact on the mesosphere and lower thermosphere (MLT) region. In the ionosphere, they can generate Medium-Scale Traveling Ionospheric Disturban…