Print Email Facebook Twitter Characterization of Thermospheric Vertical Wind Activity at 225- to 295-km Altitude Using GOCE Data and Validation Against Explorer Missions Title Characterization of Thermospheric Vertical Wind Activity at 225- to 295-km Altitude Using GOCE Data and Validation Against Explorer Missions Author Visser, T. (TU Delft Astrodynamics & Space Missions) March, G. (TU Delft Astrodynamics & Space Missions) Doornbos, E.N. (TU Delft Astrodynamics & Space Missions) de Visser, C.C. (TU Delft Control & Simulation) Visser, P.N.A.M. (TU Delft Astrodynamics & Space Missions) Date 2019 Abstract Recently, the horizontal and vertical cross wind at 225- to 295-km altitude were derived from linear acceleration measurements of the Gravity field and steady-state Ocean Circulation Explorer satellite. The vertical component of these wind data is compared to wind data derived from the mass spectrometers of the Atmosphere Explorer C and E and Dynamics Explorer 2 satellites. From a statistical analysis of the 120-s moving-window standard deviation of the vertical wind (σ(Vz)), no consistent discrepancy is found between the accelerometer-derived and the mass spectrometer-derived data. The validated Gravity field and steady-state Ocean Circulation Explorer data are then used to investigate the influence of several parameters and indices on the vertical wind activity. To this end, the probability distribution of σ(Vz) is plotted after distributing the data over bins of the parameter under investigation. The vertical wind is found to respond strongly to geomagnetic activity at high latitudes, although the response settles around a maximum standard deviation of 50 m/s at an Auroral Electrojet index of 800. The dependence on magnetic local time changes with magnetic latitude, peaking around 4:30 over the polar cap and around 01:30 and 13:30 in the auroral oval. Seasonal effects only become visible at low to middle latitudes, revealing a peak wind variability in both local summer and winter. The vertical wind is not affected by the solar activity level. Subject Atmosphere ExplorersDynamics Explorer 2Gravity field and steady-state Ocean Circulation Explorer (GOCE)thermospheric vertical wind To reference this document use: http://resolver.tudelft.nl/uuid:b87d2505-3c8f-4e4d-8ed6-bb36c8f29c73 DOI https://doi.org/10.1029/2019JA026568 ISSN 2169-9380 Source Journal Of Geophysical Research-Space Physics, 124 (6), 4852-4869 Part of collection Institutional Repository Document type journal article Rights © 2019 T. Visser, G. March, E.N. Doornbos, C.C. de Visser, P.N.A.M. Visser Files PDF Visser_et_al_2019_Journal ... hysics.pdf 3.9 MB Close viewer /islandora/object/uuid:b87d2505-3c8f-4e4d-8ed6-bb36c8f29c73/datastream/OBJ/view