mid-latitude summer nighttime anomaly (msna) – observations and model simulations

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ID: 212566
2011
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Abstract
In this paper, we present model simulations of the Mid-latitude Summer Nighttime Anomaly (MSNA) in the Northern Hemisphere, which is characterized by noon-time dip and evening maximum in the diurnal variation of the ionospheric density. The simulations are carried out using SUPIM (Sheffield University Plasmasphere Ionosphere Model) for solar minimum at 135° E longitude where MSNA is most pronounced in the Northern Hemisphere. The simulations are used to understand the relative importance of electric fields, and zonal and meridional winds in the formation of MSNA. The wind velocities measured by the Middle and Upper atmosphere radar (MU radar) and those obtained from the horizontal wind model (HWM93) are used. The results show that the formation of MSNA is closely related to the diurnal variation of the neutral winds with little contribution from the changes in the electric fields. The observed features of MSNA are better reproduced when MU radar winds are used as model input rather than HWM winds.
Reference Key
thampi2011annalesmid-latitude Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;S. V. Thampi;N. Balan;C. Lin;H. Liu;M. Yamamoto
Journal journal of food measurement and characterization
Year 2011
DOI
10.5194/angeo-29-157-2011
URL
https://www.ann-geophys.net/29/157/2011/angeo-29-157-2011.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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