long-term hmf2 trends in the eurasian longitudinal sector from the ground-based ionosonde observations

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ID: 252770
2001
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Abstract
The method earlier used for the foF2 long-term trends analysis is applied to reveal hmF2 long-term trends at 27 ionosonde stations in the European and Asian longitudinal sectors. Observed M(3000)F2 data for the last 3 solar cycles are used to derive hmF2 trends. The majority of the studied stations show significant hmF2 linear trends with a confidence level of at least 95% for the period after 1965, with most of these trends being positive. No systematic variation of the trend magnitude with latitude is revealed, but some longitudinal effect does take place. The proposed geomagnetic storm concept to explain hmF2 long-term trends proceeds from a natural origin of the trends rather than an artificial one related to the thermosphere cooling due to the greenhouse effect.

Key words. Ionosphere (ionosphere-atmosphere interaction)
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marin2001annaleslong-term Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;D. Marin;A. V. Mikhailov;B. A. Morena;M. Herraiz
Journal journal of food measurement and characterization
Year 2001
DOI
10.5194/angeo-19-761-2001
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