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Long-term trends in f0 F2 over Grahamstown using Neural Networks
Solar activity magnetic activity
2015/9/25
Many authors have claimed to have found long-term trends in f0 F2 , or the lack thereof, for different stations. Such investigations usually involve gross assumptions about the variation of f0 F2 with...
Long-term trends in the ionosphere and upper atmosphere parameters
atmosphere parameters ionosphere
2015/9/14
The first part of the paper is directed to the investigation of the practical importance of possible longterm trends in the F2-layer for ionospheric prediction models. Using observations of about 50 d...
Peak Nothing: Recent Trends in Mineral Resource Production
Peak Nothing Recent Trends Mineral Resource Production Geophysics
2011/8/11
Abstract: The production histories of seventeen raw materials are analyzed with the logistic model. Although many of these resources have exhibited logistic behavior in the past, they now show exponen...
Atmospheric Trends Above Finland:II Troposphere and Stratosphere
Ozone temperature radiosoundings
2009/6/10
Long-term meteorological monitoring activities at Sodankylä (67°N, 26°E) in Northern Finland
are discussed. Observed time series of surface temperature, radiosoundings, solar radiation, and ozon...
Atmospheric Trends Above Finland:I Mesosphere and Thermosphere
Ionosphere global change evolution of the atmosphere ionosphere atmosphere interactions atmospheric composition and structure, atmosphere
2009/6/10
In the present study we analyse various long-term data series of measurements run by the
Sodankylä Geophysical Observatory for possible indications of cooling trends in the upper atmosphere.We r...