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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...
Ionospheric trends in Southern Hemisphere stations due to the increasing greenhouse gases concentration
Ionospheric trend EUV proxies Forecasts Dynamics
2015/8/14
The lower and middle atmosphere present long-term variations in temperature and other parameters linked to anthropogenic sources, such as the increase in greenhouse gases concentration since the start...
Degradation of buried ice and permafrost in the Veleta cirque (Sierra Nevada, Spain) from 2006 to 2013 as a response to recent climate trends
Veleta cirque du soleil the sierra Nevada mountains national park the quaternary cold ice age the glacier
2015/1/6
The Veleta cirque is located at the foot of the Veleta peak, one of the highest summits of the Sierra Nevada National Park (southern Spain). This cirque was the source of a glacier valley during the Q...
Spatial and temporal trends for water-fl ow velocity and bed-material sediment transport in the lower Mississippi River
Spatial and temporal trends water-fl ow velocity bed-material sediment transport the lower Mississippi River
2014/4/8
Where rivers near the coastline, the receiving basin begins to infl uence fl ow, and gradually varied, nonuniform fl ow conditions arise. The section of the river affected by nonuniform fl ow is typic...
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...
Continuous partial trends and low-frequency oscillations of time series
Continuous partial trends low-frequency oscillations time series
2009/11/9
This paper presents a recent methodology developed for the analysis of the slow evolution of geophysical time series. The method is based on least-squares fitting of continuous line segments to the da...
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...