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Long term trends in stratospheric temperature using NCEP/NCAR data
(Elsevier, 2016-11)
The stratospheric temperature trend plays an important role in distinguishing between the climate systems responses to natural and human induced changes. A linear trend of monthly mean temperature from the NCEP/NCAR ...
foF2 long-term trends at the southern crest of the equatorial anomaly
(Elsevier Ltd., 2006-12)
Long-term trends in the electron density of the ionosphere for the period 1957-1986 is studied using foF2 monthly median hourly data measured at Tucuman (26.9S, 65.4W), a station located at the southern crest of the ...
Effect of the Inclusion of Solar Cycle 24 in the Calculation of foF2 Long-Term Trend for Two Japanese Ionospheric Stations
(Birkhauser Verlag Ag, 2019-08)
One of the main ionization sources of the F2 region of the Earth’s ionosphere is the solar EUV irradiance accounting for * 90% of its variability during quiet time. Consequently, prior to long-term trend estimations solar ...
Trends in the F2 ionospheric layer due to long-term variations in the Earth's magnetic field
(Elsevier, 2009-06)
The Earth's magnetic field presents long-term variations with changes in strength and orientation. Particularly, changes in the dip angle (I) and, consequently, in the sin(I)cos(I) factor, affect the thermospheric neutral ...
Discrete wavelet analysis to assess long-term trends in geomagnetic activity
(Elsevier Ltd., 2006-12)
To assess long-term trends in geomagnetic activity, the discrete wavelet transform using the Daubechies function was applied to aa and Dst for periods 1868–2003 and 1957–2003 respectively.Among a variety of techniques ...
Incidence of solar cycle 24 in nighttime foF2 long-term trends for two Japanese ionospheric stations
(Springer, 2020-06)
Ionospheric long-term trend studies are of great scientific interest since they contribute to the more general and controversial climatic change issue. In this paper we analyze the effect of the inclusion of solar cycle ...
Earth magnetic field and geomagnetic activity effects on long-term trends in the F2 layer at mid-high latitudes
(Elsevier, 2006-12)
It is well known that the Earth magnetic field, as well as geomagnetic activity, presents long-term variations.Both phenomena affect the height of the F2 layer peak, hmF2, and the maximum electron concentration estimated ...
The Secular Trend of Brazilian Terms of Trade Revisited - 1850 to 2000The Secular Trend of Brazilian Terms of Trade Revisited - 1850 to 2000
(Sociedade Brasileira de Econometria, 2003)
Stratospheric Temperature Trends Between 10 and 70 hPa During the Period 1948-2009
(Bentham Science Publishers, 2011-02)
Trends in zonal mean temperatures between 10 and 70 hPa have been assessed for the period 1948-2009 using zonal monthly mean temperature from the NCEP/NCAR reanalysis dataset. Monthly temperature linear trends were calculated ...
Possible sources of long-term variations in the mid-latitude ionosphere
(Bentham open, 2011-10)
Trends in the upper atmosphere, together with the global warming of the lower atmosphere, are part of the global change of the Earth system. In the present work, which is focused in the upper atmosphere, long-term variations ...