Meteorological Control of the D Region

Taubenheim, J.

doi:10.1007/978-94-009-7096-0_31

Cited by 9 publications

(14 citation statements)

References 22 publications

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“…wind field and insolation. Unfortunately, this problem is not well addressed in geophysical statistical analysis besides the basic paper by Bartels (1935), cited in Taubenheim (1969). If, however, one aims more at quantifying the imprint of other factors upon the general dependency of the slope factors on F i than investigating an artificial correlation between variables that are quite obviously not independent, then the parameter estimates presented here remain meaningful.…”

Section: Discussionmentioning

confidence: 97%

Empirical evaluation of an extended similarity theory for the stably stratified atmospheric surface layer

Sodemann

Foken

2004

Quart J Royal Meteoro Soc

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SUMMARYThe theory of the atmospheric stable boundary layer (SBL) has recently been extended by a distinction between nocturnal and long-lived SBLs. The latter SBL type, which includes influences from the free atmosphere on fluxes in the surface layer, requires a modification of the traditional Monin-Obukhov similarity theory. In the present study, the applicability of this extended theory for long-lived SBLs is evaluated and the required coefficients are estimated using data from Antarctica.Changes in wind and temperature gradients due to different weather conditions are shown to exert a strong influence on the estimation of the new coefficients C uN and C θN . Using the wind gradient as classification criterion, the momentum flux coefficient C uN is estimated to range between 0.51 ± 0.03 and 2.26 ± 0.08. Using the temperature gradient as classification criterion, the heat flux coefficient C θN is estimated to range between 0.022 ± 0.002 and 0.040 ± 0.001.At present, the proposed new scaling theory is still in a preliminary stage. Possible future improvements should take into account factors influencing the wind and temperature gradients, such as weather conditions. An artificial background correlation strongly imprints upon the parameter estimation, suggesting that both the methodology for estimating the new coefficients C uN and C θN and the choice of the nondimensional variables for this extended scaling theory may require some revision.

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Section: Discussionmentioning

confidence: 97%

Empirical evaluation of an extended similarity theory for the stably stratified atmospheric surface layer

Sodemann

Foken

2004

Quart J Royal Meteoro Soc

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“…During the solar minimum, the photoionization rate of NO is reduced and the altitude of the reflection height for long radio waves is higher than during periods of solar maximum. Furthermore, stratospheric processes are also known to control the variability of the electron density in the D region due to shrinking of the colder stratosphere, which causes a downwelling of the mesosphere with higher number of electrons at a fixed altitude (Murgatroyd and Singleton, 1961;Taubenheim, 1983;Garcia et al, 1987). An additional shrinking of the mesosphere due to cooling of the mesosphere is also reported (e.g., Akmaev et al 2006;Lü bken et al, 2013).…”

Section: Introductionmentioning

confidence: 94%

Long-term variability of 50years of standard phase-height measurement at Kühlungsborn, Mecklenburg, Germany

Peters

Entzian

2015

Advances in Space Research

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“…The negative correlation between Voy and dfm;n (Fig. 2) suggest the idea about increased transport of NO into D-region from the higher latitudes, which may be the reason of absorption increase (Taubenheim, 1983).…”

Section: Discussionmentioning

confidence: 84%

“…There are some speculative schemes of the relationship between D-region ionospheric absorption of radiowaves (including the well known winter anomaly) and lower thermosphere winds (Offerman et al, 1982;Taubenheim, 1983).…”

Section: Introductionmentioning

confidence: 99%

Relationship between the Radio Wave Absorption and Horizontal Winds in the Lower Ionosphere over East Siberia.

Vergasova

Kazimirovsky

Kokourov

et al. 1995

J. geomagn. geoelec

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The horizontal wind field in the ionospheric D-region belongs to important parameter related to ionospheric radio wave absorption. The analysis of continuous ionospheric vertical radio sounding and wind measurements by the spaced receiver method in low-frequency range (Irkutsk, East Siberia 1975) is applicated to define the possible coupling of absorption and dynamics in their seasonal and yearto-year dependence. For the analysis we used parameter dfmin =fmin -fmin median, prevailing winds, amplitudes and phases of semidiumal tides for zonal and meridional winds. For some seasons there are significant but changeable correlations between dfmin and prevailing wind. In most cases especially in winter the changes of wind outstrip the changes of absorption. Quasi-periodic fluctuations with planetary wave periods (18-30 days) exist in winter for both. The periodicity close to 27 days (26-30 days) exists for all seasons and all parameters. Application of correloperiodogram analysis reveals the response of ionospheric absorption to the dynamical processes, quantitatively depending on the solar and geomagnetic activity.

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Meteorological Control of the D Region

Cited by 9 publications

References 22 publications

Empirical evaluation of an extended similarity theory for the stably stratified atmospheric surface layer

Empirical evaluation of an extended similarity theory for the stably stratified atmospheric surface layer

Long-term variability of 50years of standard phase-height measurement at Kühlungsborn, Mecklenburg, Germany

Relationship between the Radio Wave Absorption and Horizontal Winds in the Lower Ionosphere over East Siberia.

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