About: Trends in the ionospheric D and E regions using results of different radio propagation experiments.

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Long-term trends in the ionospheric D and E regions have been derived from different ground-based radio propagation experiments. The reflection height observations show decreasing trends resulting in a shrinking of the lower ionosphere and atmosphere during the last decades. The trends of the absorption data., however, are more complex. For a very long LF path with a reflection height below 80 km a positive trend was observed. For LF absorption measurements with reflection heights between about 80 - 90 km negative trends were derived whereas for reflection heights above about 90 km (mainly absorption in the MF and HF ranges) again positive absorption trends were estimated. From ionosonde observations it can be shown that the maximum electron density of the E layer has been increased during the last decades. All these features can qualitatively be explained by an increasing atmospheric greenhouse effect with a strato- and mesospheric cooling as well as a decreasing density of nitric oxide and an increa Long-term trends in the ionospheric D and E regions have been derived from different ground-based radio propagation experiments. The reflection height observations show decreasing trends resulting in a shrinking of the lower ionosphere and atmosphere during the last decades. The trends of the absorption data., however, are more complex. For a very long LF path with a reflection height below 80 km a positive trend was observed. For LF absorption measurements with reflection heights between about 80 - 90 km negative trends were derived whereas for reflection heights above about 90 km (mainly absorption in the MF and HF ranges) again positive absorption trends were estimated. From ionosonde observations it can be shown that the maximum electron density of the E layer has been increased during the last decades. All these features can qualitatively be explained by an increasing atmospheric greenhouse effect with a strato- and mesospheric cooling as well as a decreasing density of nitric oxide and an increa (en)
Title	Trends in the ionospheric D and E regions using results of different radio propagation experiments. Trends in the ionospheric D and E regions using results of different radio propagation experiments. (en)
skos:prefLabel	Trends in the ionospheric D and E regions using results of different radio propagation experiments. Trends in the ionospheric D and E regions using results of different radio propagation experiments. (en)
skos:notation	RIV/68378289:_____/03:04033523!RIV/2004/AV0/A04004/N
http://linked.open.../vavai/riv/strany	X1-X5
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(OC 271.10), Z(AV0Z3042911)
http://linked.open...vai/riv/dodaniDat	2004
http://linked.open...aciTvurceVysledku	Laštovička, Jan
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky atmosféry AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	631475
http://linked.open...ai/riv/idVysledku	RIV/68378289:_____/03:04033523
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	trends; ionosphere (en)
http://linked.open.../riv/klicoveSlovo	ionosphere trends
http://linked.open...ontrolniKodProRIV	[CD30D4900D19]
http://linked.open...v/mistoKonaniAkce	Faro [PT]
http://linked.open...i/riv/mistoVydani	Oxford
http://linked.open...i/riv/nazevZdroje	Communications COST 271: Effects of the upper atmosphere on terrestrial and Earth-space.
http://linked.open...in/vavai/riv/obor	DG
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
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http://linked.open...vavai/riv/projekt	http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20271.10
http://linked.open...UplatneniVysledku	2003
http://linked.open...iv/tvurceVysledku	Laštovička, Jan Bremer, J.
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2003-10-02 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Investigations of selected processes in the Earth's atmosphere
number of pages	1 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Appleton-Rutherford Laboratory

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