About: Evidence of long-term change in zonal wind in the tropical lower mesosphere: Observations and model simulations

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About: Evidence of long-term change in zonal wind in the tropical lower mesosphere: Observations and model simulations Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	In recent years, the mesosphere (50 to 85–100 km) has evoked great scientific interest as long-term changes due to global warming can be clearly captured due to the large perturbation amplitudes at these altitudes. In the present study, zonal wind observations between 70 and 80 km over the Indian region provided by rocketsonde (1977–1991), HRDI/UARS (1991–1999), and MST radar (1995–2010) are used to construct a long-term data set from 1977 to 2010. Using this unprecedented data set, a decreasing trend of 2 m/s/yr is found, changing from strong eastward winds during the 1970s to weak westward winds in recent years. On the other hand, between 80 and 98 km using medium frequency radar observations during 1993–2009, no perceptible trend is found. Simulations of NCAR TIME-GCM also showed a similar change in the circulation when CO2 in the atmosphere is doubled, suggesting role of anthropogenic changes in the dynamics of the mesosphere. In recent years, the mesosphere (50 to 85–100 km) has evoked great scientific interest as long-term changes due to global warming can be clearly captured due to the large perturbation amplitudes at these altitudes. In the present study, zonal wind observations between 70 and 80 km over the Indian region provided by rocketsonde (1977–1991), HRDI/UARS (1991–1999), and MST radar (1995–2010) are used to construct a long-term data set from 1977 to 2010. Using this unprecedented data set, a decreasing trend of 2 m/s/yr is found, changing from strong eastward winds during the 1970s to weak westward winds in recent years. On the other hand, between 80 and 98 km using medium frequency radar observations during 1993–2009, no perceptible trend is found. Simulations of NCAR TIME-GCM also showed a similar change in the circulation when CO2 in the atmosphere is doubled, suggesting role of anthropogenic changes in the dynamics of the mesosphere. (en)
Title	Evidence of long-term change in zonal wind in the tropical lower mesosphere: Observations and model simulations Evidence of long-term change in zonal wind in the tropical lower mesosphere: Observations and model simulations (en)
skos:prefLabel	Evidence of long-term change in zonal wind in the tropical lower mesosphere: Observations and model simulations Evidence of long-term change in zonal wind in the tropical lower mesosphere: Observations and model simulations (en)
skos:notation	RIV/68378289:_____/13:00390589!RIV13-AV0-68378289
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP209/10/1792)
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Laštovička, Jan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
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	73763
http://linked.open...ai/riv/idVysledku	RIV/68378289:_____/13:00390589
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	mesosphere; zonal wind; long-term trends; TIME-GCM; climate change (en)
http://linked.open.../riv/klicoveSlovo	long-term trends mesosphere climate change TIME-GCM zonal wind
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[21D39A62B9D1]
http://linked.open...i/riv/nazevZdroje	Geophysical Research Letters
http://linked.open...in/vavai/riv/obor	DG
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Long-term changes in the atmosphere-ionosphere system
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	40
http://linked.open...iv/tvurceVysledku	Laštovička, Jan Qian, L. Kumar, G. K. Murthy, B. V. K. Rao, N. V. Ratnam, M. V.
http://linked.open...ain/vavai/riv/wos	000317829300031
issn	0094-8276
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1002/grl.50158

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