<?xml version="1.0" encoding="ISO-8859-1"?>
<metadatalist>
	<metadata ReferenceType="Journal Article">
		<site>mtc-m16.sid.inpe.br 800</site>
		<holdercode>{isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}</holdercode>
		<identifier>6qtX3pFwXQZsFDuKxG/AKcha</identifier>
		<repository>sid.inpe.br/marciana/2004/01.12.10.20</repository>
		<lastupdate>2014:06.18.16.31.49 sid.inpe.br/banon/2003/08.15.17.40 administrator</lastupdate>
		<metadatarepository>sid.inpe.br/marciana/2004/01.12.10.20.33</metadatarepository>
		<metadatalastupdate>2018:06.05.01.20.43 sid.inpe.br/banon/2003/08.15.17.40 administrator {D 2003}</metadatalastupdate>
		<secondarykey>INPE-10758-PRE/6216</secondarykey>
		<doi>10.1029/2002JD002593</doi>
		<issn>0148-0227</issn>
		<issn>2156-2202</issn>
		<citationkey>MedeirosTayTakBatGob:2003:PrDiWi</citationkey>
		<title>An investigation of gravity wave activity in the low-latitude upper mesosphere: Propagation direction and wind filtering</title>
		<year>2003</year>
		<month>July</month>
		<typeofwork>journal article</typeofwork>
		<secondarytype>PRE PI</secondarytype>
		<numberoffiles>1</numberoffiles>
		<size>555 KiB</size>
		<author>Medeiros, Amauri Fragoso de,</author>
		<author>Taylor, Michael J.,</author>
		<author>Takahashi, Hisao,</author>
		<author>Batista, Paulo Prado,</author>
		<author>Gobbi, Delano,</author>
		<group></group>
		<group></group>
		<group>DAE-INPE-MCT-BR</group>
		<group>DAE-INPE-MCT-BR</group>
		<group>DAE-INPE-MCT-BR</group>
		<affiliation>Universidade Federal Campina Grande (UFCG)</affiliation>
		<affiliation>Utah State University</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<electronicmailaddress>afragoso@df.ufpb.br</electronicmailaddress>
		<electronicmailaddress>michael.taylor@usu.edu</electronicmailaddress>
		<electronicmailaddress>hisaotak@laser.inpe.br</electronicmailaddress>
		<electronicmailaddress>ppbatista@laser.inpe.br</electronicmailaddress>
		<electronicmailaddress>delanogobbi@laser.inpe.br</electronicmailaddress>
		<journal>Journal of Geophysical Research</journal>
		<volume>108</volume>
		<number>D14</number>
		<pages>4411 (8pp.)</pages>
		<transferableflag>1</transferableflag>
		<contenttype>External Contribution</contenttype>
		<versiontype>publisher</versiontype>
		<keywords>airglow, winds, gravity waves, wind filtering, imager, nightglow emissions, critical level, shear flow, airglow, atmosphere, spectra, middle.</keywords>
		<abstract>An all-sky charge-coupled device imager capable of measuring wave structure in the OH, O-2, and O I (557.7 nm) airglow emissions was operated at Cachoeira Paulista, Brazil (23degreesS, 45degreesW), for 2 years in collaboration with Utah State University, Logan. The dominant quasi-monochromatic gravity wave components investigated over a similar to1 year period (September 1998 to October 1999) have been extracted, and their seasonal variations have been measured. A total of 283 wave events were measured, exhibiting horizontal wavelengths from 5 to 60 km, observed periods from 5 to 35 min, and horizontal phase speeds of up to similar to80 m s(-1). The large-scale "band'' wave patterns (horizontal wavelength between 10 and 60 km) exhibited a clear seasonal dependence on the horizontal propagation direction, propagating toward the southeast during the summer months and toward the northwest during the winter. The direction of propagation was observed to change abruptly around the equinox period in mid March and at the end of September. Using a numerical simulation of gravity wave propagation in a seasonally variable climatological wind field, we have determined that the observed anisotropy in the wave propagation directions can be attributed to a strong filtering of the waves in the middle atmosphere by stratospheric winds.</abstract>
		<area>CEA</area>
		<language>en</language>
		<targetfile>jgrd9984.pdf</targetfile>
		<usergroup>administrator</usergroup>
		<usergroup>banon</usergroup>
		<usergroup>marciana</usergroup>
		<readergroup>administrator</readergroup>
		<readergroup>marciana</readergroup>
		<visibility>shown</visibility>
		<copyholder>SID/SCD</copyholder>
		<archivingpolicy>denypublisher6 allowfinaldraft</archivingpolicy>
		<documentstage>not transferred</documentstage>
		<nexthigherunit>8JMKD3MGPCW/3ETL868</nexthigherunit>
		<dissemination>WEBSCI; AGU; MGA; COMPENDEX.</dissemination>
		<hostcollection>sid.inpe.br/banon/2003/08.15.17.40</hostcollection>
		<username>marciana</username>
		<lasthostcollection>sid.inpe.br/banon/2003/08.15.17.40</lasthostcollection>
		<url>http://mtc-m16.sid.inpe.br/rep-/sid.inpe.br/marciana/2004/01.12.10.20</url>
	</metadata>
</metadatalist>