| 1. Identity statement | ||||
| Reference Type | Journal Article | |||
| Site | mtc-m21c.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34R/3QTFKHH | |||
| Repository | sid.inpe.br/mtc-m21c/2018/04.16.13.46 | |||
| Last Update | 2018:08.06.16.10.53 (UTC) simone | |||
| Metadata Repository | sid.inpe.br/mtc-m21c/2018/04.16.13.46.15 | |||
| Metadata Last Update | 2022:03.18.22.15.04 (UTC) administrator | |||
| Secondary Key | INPE--PRE/ | |||
| DOI | 10.5194/angeo-36-899-2018 | |||
| ISSN | 0992-7689 | |||
| Citation Key | EssienWrPaMeBuTa:2018:SeChSm | |||
| Title | Seasonal characteristics of small- and medium-scale gravity waves in the mesosphere and lower thermosphere region over brazilian equatorial region  | |||
| Year | 2018 | |||
| Month | jun. | |||
| Access Date | 2024, Apr. 26 | |||
| Type of Work | journal article | |||
| Secondary Type | PRE PI | |||
| Number of Files | 1 | |||
| Size | 7021 KiB | |||
| 2. Context | ||||
| Author | 1 Essien, Patrick 2 Wrasse, Cristiano Max 3 Paulino, I. 4 Medeiros, A. F. 5 Buriti, R. A. 6 Takahashi, Hisao | |||
| Resume Identifier | 1 2 3 4 5 6 8JMKD3MGP5W/3C9JHCM | |||
| Group | 1 GESATM-CEA-SESPG-INPE-MCTIC-GOV-BR 2 DIDAE-CGCEA-INPE-MCTIC-GOV-BR | |||
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Universidade Federal de Campina Grande (UFCG) 4 Universidade Federal de Campina Grande (UFCG) 5 Universidade Federal de Campina Grande (UFCG) 6 Instituto Nacional de Pesquisas Espaciais (INPE) | |||
| Author e-Mail Address | 1 patrick.essien@inpe.br 2 cristiano.wrasse@inpe.br | |||
| Journal | Annales Geophysicae | |||
| Volume | 36 | |||
| Number | 3 | |||
| Pages | 899-914 | |||
| Secondary Mark | A2_INTERDISCIPLINAR A2_GEOCIÊNCIAS A2_ENGENHARIAS_I B2_CIÊNCIAS_BIOLÓGICAS_I B2_ASTRONOMIA_/_FÍSICA | |||
| History (UTC) | 2018-04-16 13:46:40 :: simone -> administrator :: 2018 2018-04-18 05:03:01 :: administrator -> administrator] :: 2018 2018-04-18 05:03:01 :: administrator] -> administrator :: 2018 2018-08-06 16:09:42 :: administrator -> simone :: 2018 2018-08-06 16:10:53 :: simone -> administrator :: 2018 2018-08-06 16:10:57 :: administrator -> simone :: 2018 2018-08-06 16:11:12 :: simone -> administrator :: 2018 2022-03-18 22:15:04 :: administrator -> simone :: 2018 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Content Type | External Contribution | |||
| Version Type | publisher | |||
| Keywords | Atmospheric composition and structure (airglow and aurora) – electromagnetics (wave propagation) – history of geophysics (atmospheric sciences) | |||
| Abstract | This work reports the seasonal characteristics of small- and medium-scale gravity waves in the mesosphere and lower thermosphere region observed in the OH NIR airglow images over Sao Joao do Cariri (7.4oS, 36.5oW). Observations were made from September 2000 to December 2010, which corresponded to a total of 1496 nights. To investigate medium-scale gravity waves, sequences of images observed in each night was used to create 701 keograms. Two techniques were used to calculate for gravity waves parameters: Keo-FFT analysis for medium-scale gravity waves (MSGWs) and Fourier cross spectrum for small-scale gravity waves (SSGWs). The two analytical techniques resulted in 537 and 2343 MSGWs and SSGWs events respectively. The horizontal wavelengths of MSGWs were concentrated between 100 to 150 km, while that of the SSGWs were between 10 to 15 km. The observed periods for MSGWs ranged from 20 to 40 minutes, while the SSGWs had a maximum peak around 5 to 10 min. The observed horizontal phase speed of MSGWs was distributed between 60 to 80 10 m/s while the SSGWs showed a peak around 20 to 40 m/s. Except spring, which the wave events propagated in all directions, in summer, fall and winter were northeast and southeast. The horizontal propagation direction of MSGWs and SSGWs show clear seasonal variations based on the influence of the background atmospheric conditions such as wind. The anisotropy observed in the total propagation directions of MSGWs was northeast which can be attributed to either the source location of the gravity waves or the filtering process due to the wind system which depends fundamentally on the seasonal variations. However, there was no clear anisotropy in the total propagation direction of the SSGWs which could be due to uniformly distribution of the sources or filtering processes by the wind system. Critical level theory for gravity wave filtering was applied to study the effects of middle atmospheric winds on the propagation path of the wave events while the average of daily mean Outgoing Long-wave Radiation (OLR) was used to study the possible seeding mechanism of the gravity waves. The SSGWs were found to be filtered out by the mean flow due to their least phase velocities. Deep Convection is the possible seeding mechanism for both MSGWs and SSGWs in the summer and fall over the Brazilian equatorial sector. MSGWs were found to be less susceptible to wind filtering effects due to their high phase velocities. | |||
| Area | CEA | |||
| Arrangement 1 | urlib.net > Produção anterior à 2021 > DIDAE > Seasonal characteristics of... | |||
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção pgr ATUAIS > GES > Seasonal characteristics of... | |||
| doc Directory Content | access | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| data URL | http://urlib.net/ibi/8JMKD3MGP3W34R/3QTFKHH | |||
| zipped data URL | http://urlib.net/zip/8JMKD3MGP3W34R/3QTFKHH | |||
| Language | en | |||
| Target File | essien_seasonal.pdf | |||
| User Group | simone | |||
| Reader Group | administrator simone | |||
| Visibility | shown | |||
| Archiving Policy | allowpublisher allowfinaldraft | |||
| Read Permission | allow from all | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Next Higher Units | 8JMKD3MGPCW/3ETL868 8JMKD3MGPCW/3F2PBEE | |||
| Citing Item List | sid.inpe.br/bibdigital/2013/09.29.20.43 3 sid.inpe.br/bibdigital/2013/10.12.21.02 1 | |||
| Dissemination | WEBSCI; PORTALCAPES; COMPENDEX; SCOPUS. | |||
| Host Collection | urlib.net/www/2017/11.22.19.04 | |||
| 6. Notes | ||||
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress format isbn label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project rightsholder schedulinginformation secondarydate session shorttitle sponsor subject tertiarymark tertiarytype url | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||