| 1. Identity statement | ||||
| Reference Type | Conference Paper (Conference Proceedings) | |||
| Site | mtc-m21c.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34R/44JUSDP | |||
| Repository | sid.inpe.br/mtc-m21c/2021/04.30.18.17 | |||
| Last Update | 2021:04.30.18.17.11 (UTC) simone | |||
| Metadata Repository | sid.inpe.br/mtc-m21c/2021/04.30.18.17.11 | |||
| Metadata Last Update | 2022:04.03.22.29.11 (UTC) administrator | |||
| Secondary Key | INPE--PRE/ | |||
| DOI | 10.5194/egusphere-egu21-12971 | |||
| Citation Key | MortariniDAOBGSTAMC:2021:InAtSt | |||
| Title | Influence of Atmospheric Stability on the flow dynamics within and above a dense Amazonian forest  | |||
| Year | 2021 | |||
| Access Date | 2024, May 19 | |||
| Secondary Type | PRE CI | |||
| Number of Files | 1 | |||
| Size | 279 KiB | |||
| 2. Context | ||||
| Author | 1 Mortarini, Luca 2 Dias Júnior, Cléo Quaresma 3 Acevedo, Otavio 4 Oliveira, Pablo 5 Brondani, Daiane 6 Giostra, Umberto 7 Sörgel, Matthias 8 Tsokankunku, Anywhere 9 Araújo, Alessandro 10 Machado, Luiz Augusto Toledo 11 Cava, Daniela | |||
| Resume Identifier | 1 2 3 4 5 6 7 8 9 10 8JMKD3MGP5W/3C9JHMS | |||
| ORCID | 1 0000-0002-0543-2975 2 0000-0003-4783-4689 3 4 0000-0003-1172-6870 5 6 0000-0001-8399-8715 7 0000-0003-1745-8221 8 9 0000-0002-7361-5087 | |||
| Group | 1 2 3 4 5 6 7 8 9 10 DISSM-CGCT-INPE-MCTI-GOV-BR | |||
| Affiliation | 1 Institute of Atmospheric Sciences and Climate 2 Instituto Nacional de Pesquisas da Amazônia (INPA) 3 Universidade Federal de Santa Maria (UFSM) 4 Universidade Federal do Rio Grande do Norte (UFRN) 5 Instituto Nacional de Pesquisas da Amazônia (INPA) 6 Università degli Studi di Urbino “Carlo Bo” 7 Max Planck Institute for Chemistry 8 Max Planck Institute for Chemistry 9 Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) 10 Instituto Nacional de Pesquisas Espaciais (INPE) 11 Institute of Atmospheric Sciences and Climate | |||
| Author e-Mail Address | 1 2 3 4 5 6 7 8 9 10 Luiz.at.machado@gmail.com | |||
| Conference Name | EGU General Assembly | |||
| Conference Location | Online | |||
| Date | 19-30 apr. | |||
| Publisher | EGU | |||
| History (UTC) | 2021-04-30 18:17:12 :: simone -> administrator :: 2022-04-03 22:29:11 :: administrator -> simone :: 2021 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Content Type | External Contribution | |||
| Abstract | This study provides a detailed analysis of the influence of atmospheric stratification on the flow dynamics above and within a dense forest for a 19-days campaign at the Amazon Tall Tower Observatory (ATTO) site. Observations taken at seven levels within and above the forest along an 81-meter and a 325-meter towers allow a unique investigation of the vertical evolution of the turbulent field in the roughness sublayer and in the surface layer above it. Five different stability classes were defined on the basis of the behavior of turbulent heat, momentum and CO2 fluxes and variance ratio as a function of h/L stability parameter (where h is the canopy height and L is the Obukhov length). The novelty is the identification of a super-stable (SS) regime (h/L>3) characterized by extremely low wind speeds, the almost completely suppression of turbulence and a clear dominance of submeso motions both above and within the forest. The obtained data classification was used to study the influence of atmospheric stratification on the vertical profiles of turbulent statistics. The spectral characteristics of coherent structures and of submeso motions (that may influence the energy and mass exchange above the Amazon forest) have been analyzed by wavelet analyses. The role of the main structures in momentum, heat and CO2 transport at the different levels inside and above the forest and in different diabatic conditions was thoroughly investigated through multiresolution and quadrant analyses. In unstable and neutral stability, the flow above the canopy appears modulated by ejections, whereas downward and intermittent sweeps dominate the transport inside the canopy. In the roughness sublayer (z £ 2h) the coherent structures dominating the transport within and above the canopy have a characteristic temporal scale of about 100 sec, whereas above this layer the transport is mainly driven by larger scale convection (temporal scale of about 15 min). In stable conditions the height of roughness sublayer progressively decreases with increasing stability reaching the minimum value (z<1.35h) in the SS regime. Above the canopy the flow is clearly dominated by ejections but characterized by a higher intermittency mainly in SS conditions. On the other hand, the rapid shear stress absorption in the highest part of the vegetation produces a less clear dominance of sweeps and a less defined role of odd and even quadrants inside the canopy in the transport of momentum, heat and CO2. In the weakly stable regime (0.15<h/L<1) transport is dominated in the roughness sublayer by canopy coherent structures with a characteristic temporal scale of about 60 sec. As stability increases the influence of low-frequency (submeso) processes, with a temporal scale of 20-30 min, on flow dynamics progressively increases and becomes dominant in the SS regime where the buoyancy strongly dampens or completely inhibits turbulent structures whereas the large-scale oscillations propagate in the interior of the canopy modulating the heat and CO2 transport. | |||
| Area | MET | |||
| Arrangement | urlib.net > BDMCI > Fonds > Produção a partir de 2021 > CGCT > Influence of Atmospheric... | |||
| 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://mtc-m21c.sid.inpe.br/ibi/8JMKD3MGP3W34R/44JUSDP | |||
| zipped data URL | http://mtc-m21c.sid.inpe.br/zip/8JMKD3MGP3W34R/44JUSDP | |||
| Language | en | |||
| Target File | EGU21-12971-print.pdf | |||
| User Group | simone | |||
| Visibility | shown | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Next Higher Units | 8JMKD3MGPCW/46KUATE | |||
| Citing Item List | ||||
| Host Collection | urlib.net/www/2017/11.22.19.04 | |||
| 6. Notes | ||||
| Empty Fields | archivingpolicy archivist booktitle callnumber copyholder copyright creatorhistory descriptionlevel dissemination e-mailaddress edition editor format isbn issn keywords label lineage mark mirrorrepository nextedition notes numberofvolumes organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisheraddress readergroup readpermission rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle sponsor subject tertiarymark tertiarytype type url versiontype volume | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||