Investigação sobre a camada limite noturna em sítios experimentais da Amazônia: regimes de estabilidade e classes de flutuações turbulentas
We used data measured in micrometeorological towers installed in three areas of primary forest: i) in the experimental site of Uatumã, on the Uatumã Sustainable Development Reserve ( RDSU ), in central Amazonia approximately 135 km northeast of Manaus; ii) in the Biological Reserve of Jarú ( Rebi...
| Autor principal: | Sales, Claudomiro Batista |
|---|---|
| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
|
| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/12596 http://lattes.cnpq.br/6999246034580775 |
| Resumo: |
|---|
|
We used data measured in micrometeorological towers installed in three areas of primary
forest: i) in the experimental site of Uatumã, on the Uatumã Sustainable Development
Reserve ( RDSU ), in central Amazonia approximately 135 km northeast of Manaus; ii) in the
Biological Reserve of Jarú ( Rebio - Jarú ), in an area of upland forest located about 100 km
north of the city of Ji-Paraná, Rondônia, Western Amazon; and iii) in the Ferreira Penna
Scientific Station, administered by the Goeldi Museum, located in the National Caxiuanã
Forest, county of Melgaço, PA, Eastern Amazon.We sought to investigate the structure of the
nocturnal atmospheric turbulence above the Amazon rainforest and its variability depending
on: i) the stability regimes differentiated by the following conditions: atmospheric flow with
strong winds, light winds and global intermittency, as proposed by Sun et al. (2012). For this
we used statistical characteristics of turbulent quantities in the surface boundary layer in each
one of the above stability regimes, in wet and dry periods; ii) Classes of evolution of the
nocturnal boundary layer based on the patterns of variability of turbulent time series (wind
speed, specific humidity, (q), and temperature, (T), and net radiation (Rn). Based on the
oscillation characteristics of these quantities at intervals of 30 minutes, it was possible to
establish classes that express variability patterns of nocturnal turbulence due to the dominant
organized movement, with the presence or not of gravity waves and influence of clouds. The
results indicate the presence of organized movement as “coherent structures" for almost all
studied cases. However, differences were noted among the characteristics of the investigated
experimental sites particularly as regards the occurrence of gravity waves. This research can
be very important in understanding aspects of forest - atmosphere interaction during night -
time, providing support for a better simulation of the atmospheric flow above experimental
sites in Amazonia under stable conditions. |