The parallelized large-eddy simulation model (PALM) was used to understand better the turbulent exchanges of a passive scalar above and within a forested region located in the central Amazon. Weak (2 ms−1 ) and strong (6 ms−1 ) wind conditions were simulated. A passive scalar source was introduced to the forest floor for both simulations. The simulations reproduced the main characteristics of the turbulent flow and of the passive scalar transport between the forest and the atmosphere. Noteworthily, strong and weak wind conditions presented different turbulence structures that drove different patterns of scalar exchange both within and above the forest. These results show how passive scalar concentration is influenced by the wind speed at the canopy top. Additionally, higher wind speeds are related to stronger sweep and ejection regimes, generating more intense plumes that are able to reduce the passive scalar concentration inside the forest canopy. This work was the first that used PALM to investigate scalar transport between the Amazon rainforest and the atmosphere.

Simulation of the Scalar Transport above and within the Amazon Forest Canopy / E. Meninéa Serra Neto, H. Santos Martins, C. Quaresma Dias Júnior, R. Santana, D. de Vargas Brondani, A. Manzi, A. A C, P. Teixeira, M. Sörgel, L. Mortarini. - In: ATMOSPHERE. - ISSN 2073-4433. - 12:12(2021 Dec), pp. 1631.1-1631.14. [10.3390/atmos12121631]

Simulation of the Scalar Transport above and within the Amazon Forest Canopy

L. Mortarini
Ultimo
2021

Abstract

The parallelized large-eddy simulation model (PALM) was used to understand better the turbulent exchanges of a passive scalar above and within a forested region located in the central Amazon. Weak (2 ms−1 ) and strong (6 ms−1 ) wind conditions were simulated. A passive scalar source was introduced to the forest floor for both simulations. The simulations reproduced the main characteristics of the turbulent flow and of the passive scalar transport between the forest and the atmosphere. Noteworthily, strong and weak wind conditions presented different turbulence structures that drove different patterns of scalar exchange both within and above the forest. These results show how passive scalar concentration is influenced by the wind speed at the canopy top. Additionally, higher wind speeds are related to stronger sweep and ejection regimes, generating more intense plumes that are able to reduce the passive scalar concentration inside the forest canopy. This work was the first that used PALM to investigate scalar transport between the Amazon rainforest and the atmosphere.
Amazon forest; turbulent exchange; large-eddy simulation; passive scalar
Settore GEOS-04/C - Oceanografia, meteorologia e climatologia
Settore PHYS-05/B - Fisica del sistema Terra, dei pianeti, dello spazio e del clima
dic-2021
7-dic-2021
Article (author)
File in questo prodotto:
File Dimensione Formato  
60_SerraNeto_et_al_atmosphere_2021.pdf

accesso aperto

Tipologia: Publisher's version/PDF
Dimensione 15.11 MB
Formato Adobe PDF
15.11 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1123787
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact