Details
| Original language | English |
|---|---|
| Article number | 399 |
| Journal | Atmosphere |
| Volume | 9 |
| Issue number | 10 |
| Publication status | Published - 12 Oct 2018 |
Abstract
Using a high resolution model of Large Eddies Simulation (LES), named PALM from PArallel LES Model, a set of simulations were performed to understand how turbulence and convection behave in a pasture and forest sites in Amazonia during the dry and rainy seasons. Related to seasonality, dry period presented higher differences of values (40Wm-2) and patterns over the sites, while in the wet period have more similar characteristics (difference of -10 W m-2). The pasture site had more convection than the forest, with effective mixing and a deeper boundary layer (2600 m). The vertical decrease of sensible heat flux with altitude fed convection and also influenced the convective boundary layer (CBL) height. Regarding the components of turbulent kinetic energy equation, the thermal production was the most important component and the dissipation rate responded with higher growth, especially in cases of greatest mechanical production at the forest surface reaching values up to -20.0.
Keywords
- Energy partition, LES model, Pasture site, Turbulent kinetic energy
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Science (miscellaneous)
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In: Atmosphere, Vol. 9, No. 10, 399, 12.10.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Local Convection and Turbulence in the Amazonia Using Large Eddy Simulation Model
AU - Neves, Theomar
AU - Fisch, Gilberto
AU - Raasch, Siegfried
N1 - Funding information: This research was funded by CNPq through the PhD financial support of grant 140940/2014-6 and the doctorate sandwich program support of the program Science without Borders (241757/2012-6).
PY - 2018/10/12
Y1 - 2018/10/12
N2 - Using a high resolution model of Large Eddies Simulation (LES), named PALM from PArallel LES Model, a set of simulations were performed to understand how turbulence and convection behave in a pasture and forest sites in Amazonia during the dry and rainy seasons. Related to seasonality, dry period presented higher differences of values (40Wm-2) and patterns over the sites, while in the wet period have more similar characteristics (difference of -10 W m-2). The pasture site had more convection than the forest, with effective mixing and a deeper boundary layer (2600 m). The vertical decrease of sensible heat flux with altitude fed convection and also influenced the convective boundary layer (CBL) height. Regarding the components of turbulent kinetic energy equation, the thermal production was the most important component and the dissipation rate responded with higher growth, especially in cases of greatest mechanical production at the forest surface reaching values up to -20.0.
AB - Using a high resolution model of Large Eddies Simulation (LES), named PALM from PArallel LES Model, a set of simulations were performed to understand how turbulence and convection behave in a pasture and forest sites in Amazonia during the dry and rainy seasons. Related to seasonality, dry period presented higher differences of values (40Wm-2) and patterns over the sites, while in the wet period have more similar characteristics (difference of -10 W m-2). The pasture site had more convection than the forest, with effective mixing and a deeper boundary layer (2600 m). The vertical decrease of sensible heat flux with altitude fed convection and also influenced the convective boundary layer (CBL) height. Regarding the components of turbulent kinetic energy equation, the thermal production was the most important component and the dissipation rate responded with higher growth, especially in cases of greatest mechanical production at the forest surface reaching values up to -20.0.
KW - Energy partition
KW - LES model
KW - Pasture site
KW - Turbulent kinetic energy
UR - http://www.scopus.com/inward/record.url?scp=85054915194&partnerID=8YFLogxK
U2 - 10.3390/atmos9100399
DO - 10.3390/atmos9100399
M3 - Article
AN - SCOPUS:85054915194
VL - 9
JO - Atmosphere
JF - Atmosphere
SN - 2073-4433
IS - 10
M1 - 399
ER -