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Verification of a One-Dimensional Model of CO2 Atmospheric Transport Inside and Above a Forest Canopy Using Observations at the Norunda Research Station

Kovalets, Ivan ; Avila, Rodolfo ; Mölder, Meelis LU ; Kovalets, Sophia and Lindroth, Anders LU (2018) In Boundary-Layer Meteorology 168(1). p.103-126
Abstract

A model of (Formula presented.) atmospheric transport in vegetated canopies is tested against measurements of the flow, as well as (Formula presented.) concentrations at the Norunda research station located inside a mixed pine–spruce forest. We present the results of simulations of wind-speed profiles and (Formula presented.) concentrations inside and above the forest canopy with a one-dimensional model of profiles of the turbulent diffusion coefficient above the canopy accounting for the influence of the roughness sub-layer on turbulent mixing according to Harman and Finnigan (Boundary-Layer Meteorol 129:323–351, 2008; hereafter HF08). Different modelling approaches are used to define the turbulent exchange coefficients for momentum... (More)

A model of (Formula presented.) atmospheric transport in vegetated canopies is tested against measurements of the flow, as well as (Formula presented.) concentrations at the Norunda research station located inside a mixed pine–spruce forest. We present the results of simulations of wind-speed profiles and (Formula presented.) concentrations inside and above the forest canopy with a one-dimensional model of profiles of the turbulent diffusion coefficient above the canopy accounting for the influence of the roughness sub-layer on turbulent mixing according to Harman and Finnigan (Boundary-Layer Meteorol 129:323–351, 2008; hereafter HF08). Different modelling approaches are used to define the turbulent exchange coefficients for momentum and concentration inside the canopy: (1) the modified HF08 theory—numerical solution of the momentum and concentration equations with a non-constant distribution of leaf area per unit volume; (2) empirical parametrization of the turbulent diffusion coefficient using empirical data concerning the vertical profiles of the Lagrangian time scale and root-mean-square deviation of the vertical velocity component. For neutral, daytime conditions, the second-order turbulence model is also used. The flexibility of the empirical model enables the best fit of the simulated (Formula presented.) concentrations inside the canopy to the observations, with the results of simulations for daytime conditions inside the canopy layer only successful provided the respiration fluxes are properly considered. The application of the developed model for radiocarbon atmospheric transport released in the form of (Formula presented.) is presented and discussed.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Atmospheric transport, Canopy turbulence, Carbon transport, Micrometeorology, Radiocarbon
in
Boundary-Layer Meteorology
volume
168
issue
1
pages
103 - 126
publisher
Springer
external identifiers
  • scopus:85045050332
ISSN
0006-8314
DOI
10.1007/s10546-018-0340-z
language
English
LU publication?
yes
id
2f67007c-85c1-4c4e-8a81-c54fbba40b68
date added to LUP
2018-04-20 15:16:32
date last changed
2021-09-22 01:28:49
@article{2f67007c-85c1-4c4e-8a81-c54fbba40b68,
  abstract     = {<p>A model of (Formula presented.) atmospheric transport in vegetated canopies is tested against measurements of the flow, as well as (Formula presented.) concentrations at the Norunda research station located inside a mixed pine–spruce forest. We present the results of simulations of wind-speed profiles and (Formula presented.) concentrations inside and above the forest canopy with a one-dimensional model of profiles of the turbulent diffusion coefficient above the canopy accounting for the influence of the roughness sub-layer on turbulent mixing according to Harman and Finnigan (Boundary-Layer Meteorol 129:323–351, 2008; hereafter HF08). Different modelling approaches are used to define the turbulent exchange coefficients for momentum and concentration inside the canopy: (1) the modified HF08 theory—numerical solution of the momentum and concentration equations with a non-constant distribution of leaf area per unit volume; (2) empirical parametrization of the turbulent diffusion coefficient using empirical data concerning the vertical profiles of the Lagrangian time scale and root-mean-square deviation of the vertical velocity component. For neutral, daytime conditions, the second-order turbulence model is also used. The flexibility of the empirical model enables the best fit of the simulated (Formula presented.) concentrations inside the canopy to the observations, with the results of simulations for daytime conditions inside the canopy layer only successful provided the respiration fluxes are properly considered. The application of the developed model for radiocarbon atmospheric transport released in the form of (Formula presented.) is presented and discussed.</p>},
  author       = {Kovalets, Ivan and Avila, Rodolfo and Mölder, Meelis and Kovalets, Sophia and Lindroth, Anders},
  issn         = {0006-8314},
  language     = {eng},
  month        = {02},
  number       = {1},
  pages        = {103--126},
  publisher    = {Springer},
  series       = {Boundary-Layer Meteorology},
  title        = {Verification of a One-Dimensional Model of CO2 Atmospheric Transport Inside and Above a Forest Canopy Using Observations at the Norunda Research Station},
  url          = {http://dx.doi.org/10.1007/s10546-018-0340-z},
  doi          = {10.1007/s10546-018-0340-z},
  volume       = {168},
  year         = {2018},
}