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.
(Less)
- author
- Kovalets, Ivan
; Avila, Rodolfo
; Mölder, Meelis
LU
; Kovalets, Sophia
and Lindroth, Anders
LU
- organization
- publishing date
- 2018-02-23
- 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
- 2024-06-24 13:25:10
@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}},
keywords = {{Atmospheric transport; Canopy turbulence; Carbon transport; Micrometeorology; Radiocarbon}},
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}},
}