Impact of the numerical solution approach of a plant hydrodynamic model (v0.1) on vegetation dynamics
<p>Numerous plant hydrodynamic models have started to be implemented in vegetation dynamics models, reflecting the central role of plant hydraulic traits in driving water, energy, and carbon cycles, as well as plant adaptation to climate change. Different numerical approximations of the govern...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-08-01
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| Series: | Geoscientific Model Development |
| Online Access: | https://gmd.copernicus.org/articles/15/6385/2022/gmd-15-6385-2022.pdf |
| _version_ | 1817996397493878784 |
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| author | Y. Fang L. R. Leung R. Knox C. Koven B. Bond-Lamberty |
| author_facet | Y. Fang L. R. Leung R. Knox C. Koven B. Bond-Lamberty |
| author_sort | Y. Fang |
| collection | DOAJ |
| description | <p>Numerous plant hydrodynamic models have started to be implemented
in vegetation dynamics models, reflecting the central role of plant
hydraulic traits in driving water, energy, and carbon cycles, as well as
plant adaptation to climate change. Different numerical approximations of
the governing equations of the hydrodynamic models have been documented, but
the numerical accuracy of these models and its subsequent effects on the
simulated vegetation function and dynamics have rarely been evaluated. Using
different numerical solution methods (including implicit and explicit
approaches) and vertical discrete grid resolutions, we evaluated the
numerical performance of a plant hydrodynamic module in the Functionally
Assembled Terrestrial Ecosystem Simulator (FATES-HYDRO version 0.1) based on
single-point and global simulations. Our simulation results showed that when
near-surface vertical grid spacing is coarsened (grid size <span class="inline-formula"><i>></i>10</span> cm), the model significantly overestimates aboveground biomass (AGB) in
most of the temperate forest locations and underestimates AGB in the boreal
forest locations, as compared to a simulation with finer vertical grid
spacing. Grid coarsening has a small effect on AGB in the tropical zones of
Asia and South America. In particular, coarse surface grid resolution should
not be used when there are large and prolonged water content differences
among soil layers at depths due to long dry-season duration and/or
well-drained soil or when soil evaporation is a dominant fraction of
evapotranspiration. Similarly, coarse surface grid resolution should not be
used when there is lithologic discontinuity along the soil depth. This
information is useful for uncertainty quantification, sensitivity analysis,
or the training of surrogate models to design the simulations when computational
cost limits the use of ensemble simulations.</p> |
| first_indexed | 2024-04-14T02:21:43Z |
| format | Article |
| id | doaj.art-1e8ebc184fc54090b9c12d3c1ecdf831 |
| institution | Directory Open Access Journal |
| issn | 1991-959X 1991-9603 |
| language | English |
| last_indexed | 2024-04-14T02:21:43Z |
| publishDate | 2022-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Geoscientific Model Development |
| spelling | doaj.art-1e8ebc184fc54090b9c12d3c1ecdf8312022-12-22T02:18:01ZengCopernicus PublicationsGeoscientific Model Development1991-959X1991-96032022-08-01156385639810.5194/gmd-15-6385-2022Impact of the numerical solution approach of a plant hydrodynamic model (v0.1) on vegetation dynamicsY. Fang0L. R. Leung1R. Knox2C. Koven3B. Bond-Lamberty4Earth System Science Division, Pacific Northwest National Laboratory, Richland, Washington, USAAtmospheric Science and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, USAClimate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USAClimate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USAAtmospheric Science and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, USA<p>Numerous plant hydrodynamic models have started to be implemented in vegetation dynamics models, reflecting the central role of plant hydraulic traits in driving water, energy, and carbon cycles, as well as plant adaptation to climate change. Different numerical approximations of the governing equations of the hydrodynamic models have been documented, but the numerical accuracy of these models and its subsequent effects on the simulated vegetation function and dynamics have rarely been evaluated. Using different numerical solution methods (including implicit and explicit approaches) and vertical discrete grid resolutions, we evaluated the numerical performance of a plant hydrodynamic module in the Functionally Assembled Terrestrial Ecosystem Simulator (FATES-HYDRO version 0.1) based on single-point and global simulations. Our simulation results showed that when near-surface vertical grid spacing is coarsened (grid size <span class="inline-formula"><i>></i>10</span> cm), the model significantly overestimates aboveground biomass (AGB) in most of the temperate forest locations and underestimates AGB in the boreal forest locations, as compared to a simulation with finer vertical grid spacing. Grid coarsening has a small effect on AGB in the tropical zones of Asia and South America. In particular, coarse surface grid resolution should not be used when there are large and prolonged water content differences among soil layers at depths due to long dry-season duration and/or well-drained soil or when soil evaporation is a dominant fraction of evapotranspiration. Similarly, coarse surface grid resolution should not be used when there is lithologic discontinuity along the soil depth. This information is useful for uncertainty quantification, sensitivity analysis, or the training of surrogate models to design the simulations when computational cost limits the use of ensemble simulations.</p>https://gmd.copernicus.org/articles/15/6385/2022/gmd-15-6385-2022.pdf |
| spellingShingle | Y. Fang L. R. Leung R. Knox C. Koven B. Bond-Lamberty Impact of the numerical solution approach of a plant hydrodynamic model (v0.1) on vegetation dynamics Geoscientific Model Development |
| title | Impact of the numerical solution approach of a plant hydrodynamic model (v0.1) on vegetation dynamics |
| title_full | Impact of the numerical solution approach of a plant hydrodynamic model (v0.1) on vegetation dynamics |
| title_fullStr | Impact of the numerical solution approach of a plant hydrodynamic model (v0.1) on vegetation dynamics |
| title_full_unstemmed | Impact of the numerical solution approach of a plant hydrodynamic model (v0.1) on vegetation dynamics |
| title_short | Impact of the numerical solution approach of a plant hydrodynamic model (v0.1) on vegetation dynamics |
| title_sort | impact of the numerical solution approach of a plant hydrodynamic model v0 1 on vegetation dynamics |
| url | https://gmd.copernicus.org/articles/15/6385/2022/gmd-15-6385-2022.pdf |
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