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An improved parameterization of the allocation of assimilated carbon to plant parts in vegetation dynamics for Noah-MP

Title
An improved parameterization of the allocation of assimilated carbon to plant parts in vegetation dynamics for Noah-MP
Authors
Gim H.-J.Park S.K.Kang M.Thakuri B.M.Kim J.Ho C.-H.
Ewha Authors
박선기
SCOPUS Author ID
박선기scopus
Issue Date
2017
Journal Title
Journal of Advances in Modeling Earth Systems
ISSN
1942-2466JCR Link
Citation
vol. 9, no. 4, pp. 1776 - 1794
Keywords
land surface modelparameterizationplant allometric growthplant carbon allocationtemperate forest predictionvegetation dynamics
Publisher
Blackwell Publishing Ltd
Indexed
SCIE; SCOPUS WOS scopus
Abstract
In the land surface models predicting vegetation growth and decay, representation of the seasonality of land surface energy and mass fluxes largely depends on how to describe the vegetation dynamics. In this study, we developed a new parameterization scheme to characterize allocation of the assimilated carbon to plant parts, including leaves and fine roots. The amount of carbon allocation in this scheme depends on the climatological net primary production (NPP) of the plants. The newly developed scheme is implemented in the augmented Noah land surface model with multiple parameterization options (Noah-MP) along with other biophysical processes related to variations in photosynthetic capacity. The scheme and the augmented biophysical processes are evaluated against tower measurements of vegetation from four forest sites in various regions—two for the deciduous broadleaf and two for the needleleaf evergreen forest. Results from the augmented Noah-MP showed good agreement with the observations and demonstrated improvements in representing the seasonality of leaf area index (LAI), gross primary production (GPP), ecosystem respiration (ER), and latent heat flux. In particular, significant improvements are found in simulating amplitudes and phase shift timing in the LAI seasonal cycle, and the amount of GPP and ER in the growing season. Furthermore, the augmented Noah-MP performed reasonably well in simulating the spatial distributions of LAI, GPP, and NPP in East Asia, consistent with the satellite observations. © 2017. The Authors.
DOI
10.1002/2016MS000890
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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