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| Titel |
Modeling dissolved organic carbon in temperate forest soils: TRIPLEX-DOC model development and validation |
| VerfasserIn |
H. Wu, C. Peng, T. R. Moore, D. Hua, C. Li, Q. Zhu, M. Peichl, M. A. Arain, Z. Guo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 7, no. 3 ; Nr. 7, no. 3 (2014-05-14), S.867-881 |
| Datensatznummer |
250115619
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| Publikation (Nr.) |
 copernicus.org/gmd-7-867-2014.pdf |
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| Zusammenfassung |
| Even though dissolved organic carbon (DOC) is the most active carbon (C)
cycling in soil organic carbon (SOC) pools, it receives little attention
from the global C budget. DOC fluxes are critical to aquatic ecosystem
inputs and contribute to the C balance of terrestrial ecosystems, but few
ecosystem models have attempted to integrate DOC dynamics into terrestrial C
cycling. This study introduces a new process-based model, TRIPLEX-DOC, that
is capable of estimating DOC dynamics in forest soils by incorporating both
ecological drivers and biogeochemical processes. TRIPLEX-DOC was developed
from Forest-DNDC, a biogeochemical model simulating C and nitrogen (N)
dynamics, coupled with a new DOC process module that predicts metabolic
transformations, sorption/desorption, and DOC leaching in forest soils. The
model was validated against field observations of DOC concentrations and
fluxes at white pine forest stands located in southern Ontario, Canada. The
model was able to simulate seasonal dynamics of DOC concentrations and the
magnitudes observed within different soil layers, as well as DOC leaching in
the age sequence of these forests. Additionally, TRIPLEX-DOC estimated the
effect of forest harvesting on DOC leaching, with a significant increase
following harvesting, illustrating that land use change is of critical
importance in regulating DOC leaching in temperate forests as an important
source of C input to aquatic ecosystems. |
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