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000908765 1001_ $$0P:(DE-Juel1)164848$$aDombrowski, Olga$$b0$$eCorresponding author$$ufzj
000908765 245__ $$aCLM5-FruitTree: a new sub-model for deciduous fruit trees in the Community Land Model (CLM5)
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000908765 520__ $$aThe inclusion of perennial, woody crops in land surface models (LSMs) is crucial for addressing their role in carbon (C) sequestration, food production, and water requirements under climate change. To help quantify the biogeochemical and biogeophysical processes associated with these agroecosystems, we developed and tested a new sub-model, CLM5-FruitTree, for deciduous fruit orchards within the framework of the Community Land Model version 5 (CLM5). The model development included (1) a new perennial crop phenology description, (2) an adapted C and nitrogen allocation scheme, considering both storage and photosynthetic growth of annual and perennial plant organs, (3) typical management practices associated with fruit orchards, and (4) the parameterization of an apple plant functional type. CLM5-FruitTree was tested using extensive field measurements from an apple orchard in South Tyrol, Italy. Growth and partitioning of biomass to the individual plant components were well represented by CLM5-FruitTree, and average yield was predicted within 2.3 % of the observed values despite low simulated inter-annual variability compared to observations. The simulated seasonal course of C, energy, and water fluxes was in good agreement with the eddy covariance (EC) measurements owing to the accurate representation of the prolonged growing season and typical leaf area development of the orchard. We found that gross primary production, net radiation, and latent heat flux were highly correlated (r>0.94) with EC measurements and showed little bias (<±5 %). Simulated respiration components, sensible heat, and soil heat flux were less consistent with observations. This was attributed to simplifications in the orchard structure and to the presence of additional management practices that are not yet represented in CLM5-FruitTree. Finally, the results suggested that the representation of microbial and autotrophic respiration and energy partitioning in complex, discontinuous canopies in CLM5 requires further attention. The new CLM5-FruitTree sub-model improved the representation of agricultural systems in CLM5 and can be used to study land surface processes in fruit orchards at the local, regional, or larger scale.
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000908765 7001_ $$0P:(DE-Juel1)168418$$aBrogi, Cosimo$$b1
000908765 7001_ $$0P:(DE-Juel1)138662$$aHendricks-Franssen, Harrie-Jan$$b2$$ufzj
000908765 7001_ $$00000-0002-7700-5761$$aZanotelli, Damiano$$b3
000908765 7001_ $$0P:(DE-Juel1)129440$$aBogena, Heye$$b4
000908765 773__ $$0PERI:(DE-600)2456725-5$$a10.5194/gmd-15-5167-2022$$gVol. 15, no. 13, p. 5167 - 5193$$n13$$p5167 - 5193$$tGeoscientific model development$$v15$$x1991-959X$$y2022
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