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  LPJmL4 - a dynamic global vegetation model with managed land - Part 2: Model evaluation

Schaphoff, S., Forkel, M., Müller, C., Knauer, J., von Bloh, W., Gerten, D., Jägermeyr, J., Lucht, W., Rammig, A., Thonicke, K., Waha, K. (2018): LPJmL4 - a dynamic global vegetation model with managed land - Part 2: Model evaluation. - Geoscientific Model Development, 11, 4, 1377-1403.
https://doi.org/10.5194/gmd-11-1377-2018

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 Creators:
Schaphoff, Sibyll1, Author              
Forkel, M.2, Author
Müller, Christoph1, Author              
Knauer, J.2, Author
von Bloh, Werner1, Author              
Gerten, Dieter1, Author              
Jägermeyr, Jonas1, Author              
Lucht, Wolfgang1, Author              
Rammig, A.2, Author
Thonicke, Kirsten1, Author              
Waha, Katharina1, Author              
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1Potsdam Institute for Climate Impact Research, ou_persistent13              
2External Organizations, ou_persistent22              

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 Abstract: The dynamic global vegetation model LPJmL4 is a process-based model that simulates climate and land use change impacts on the terrestrial biosphere, agricultural production, and the water and carbon cycle. Different versions of the model have been developed and applied to evaluate the role of natural and managed ecosystems in the Earth system and the potential impacts of global environmental change. A comprehensive model description of the new model version, LPJmL4, is provided in a companion paper (Schaphoff et al., 2018c). Here, we provide a full picture of the model performance, going beyond standard benchmark procedures and give hints on the strengths and shortcomings of the model to identify the need for further model improvement. Specifically, we evaluate LPJmL4 against various datasets from in situ measurement sites, satellite observations, and agricultural yield statistics. We apply a range of metrics to evaluate the quality of the model to simulate stocks and flows of carbon and water in natural and managed ecosystems at different temporal and spatial scales. We show that an advanced phenology scheme improves the simulation of seasonal fluctuations in the atmospheric CO2 concentration, while the permafrost scheme improves estimates of carbon stocks. The full LPJmL4 code including the new developments will be supplied open source through https://gitlab.pik-potsdam.de/lpjml/LPJmL. We hope that this will lead to new model developments and applications that improve the model performance and possibly build up a new understanding of the terrestrial biosphere.

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 Dates: 2018
 Publication Status: Finally published
 Pages: -
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 Identifiers: DOI: 10.5194/gmd-11-1377-2018
PIKDOMAIN: Earth System Analysis - Research Domain I
PIKDOMAIN: Climate Impacts & Vulnerabilities - Research Domain II
eDoc: 8102
Working Group: Earth System Model Development
Working Group: Ecosystems in Transition
Working Group: Terrestrial Safe Operating Space
Working Group: Land Use and Resilience
 Degree: -

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Title: Geoscientific Model Development
Source Genre: Journal, SCI, Scopus, p3, oa
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Pages: - Volume / Issue: 11 (4) Sequence Number: - Start / End Page: 1377 - 1403 Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals185