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The Community Land Model Version 5: Description of New Features, Benchmarking, and Impact of Forcing Uncertainty
dc.contributor.authorLawrence, David M.
dc.contributor.authorFisher, Rosie A.
dc.contributor.authorKoven, Charles D.
dc.contributor.authorOleson, Keith W.
dc.contributor.authorSwenson, Sean C.
dc.contributor.authorBonan, Gordon
dc.contributor.authorCollier, Nathan
dc.contributor.authorGhimire, Bardan
dc.contributor.authorKampenhout, Leo
dc.contributor.authorKennedy, Daniel
dc.contributor.authorKluzek, Erik
dc.contributor.authorLawrence, Peter J.
dc.contributor.authorLi, Fang
dc.contributor.authorLi, Hongyi
dc.contributor.authorLombardozzi, Danica
dc.contributor.authorRiley, William J.
dc.contributor.authorSacks, William J.
dc.contributor.authorShi, Mingjie
dc.contributor.authorVertenstein, Mariana
dc.contributor.authorWieder, William R.
dc.contributor.authorXu, Chonggang
dc.contributor.authorAli, Ashehad A.
dc.contributor.authorBadger, Andrew M.
dc.contributor.authorBisht, Gautam
dc.contributor.authorBroeke, Michiel
dc.contributor.authorBrunke, Michael A.
dc.contributor.authorBurns, Sean P.
dc.contributor.authorBuzan, Jonathan
dc.contributor.authorClark, Martyn
dc.contributor.authorCraig, Anthony
dc.contributor.authorDahlin, Kyla
dc.contributor.authorDrewniak, Beth
dc.contributor.authorFisher, Joshua B.
dc.contributor.authorFlanner, Mark
dc.contributor.authorFox, Andrew M.
dc.contributor.authorGentine, Pierre
dc.contributor.authorHoffman, Forrest
dc.contributor.authorKeppel‐aleks, Gretchen
dc.contributor.authorKnox, Ryan
dc.contributor.authorKumar, Sanjiv
dc.contributor.authorLenaerts, Jan
dc.contributor.authorLeung, L. Ruby
dc.contributor.authorLipscomb, William H.
dc.contributor.authorLu, Yaqiong
dc.contributor.authorPandey, Ashutosh
dc.contributor.authorPelletier, Jon D.
dc.contributor.authorPerket, Justin
dc.contributor.authorRanderson, James T.
dc.contributor.authorRicciuto, Daniel M.
dc.contributor.authorSanderson, Benjamin M.
dc.contributor.authorSlater, Andrew
dc.contributor.authorSubin, Zachary M.
dc.contributor.authorTang, Jinyun
dc.contributor.authorThomas, R. Quinn
dc.contributor.authorVal Martin, Maria
dc.contributor.authorZeng, Xubin
dc.date.accessioned2020-02-05T15:04:49Z
dc.date.availableWITHHELD_11_MONTHS
dc.date.available2020-02-05T15:04:49Z
dc.date.issued2019-12
dc.identifier.citationLawrence, David M.; Fisher, Rosie A.; Koven, Charles D.; Oleson, Keith W.; Swenson, Sean C.; Bonan, Gordon; Collier, Nathan; Ghimire, Bardan; Kampenhout, Leo; Kennedy, Daniel; Kluzek, Erik; Lawrence, Peter J.; Li, Fang; Li, Hongyi; Lombardozzi, Danica; Riley, William J.; Sacks, William J.; Shi, Mingjie; Vertenstein, Mariana; Wieder, William R.; Xu, Chonggang; Ali, Ashehad A.; Badger, Andrew M.; Bisht, Gautam; Broeke, Michiel; Brunke, Michael A.; Burns, Sean P.; Buzan, Jonathan; Clark, Martyn; Craig, Anthony; Dahlin, Kyla; Drewniak, Beth; Fisher, Joshua B.; Flanner, Mark; Fox, Andrew M.; Gentine, Pierre; Hoffman, Forrest; Keppel‐aleks, Gretchen ; Knox, Ryan; Kumar, Sanjiv; Lenaerts, Jan; Leung, L. Ruby; Lipscomb, William H.; Lu, Yaqiong; Pandey, Ashutosh; Pelletier, Jon D.; Perket, Justin; Randerson, James T.; Ricciuto, Daniel M.; Sanderson, Benjamin M.; Slater, Andrew; Subin, Zachary M.; Tang, Jinyun; Thomas, R. Quinn; Val Martin, Maria; Zeng, Xubin (2019). "The Community Land Model Version 5: Description of New Features, Benchmarking, and Impact of Forcing Uncertainty." Journal of Advances in Modeling Earth Systems 11(12): 4245-4287.
dc.identifier.issn1942-2466
dc.identifier.issn1942-2466
dc.identifier.urihttps://hdl.handle.net/2027.42/153578
dc.description.abstractThe Community Land Model (CLM) is the land component of the Community Earth System Model (CESM) and is used in several global and regional modeling systems. In this paper, we introduce model developments included in CLM version 5 (CLM5), which is the default land component for CESM2. We assess an ensemble of simulations, including prescribed and prognostic vegetation state, multiple forcing data sets, and CLM4, CLM4.5, and CLM5, against a range of metrics including from the International Land Model Benchmarking (ILAMBv2) package. CLM5 includes new and updated processes and parameterizations: (1) dynamic land units, (2) updated parameterizations and structure for hydrology and snow (spatially explicit soil depth, dry surface layer, revised groundwater scheme, revised canopy interception and canopy snow processes, updated fresh snow density, simple firn model, and Model for Scale Adaptive River Transport), (3) plant hydraulics and hydraulic redistribution, (4) revised nitrogen cycling (flexible leaf stoichiometry, leaf N optimization for photosynthesis, and carbon costs for plant nitrogen uptake), (5) global crop model with six crop types and timeâ evolving irrigated areas and fertilization rates, (6) updated urban building energy, (7) carbon isotopes, and (8) updated stomatal physiology. New optional features include demographically structured dynamic vegetation model (Functionally Assembled Terrestrial Ecosystem Simulator), ozone damage to plants, and fire trace gas emissions coupling to the atmosphere. Conclusive establishment of improvement or degradation of individual variables or metrics is challenged by forcing uncertainty, parametric uncertainty, and model structural complexity, but the multivariate metrics presented here suggest a general broad improvement from CLM4 to CLM5.Plain Language SummaryThe Community Land Model (CLM) is the land component of the widely used Community Earth System Model (CESM). Here, we introduce model developments included in CLM version 5 (CLM5), the default land component for CESM2 which will be used for the Coupled Model Intercomparison Project (CMIP6). CLM5 includes many new and updated processes including (1) hydrology and snow features such as spatially explicit soil depth, canopy snow processes, a simple firn model, and a more mechanistic river model, (2) plant hydraulics and hydraulic redistribution, (3) revised nitrogen cycling with flexible leaf stoichiometry, leaf N optimization for photosynthesis, and carbon costs for plant nitrogen uptake, (4) expansion to six crop types (global) and timeâ evolving irrigated areas and fertilization rates, (5) improved urban building energy model, and (6) carbon isotopes. New optional features include a demographically structured dynamic vegetation model, ozone damage to plants, and fire trace gas emissions coupling to the atmosphere. Model performance is generally improved for most assessed variables and metrics, though clear establishment of improvement or degradation is challenging due to model complexity as well as observational data limitations. Nonetheless, CLM5 is increasingly suited for research into a broad range of societally relevant scientific questions related to the terrestrial system.Key PointsUpdated Community Land Model has more hydrological and ecological process fidelity and more comprehensive representation of land management.The model is systematically evaluated using International Land Model Benchmarking system and shows marked improvement over prior versions.
dc.publisherSpringer
dc.publisherWiley Periodicals, Inc.
dc.subject.otherglobal land model
dc.subject.otherEarth System Modeling
dc.subject.othercarbon and nitrogen cycling
dc.subject.otherhydrology
dc.subject.otherbenchmarking
dc.titleThe Community Land Model Version 5: Description of New Features, Benchmarking, and Impact of Forcing Uncertainty
dc.typeArticle
dc.rights.robotsIndexNoFollow
dc.subject.hlbsecondlevelGeological Sciences
dc.subject.hlbtoplevelScience
dc.description.peerreviewedPeer Reviewed
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/153578/1/jame20995_am.pdf
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/153578/2/jame20995.pdf
dc.identifier.doi10.1029/2018MS001583
dc.identifier.sourceJournal of Advances in Modeling Earth Systems
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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