CESM1 (Community Earth System Model, version 1)

The Community Earth System Model (CESM) is a coupled climate model for simulating the earth's climate system. Composed of four separate models simultaneously simulating the earth's atmosphere, ocean, land surface and sea-ice, and one central coupler component, the CESM allows researchers to conduct fundamental research into the earth's past, present and future climate states. CCSM4.0 is a subset of CESM1.0. All CCSM4.0 compsets and resolutions are also found in CESM1.0.z.

coupled climate modelcentral coupler component

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Initial contribute: 2020-06-28

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Application-focused categoriesIntegrated-perspectiveGlobal scale

Detailed Description

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The Community Land Model is the land model for the Community Earth System Model (CESM).

It is a collaborative project between scientists in the Terrestrial Sciences Section (TSS) and the Climate and Global Dynamics Division (CGD) at the National Center for Atmospheric Research (NCAR) and the CESM Land Model and Biogeochemistry Working Groups. Other principal working groups that contribute to the CLM are the Chemistry-Climate, Paleoclimate, Climate Change, and Land Ice Working Groups.

The model formalizes and quantifies concepts of ecological climatology. Ecological climatology is an interdisciplinary framework to understand how natural and human changes in vegetation affect climate. It examines the physical, chemical, and biological processes by which terrestrial ecosystems affect and are affected by climate across a variety of spatial and temporal scales. The central theme is that terrestrial ecosystems, through their cycling of energy, water, chemical elements, and trace gases, are important determinants of climate. The land surface is a critical interface through which climate change impacts humans and ecosystems and through which humans and ecosystems can effect global environmental change (iLEAPS Newsletter article on CLM).

The model represents several aspects of the land surface including surface heterogeneity and consists of components or submodels related to land biogeophysics, the hydrologic cyclebiogeochemistryhuman dimensions, and ecosystem dynamics. Specific processes that are represented include:

  • Vegetation composition, structure, and phenology
  • Absorption, reflection, and transmittance of solar radiation
  • Absorption and emission of longwave radiation
  • Momentum, sensible heat (ground and canopy), and latent heat (ground evaporation, canopy evaporation, transpiration) fluxes
  • Heat transfer in soil and snow including phase change
  • Canopy hydrology (interception, throughfall, and drip)
  • Snow hydrology (snow accumulation and melt, compaction, water transfer between snow layers)
  • Soil hydrology (surface runoff, infiltration, redistribution of water within the column, sub-surface drainage, groundwater)
  • Plant hydrodynamics
  • Stomatal physiology and photosynthesis
  • Lake temperatures and fluxes
  • Dust deposition and fluxes
  • Routing of runoff from rivers to ocean
  • Volatile organic compounds emissions
  • Urban energy balance and climate
  • Carbon-nitrogen cycling
  • Dynamic landcover change
  • Land management including crops and crop management and wood harvest
  • Ecosystem Demography (FATES, optional)

模型元数据

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National Center for Atmospheric Research (2020). CESM1 (Community Earth System Model, version 1), Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/3ea72e2a-9d5a-4436-8106-c39fa5b7dabe
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History

Last modifier
Yue Songshan
Last modify time
2021-02-05
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Contributor(s)

Initial contribute : 2020-06-28

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Authorship

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History

Last modifier
Yue Songshan
Last modify time
2021-02-05
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