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Title: Evaluation of the Community Land Model simulated carbon and water fluxes against observations over ChinaFLUX sites

Journal Article · · Agricultural and Forest Meteorology
 [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [1]; ORCiD logo [2];  [1];  [3];  [4];  [1];  [5];  [6];  [7];  [8];  [1]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Chinese Academy of Sciences, Guiyang (China)
  4. East China Normal Univ., Shanghai (China)
  5. Chinese Academy of Sciences, Shenyang (China)
  6. Chinese Academy of Sciences, Xining (China)
  7. Chinese Academy of Sciences, Guangzhou (China)
  8. Univ. of Chinese Academy of Sciences, Beijing (China)
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The Community Land Model (CLM) is an advanced process-based land surface model that simulates carbon, nitrogen, water vapor and energy exchanges between terrestrial ecosystems and the atmosphere at various spatial and temporal scales. We use observed carbon and water fluxes from five representative Chinese Terrestrial Ecosystem Flux Research Network (ChinaFLUX) eddy covariance tower sites to systematically evaluate the new version CLM4.5 and old version CLM4.0, and to generate insights that may inform future model developments. CLM4.5 underestimates the annual carbon sink at three forest sites and one alpine grassland site but overestimates the carbon sink of a semi-arid grassland site. The annual carbon sink underestimation for the deciduous-dominated forest site results from underestimated daytime carbon sequestration during summer and overestimated nighttime carbon emission during spring and autumn. Compared to CLM4.0, the bias of annual gross primary production (GPP) is reduced by 24% and 28% in CLM4.5 at two subtropical forest sites. However, CLM4.5 still presents a large positive bias in annual GPP. The improvement in net ecosystem exchange (NEE) is limited, although soil respiration bias decreases by 16%–43% at three forest sites. CLM4.5 simulates lower soil water content in the dry season than CLM4.0 at two grassland sites. Drier soils produce a significant drop in the leaf area index and in GPP and an increase in respiration for CLM4.5. The new fire parameterization approach in CLM4.5 causes excessive burning at the Changbaishan forest site, resulting in an unexpected underestimation of NEE, vegetation carbon, and soil organic carbon by 46%, 95%, and 87%, respectively. Altogether, our study reveals significant improvements achieved by CLM4.5 compared to CLM4.0, and suggests further developments on the parameterization of seasonal GPP and respiration, which will require a more effective representation of seasonal water conditions and the partitioning of net radiation between sensible and heat fluxes.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1394600
Alternate ID(s):
OSTI ID: 1397520
Journal Information:
Agricultural and Forest Meteorology, Vol. 226-227, Issue C; ISSN 0168-1923
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

References (73)

Evaluating the potential of large-scale simulations to predict carbon fluxes of terrestrial ecosystems over a European Eddy Covariance network journal January 2014
Evaluation of soil moisture in the Florida State University climate model–National Center for Atmospheric Research community land model (FSU-CLM) using two reanalyses (R2 and ERA40) and in situ observations journal January 2006
Improving canopy processes in the Community Land Model version 4 (CLM4) using global flux fields empirically inferred from FLUXNET data journal January 2011
Reconciling leaf physiological traits and canopy flux data: Use of the TRY and FLUXNET databases in the Community Land Model version 4: COMMUNITY LAND MODEL CANOPY SCALING journal June 2012
Connecting mathematical ecosystems, real-world ecosystems, and climate science journal April 2014
Global response of terrestrial ecosystem structure and function to CO 2 and climate change: results from six dynamic global vegetation models journal April 2001
Forest water use and water use efficiency at elevated CO 2 : a model-data intercomparison at two contrasting temperate forest FACE sites journal March 2013
Where does the carbon go? A model-data intercomparison of vegetation carbon allocation and turnover processes at two temperate forest free-air CO 2 enrichment sites journal May 2014
Multi-site evaluation of terrestrial evaporation models using FLUXNET data journal April 2014
Gap filling strategies for defensible annual sums of net ecosystem exchange journal March 2001
Evaluating adjusted forcing and model spread for historical and future scenarios in the CMIP5 generation of climate models: FORCING IN CMIP5 CLIMATE MODELS journal February 2013
How positive is the feedback between climate change and the carbon cycle? journal January 2003
Uncertainties in CMIP5 Climate Projections due to Carbon Cycle Feedbacks journal January 2014
Effect of water stress on ecosystem photosynthesis and respiration of a Leymus chinensis steppe in Inner Mongolia journal November 2006
Long-term effects of different land use types on C, N, and P stoichiometry and storage in subtropical ecosystems: A case study in China journal June 2014
Seasonal variation in carbon exchange and its ecological analysis over Leymus chinensis steppe in Inner Mongolia journal November 2006
Evaluation and improvement of MODIS gross primary productivity in typical forest ecosystems of East Asia based on eddy covariance measurements journal February 2013
Large-scale estimation and uncertainty analysis of gross primary production in Tibetan alpine grasslands: GPP uncertainty in Tibetan grasslands journal March 2014
Effects of vegetation control on ecosystem water use efficiency within and among four grassland ecosystems in China journal July 2008
The ecosystem carbon accumulation after conversion of grasslands to pine plantations in subtropical red soil of South China journal January 2007
Increasing phosphorus limitation along three successional forests in southern China journal July 2012
North American Carbon Program (NACP) regional interim synthesis: Terrestrial biospheric model intercomparison journal May 2012
Site-level model–data synthesis of terrestrial carbon fluxes in the CarboEastAsia eddy-covariance observation network: toward future modeling efforts journal February 2013
Modeling the impact of drought on canopy carbon and water fluxes for a subtropical evergreen coniferous plantation in southern China through parameter optimization using an ensemble Kalman filter journal January 2010
Assessing the ability of three land ecosystem models to simulate gross carbon uptake of forests from boreal to Mediterranean climate in Europe journal January 2007
Uncertainties of modeling gross primary productivity over Europe: A systematic study on the effects of using different drivers and terrestrial biosphere models: EFFECTS ON SIMULATED GPP journal December 2007
The effect of vertically resolved soil biogeochemistry and alternate soil C and N models on C dynamics of CLM4 journal January 2013
Representing a new MODIS consistent land surface in the Community Land Model (CLM 3.0) journal January 2007
Evaluation of the Community Land Model 3.5 with carbon and nitrogen cycles (CLM3.5CN) at a Tibetan grassland site journal September 2013
Evaluating runoff simulations from the Community Land Model 4.0 using observations from flux towers and a mountainous watershed: EVALUATING RUNOFF SIMULATIONS FROM CLM4 journal December 2011
A process-based fire parameterization of intermediate complexity in a Dynamic Global Vegetation Model journal January 2012
Quantifying the role of fire in the Earth system – Part 1: Improved global fire modeling in the Community Earth System Model (CESM1) journal January 2013
Remote Sensing Evaluation of CLM4 GPP for the Period 2000–09 journal August 2012
Disentangling climatic and anthropogenic controls on global terrestrial evapotranspiration trends journal September 2015
Modeling burned area in Europe with the Community Land Model: MODELING BURNED AREA IN EUROPE journal March 2013
Comparing and evaluating process-based ecosystem model predictions of carbon and water fluxes in major European forest biomes journal December 2005
An observation-based formulation of snow cover fraction and its evaluation over large North American river basins journal January 2007
A simple TOPMODEL-based runoff parameterization (SIMTOP) for use in global climate models journal January 2005
Evaluation of Community Climate System Model soil temperatures using observations from Russia journal December 2007
Contribution of climate change and rising CO2 to terrestrial carbon balance in East Asia: A multi-model analysis journal February 2011
Evaluation of terrestrial carbon cycle models for their response to climate variability and to CO 2 trends journal April 2013
Simulation of Global Land Surface Conditions from 1948 to 2004. Part I: Forcing Data and Evaluations journal October 2006
Evaluation of continental carbon cycle simulations with North American flux tower observations journal November 2013
Uncertainty analysis of modeled carbon and water fluxes in a subtropical coniferous plantation: UNCERTAINTY ANALYSIS OF CO 2 AND H 2 O FLUXES journal December 2013
Terrestrial biosphere models need better representation of vegetation phenology: results from the North American Carbon Program Site Synthesis journal November 2011
A model-data comparison of gross primary productivity: Results from the North American Carbon Program site synthesis: A MODEL-DATA COMPARISON OF GPP journal July 2012
A model-data intercomparison of CO 2 exchange across North America: Results from the North American Carbon Program site synthesis journal January 2010
The impact of climate, CO 2 , nitrogen deposition and land use change on simulated contemporary global river flow : MECHANISMS OF GLOBAL RIVER FLOW journal April 2011
Spatiotemporal patterns of evapotranspiration in response to multiple environmental factors simulated by the Community Land Model journal April 2013
Evaluation of the terrestrial carbon cycle, future plant geography and climate-carbon cycle feedbacks using five Dynamic Global Vegetation Models (DGVMs) journal September 2008
Use of FLUXNET in the Community Land Model development: USE OF FLUXNET IN THE CLM DEVELOPMENT journal March 2008
A numerical issue in calculating the coupled carbon and water fluxes in a climate model: CORRECTING A NUMERICAL ERROR IN CLM4 journal November 2012
Improved simulation of the terrestrial hydrological cycle in permafrost regions by the Community Land Model: IMPROVED CLM COLD-REGION HYDROLOGY journal March 2012
Interannual Variation of the Bowen Ratio in a Subtropical Coniferous Plantation in Southeast China, 2003-2012 journal February 2014
Spatial patterns of terrestrial net ecosystem productivity in China during 1981–2000 journal May 2007
Global patterns of nitrogen limitation: confronting two global biogeochemical models with observations journal August 2013
Influence of carbon-nitrogen cycle coupling on land model response to CO 2 fertilization and climate variability : INFLUENCE OF CARBON-NITROGEN COUPLING journal December 2007
Carbon-nitrogen interactions regulate climate-carbon cycle feedbacks: results from an atmosphere-ocean general circulation model journal January 2009
Causes of variation in soil carbon simulations from CMIP5 Earth system models and comparison with observations journal January 2013
Comprehensive ecosystem model-data synthesis using multiple data sets at two temperate forest free-air CO 2 enrichment experiments: Model performance at ambient CO 2 concentration : FACE MODEL-DATA SYNTHESIS journal May 2014
Using MODIS BRDF and Albedo Data to Evaluate Global Model Land Surface Albedo journal February 2004
Modeling gross primary productivity for winter wheat–maize double cropping system using MODIS time series and CO2 eddy flux tower data journal February 2009
Substantial amounts of carbon are sequestered during dry periods in an old-growth subtropical forest in South China journal February 2013
Seasonal and inter-annual variations in net ecosystem exchange of two old-growth forests in southern China journal December 2013
The role of phosphorus dynamics in tropical forests – a modeling study using CLM-CNP journal January 2014
Overview of ChinaFLUX and evaluation of its eddy covariance measurement journal April 2006
Water-use efficiency of forest ecosystems in eastern China and its relations to climatic variables journal March 2008
High carbon dioxide uptake by subtropical forest ecosystems in the East Asian monsoon region journal March 2014
Evaluation of 11 terrestrial carbon-nitrogen cycle models against observations from two temperate Free-Air CO 2 Enrichment studies journal January 2014
Seasonal dynamics of soil CO2 effluxes with responses to environmental factors in lower subtropical forests of China journal November 2006
Seasonal variation of carbon exchange of typical forest ecosystems along the eastern forest transect in China journal November 2006
Diurnal, seasonal and annual variation in net ecosystem CO 2 exchange of an alpine shrubland on Qinghai-Tibetan plateau journal October 2006
Temperature sensitivity of soil respiration is affected by prevailing climatic conditions and soil organic carbon content: A trans-China based case study journal July 2009

Cited By (4)

Pairing FLUXNET sites to validate model representations of land-use/land-cover change journal January 2018
Modeling Canopy Carbon and Water Fluxes Using a Multilayered Model over a Temperate Meadow in Inner Mongolia journal October 2019
A Carbon Flux Assessment Driven by Environmental Factors Over the Tibetan Plateau and Various Permafrost Regions journal May 2019
Interactive impacts of fire and vegetation dynamics on global carbon and water budget using Community Land Model version 4.5 journal January 2019

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Related Subjects

54 ENVIRONMENTAL SCIENCES
58 GEOSCIENCES
Community land model
ChinaFLUX
Eddy covariance
Carbon flux