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Title: Systematic Assessment of Terrestrial Biogeochemistry in Coupled Climate-Carbon Models

Abstract

With representation of the global carbon cycle becoming increasingly complex in climate models, it is important to develop ways to quantitatively evaluate model performance against in situ and remote sensing observations. Here we present a systematic framework, the Carbon-LAnd Model Intercomparison Project (C-LAMP), for assessing terrestrial biogeochemistry models coupled to climate models using observations that span a wide range of temporal and spatial scales. As an example of the value of such comparisons, we used this framework to evaluate two biogeochemistry models that are integrated within the Community Climate System Model (CCSM) - Carnegie-Ames-Stanford Approach (CASA) and carbon-nitrogen (CN). Both models underestimated the magnitude of net carbon uptake during the growing season in temperate and boreal forest ecosystems, based on comparison with atmospheric CO{sub 2} measurements and eddy covariance measurements of net ecosystem exchange. Comparison with MODerate Resolution Imaging Spectroradiometer (MODIS) measurements show that this low bias in model fluxes was caused, at least in part, by 1-3 month delays in the timing of maximum leaf area. In the tropics, the models overestimated carbon storage in woody biomass based on comparison with datasets from the Amazon. Reducing this model bias will probably weaken the sensitivity of terrestrial carbon fluxes tomore » both atmospheric CO{sub 2} and climate. Global carbon sinks during the 1990s differed by a factor of two (2.4 Pg C yr{sup -1} for CASA vs. 1.2 Pg C yr{sup -1} for CN), with fluxes from both models compatible with the atmospheric budget given uncertainties in other terms. The models captured some of the timing of interannual global terrestrial carbon exchange during 1988-2004 based on comparison with atmospheric inversion results from TRANSCOM (r=0.66 for CASA and r=0.73 for CN). Adding (CASA) or improving (CN) the representation of deforestation fires may further increase agreement with the atmospheric record. Information from C-LAMP has enhanced model performance within CCSM and serves as a benchmark for future development. We propose that an open source, community-wide platform for model-data intercomparison is needed to speed model development and to strengthen ties between modeling and measurement communities. Important next steps include the design and analysis of land use change simulations (in both uncoupled and coupled modes), and the entrainment of additional ecological and earth system observations. Model results from C-LAMP are publicly available on the Earth System Grid.« less

Authors:
 [1];  [2];  [2];  [3];  [4];  [4];  [4];  [5];  [4];  [6];  [7];  [8];  [9]
  1. University of California, Irvine
  2. ORNL
  3. Cornell University
  4. National Center for Atmospheric Research (NCAR)
  5. Woods Hole Oceanographic Institution (WHOI), Woods Hole, MA
  6. Colorado State University, Fort Collins
  7. Lawrence Livermore National Laboratory (LLNL)
  8. University of Montana, Missoula
  9. University of California, Berkeley
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Center for Computational Sciences (NCCS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
963697
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Global Change Biology
Additional Journal Information:
Journal Volume: 15; Journal Issue: 9; Journal ID: ISSN 1354-1013
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; BENCHMARKS; BIOGEOCHEMISTRY; BIOMASS; CARBON; CARBON CYCLE; CARBON SINKS; CLIMATE MODELS; DEFORESTATION; ECOSYSTEMS; ENTRAINMENT; LAND USE; REMOTE SENSING; RESOLUTION; SEASONS; SENSITIVITY; STORAGE; TEMPERATURE INVERSIONS

Citation Formats

Randerson, Jim, Hoffman, Forrest M, Thornton, Peter E, Mahowald, Natalie, Lindsay, Keith, Lee, Jeff, Nevison, Cynthia, Doney, Scott C., Bonan, Gordon, Stockli, Reto, Covey, Curtis, Running, Steven, and Fung, Inez. Systematic Assessment of Terrestrial Biogeochemistry in Coupled Climate-Carbon Models. United States: N. p., 2009. Web. doi:10.1111/j.1365-2486.2009.01912.x.
Randerson, Jim, Hoffman, Forrest M, Thornton, Peter E, Mahowald, Natalie, Lindsay, Keith, Lee, Jeff, Nevison, Cynthia, Doney, Scott C., Bonan, Gordon, Stockli, Reto, Covey, Curtis, Running, Steven, & Fung, Inez. Systematic Assessment of Terrestrial Biogeochemistry in Coupled Climate-Carbon Models. United States. https://doi.org/10.1111/j.1365-2486.2009.01912.x
Randerson, Jim, Hoffman, Forrest M, Thornton, Peter E, Mahowald, Natalie, Lindsay, Keith, Lee, Jeff, Nevison, Cynthia, Doney, Scott C., Bonan, Gordon, Stockli, Reto, Covey, Curtis, Running, Steven, and Fung, Inez. Thu . "Systematic Assessment of Terrestrial Biogeochemistry in Coupled Climate-Carbon Models". United States. https://doi.org/10.1111/j.1365-2486.2009.01912.x.
@article{osti_963697,
title = {Systematic Assessment of Terrestrial Biogeochemistry in Coupled Climate-Carbon Models},
author = {Randerson, Jim and Hoffman, Forrest M and Thornton, Peter E and Mahowald, Natalie and Lindsay, Keith and Lee, Jeff and Nevison, Cynthia and Doney, Scott C. and Bonan, Gordon and Stockli, Reto and Covey, Curtis and Running, Steven and Fung, Inez},
abstractNote = {With representation of the global carbon cycle becoming increasingly complex in climate models, it is important to develop ways to quantitatively evaluate model performance against in situ and remote sensing observations. Here we present a systematic framework, the Carbon-LAnd Model Intercomparison Project (C-LAMP), for assessing terrestrial biogeochemistry models coupled to climate models using observations that span a wide range of temporal and spatial scales. As an example of the value of such comparisons, we used this framework to evaluate two biogeochemistry models that are integrated within the Community Climate System Model (CCSM) - Carnegie-Ames-Stanford Approach (CASA) and carbon-nitrogen (CN). Both models underestimated the magnitude of net carbon uptake during the growing season in temperate and boreal forest ecosystems, based on comparison with atmospheric CO{sub 2} measurements and eddy covariance measurements of net ecosystem exchange. Comparison with MODerate Resolution Imaging Spectroradiometer (MODIS) measurements show that this low bias in model fluxes was caused, at least in part, by 1-3 month delays in the timing of maximum leaf area. In the tropics, the models overestimated carbon storage in woody biomass based on comparison with datasets from the Amazon. Reducing this model bias will probably weaken the sensitivity of terrestrial carbon fluxes to both atmospheric CO{sub 2} and climate. Global carbon sinks during the 1990s differed by a factor of two (2.4 Pg C yr{sup -1} for CASA vs. 1.2 Pg C yr{sup -1} for CN), with fluxes from both models compatible with the atmospheric budget given uncertainties in other terms. The models captured some of the timing of interannual global terrestrial carbon exchange during 1988-2004 based on comparison with atmospheric inversion results from TRANSCOM (r=0.66 for CASA and r=0.73 for CN). Adding (CASA) or improving (CN) the representation of deforestation fires may further increase agreement with the atmospheric record. Information from C-LAMP has enhanced model performance within CCSM and serves as a benchmark for future development. We propose that an open source, community-wide platform for model-data intercomparison is needed to speed model development and to strengthen ties between modeling and measurement communities. Important next steps include the design and analysis of land use change simulations (in both uncoupled and coupled modes), and the entrainment of additional ecological and earth system observations. Model results from C-LAMP are publicly available on the Earth System Grid.},
doi = {10.1111/j.1365-2486.2009.01912.x},
url = {https://www.osti.gov/biblio/963697}, journal = {Global Change Biology},
issn = {1354-1013},
number = 9,
volume = 15,
place = {United States},
year = {2009},
month = {1}
}

Works referenced in this record:

Combined climate and carbon-cycle effects of large-scale deforestation
journal, April 2007


The Earth System Grid: Supporting the Next Generation of Climate Modeling Research
journal, March 2005


Mapping U.S. forest biomass using nationwide forest inventory data and moderate resolution information
journal, April 2008


Hurricane Katrina's Carbon Footprint on U.S. Gulf Coast Forests
journal, November 2007


Regional evaporation estimates from flux tower and MODIS satellite data
journal, February 2007


Amazonian forest dieback under climate-carbon cycle projections for the 21st century
journal, April 2004


Acceleration of global warming due to carbon-cycle feedbacks in a coupled climate model
journal, November 2000


The Orbiting Carbon Observatory (OCO) mission
journal, January 2004


Temperature sensitivity of soil carbon decomposition and feedbacks to climate change
journal, March 2006


Comparing net ecosystem exchange of carbon dioxide between an old-growth and mature forest in the upper Midwest, USA
journal, January 2005


The Community Land Model and Its Climate Statistics as a Component of the Community Climate System Model
journal, June 2006


Interactive Canopies for a Climate Model
journal, November 1998


Natural Variability in a Stable, 1000-Yr Global Coupled Climate–Carbon Cycle Simulation
journal, July 2006


Seasonality of ecosystem respiration and gross primary production as derived from FLUXNET measurements
journal, December 2002


Feedbacks of Terrestrial Ecosystems to Climate Change
journal, November 2007


Effects of selective logging on tropical forest tree growth: SELECTIVE LOGGING IN AMAZONIA
journal, March 2008

  • Figueira, Adelaine Michela e. S.; Miller, Scott D.; de Sousa, Cleilim Albert D.
  • Journal of Geophysical Research: Biogeosciences, Vol. 113, Issue G1
  • https://doi.org/10.1029/2007JG000577

Positive feedback between future climate change and the carbon cycle
journal, April 2001


Climate–Carbon Cycle Feedback Analysis: Results from the C 4 MIP Model Intercomparison
journal, July 2006


How positive is the feedback between climate change and the carbon cycle?
journal, April 2003


Toward an allocation scheme for global terrestrial carbon models
journal, October 1999


Evolution of carbon sinks in a changing climate
journal, August 2005


Global estimation of burned area using MODIS active fire observations
journal, January 2006


Transcom 3 inversion intercomparison: Model mean results for the estimation of seasonal carbon sources and sinks: T3 SEASONAL RESULTS
journal, January 2004


Evaluation of remote sensing based terrestrial productivity from MODIS using regional tower eddy flux network observations
journal, July 2006


CO 2 fertilization in temperate FACE experiments not representative of boreal and tropical forests
journal, July 2008


The spatial distribution of forest biomass in the Brazilian Amazon: a comparison of estimates
journal, October 2001


Assimilating atmospheric data into a terrestrial biosphere model: A case study of the seasonal cycle: ASSIMILATING CO
journal, October 2002


Long-term sensitivity of soil carbon turnover to warming
journal, January 2005


The Partitioning of Evapotranspiration into Transpiration, Soil Evaporation, and Canopy Evaporation in a GCM: Impacts on Land–Atmosphere Interaction
journal, August 2007


Nitrogen Limitation of net Primary Productivity in Terrestrial Ecosystems is Globally Distributed
journal, February 2008


Carbon allocation in forest ecosystems
journal, October 2007


Comprehensive assessment of carbon productivity, allocation and storage in three Amazonian forests
journal, May 2009


Extension and integration of atmospheric carbon dioxide data into a globally consistent measurement record
journal, January 1995


North American forest disturbance mapped from a decadal Landsat record
journal, June 2008


Impacts of Fine Root Turnover on Forest NPP and Soil C Sequestration Potential
journal, November 2003


What determines the magnitude of carbon cycle-climate feedbacks?: CARBON CYCLE-CLIMATE FEEDBACKS
journal, May 2007


THE WCRP CMIP3 Multimodel Dataset: A New Era in Climate Change Research
journal, September 2007


Biometric and Micrometeorological Measurements of Tropical Forest Carbon Balance
journal, August 2004


Comparing and evaluating process-based ecosystem model predictions of carbon and water fluxes in major European forest biomes
journal, December 2005


Development of a global evapotranspiration algorithm based on MODIS and global meteorology data
journal, December 2007


Global products of vegetation leaf area and fraction absorbed PAR from year one of MODIS data
journal, November 2002


Contribution of ocean, fossil fuel, land biosphere, and biomass burning carbon fluxes to seasonal and interannual variability in atmospheric CO 2 : SEASONAL AND INTERANNUAL CO
journal, February 2008


Forest response to elevated CO2 is conserved across a broad range of productivity
journal, December 2005


Improvements to the Community Land Model and their impact on the hydrological cycle: COMMUNITY LAND MODEL HYDROLOGY
journal, March 2008


The amount of carbon released from peat and forest fires in Indonesia during 1997
journal, November 2002


Global-Scale Similarities in Nitrogen Release Patterns During Long-Term Decomposition
journal, January 2007


Terrestrial ecosystem production: A process model based on global satellite and surface data
journal, December 1993


Simulation of Global Land Surface Conditions from 1948 to 2004. Part I: Forcing Data and Evaluations
journal, October 2006


The contribution of terrestrial sources and sinks to trends in the seasonal cycle of atmospheric carbon dioxide
journal, December 1997


Leaf Demography and Phenology in Amazonian rain Forest: a Census of 40 000 Leaves of 23 tree Species
journal, January 2004


CLIMATE CHANGE: Ecosystem Disturbance, Carbon, and Climate
journal, August 2008


Distribution of aboveground live biomass in the Amazon basin: AGLB IN THE AMAZON BASIN
journal, January 2007


First operational BRDF, albedo nadir reflectance products from MODIS
journal, November 2002


Continental Scale Variability in Ecosystem Processes: Models, Data, and the role of Disturbance
journal, May 1997


Weak Northern and Strong Tropical Land Carbon Uptake from Vertical Profiles of Atmospheric CO2
journal, June 2007


Use of FLUXNET in the Community Land Model development: USE OF FLUXNET IN THE CLM DEVELOPMENT
journal, March 2008


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


Modeling and measuring the effects of disturbance history and climate on carbon and water budgets in evergreen needleleaf forests
journal, December 2002


An Improved Canopy Integration Scheme for a Land Surface Model with Prognostic Canopy Structure
journal, August 2007


Climate regulation of fire emissions and deforestation in equatorial Asia
journal, December 2008


Interannual variability in global biomass burning emissions from 1997 to 2004
journal, January 2006


Forest structure and carbon dynamics in Amazonian tropical rain forests
journal, June 2004


Validation of the land-surface temperature products retrieved from Terra Moderate Resolution Imaging Spectroradiometer data
journal, November 2002


Comparing independent estimates of carbon dioxide exchange over 5 years at a deciduous forest in the southeastern United States
journal, December 2001


New constraints on Northern Hemisphere growing season net flux
journal, January 2007


Rates of litter decomposition in terrestrial ecosystems: global patterns and controlling factors
journal, March 2008


Sensitivity of Moderate Resolution Imaging Spectroradiometer (MODIS) terrestrial primary production to the accuracy of meteorological reanalyses
journal, January 2006


Improvements of the MODIS terrestrial gross and net primary production global data set
journal, March 2005