Integrating remotely sensed land cover observations and a biogeochemical model for estimating forest ecosystem carbon dynamics

Abstract Land cover change is one of the key driving forces for ecosystem carbon (C) dynamics. We present an approach for using sequential remotely sensed land cover observations and a biogeochemical model to estimate contemporary and future ecosystem carbon trends. We applied the General Ensemble Biogeochemical Modelling System (GEMS) for the Laurentian Plains and Hills ecoregion in the northeastern United States for the period of 1975–2025. The land cover changes, especially forest stand-replacing events, were detected on 30 randomly located 10-km by 10-km sample blocks, and were assimilated by GEMS for biogeochemical simulations. In GEMS, each unique combination of major controlling variables (including land cover change history) forms a geo-referenced simulation unit. For a forest simulation unit, a Monte Carlo process is used to determine forest type, forest age, forest biomass, and soil C, based on the Forest Inventory and Analysis (FIA) data and the U.S. General Soil Map (STATSGO) data. Ensemble simulations are performed for each simulation unit to incorporate input data uncertainty. Results show that on average forests of the Laurentian Plains and Hills ecoregion have been sequestrating 4.2 Tg C (1 teragram = 1012 gram) per year, including 1.9 Tg C removed from the ecosystem as the consequences of land cover change.

[1]  Richard A. Birdsey,et al.  Carbon trends of productive temperate forests of the coterminous United States , 1993 .

[2]  T. Loveland,et al.  Temporal evolution of carbon budgets of the Appalachian forests in the U.S. from 1972 to 2000 , 2006 .

[3]  J. Waddington,et al.  Cutover peatlands: A persistent source of atmospheric CO2 , 2002 .

[4]  Wayne S. Davis,et al.  Biological assessment and criteria : tools for water resource planning and decision making , 1995 .

[5]  W. Cohen,et al.  Site‐level evaluation of satellite‐based global terrestrial gross primary production and net primary production monitoring , 2005 .

[6]  P. E. Rasmussen,et al.  Long-Term Effects of Crop Management in Wheat-Fallow: II. CENTURY Model Simulations , 1994 .

[7]  J. Chen,et al.  Nitrogen controls on ecosystem carbon sequestration: A model implementation and application to Saskatchewan, Canada , 2005 .

[8]  P. Ciais,et al.  REGIONAL BIOSPHERIC CARBON FLUXES AS INFERRED FROM ATMOSPHERIC CO2 MEASUREMENTS , 2000 .

[9]  Martin Körschens,et al.  Simulating trends in soil organic carbon in long-term experiments using the century model , 1997 .

[10]  J. Houghton,et al.  Climate change : the IPCC scientific assessment , 1990 .

[11]  D. Price.  High resolution future scenario climate data for North America , 2004 .

[12]  N. H. Ravindranath,et al.  Land Use, Land-Use Change, and Forestry: A Special Report of the Intergovernmental Panel on Climate Change , 2000 .

[13]  R. Fisher,et al.  ORGANIC MATTER PRODUCTION AND DISTRIBUTION IN SLASH PINE (PINUS ELLIOTTII) PLANTATIONS , 1982 .

[14]  J. Omernik.  Ecoregions of the Conterminous United States , 1987 .

[15]  H. Delcourt,et al.  Carbon Budget of the Southeastern U.S. Biota: Analysis of Historical Change in Trend from Source to Sink , 1980, Science.

[16]  W. Parton,et al.  Ecological impact of historical and future land-use patterns in Senegal , 2004 .

[17]  Christopher B. Field,et al.  FOREST CARBON SINKS IN THE NORTHERN HEMISPHERE , 2002 .

[18]  R. Birdsey,et al.  Methodology for estimating soil carbon for the forest carbon budget model of the United States, 2001. , 2002, Environmental pollution.

[19]  Shuguang Liu,et al.  Impacts of land use and climate change on carbon dynamics in south-central Senegal , 2004 .

[20]  Robert J. Scholes,et al.  Observations and modeling of biomass and soil organic matter dynamics for the grassland biome worldwide , 1993 .

[21]  L. Heath,et al.  Soil carbon accounting and assumptions for forestry and forest-related land use change , 2000 .

[22]  Thomas R. Loveland,et al.  Contemporary Carbon Dynamics in Terrestrial Ecosystems in the Southeastern Plains of the United States , 2004 .

[23]  Shuguang Liu,et al.  Modeling carbon dynamics in vegetation and soil under the impact of soil erosion and deposition , 2003 .

[24]  P. Ciais,et al.  Consistent Land- and Atmosphere-Based U.S. Carbon Sink Estimates , 2001, Science.

[25]  Vemap Participants.  Vegetation/ecosystem modeling and analysis project: Comparing biogeography and biogeochemistry models in a continental-scale study of terrestrial ecosystem responses to climate change and CO2 doubling , 1995 .

[26]  Stephen V. Stehman,et al.  A Strategy for Estimating the Rates of Recent United States Land-Cover Changes , 2002 .

[27]  S. Carpenter,et al.  Global Consequences of Land Use , 2005, Science.

[28]  C. Johnston,et al.  Soil organic carbon dynamics as related to land use history in the northwestern Great Plains , 2005 .

[29]  S. Pacala,et al.  Projecting the future of the U.S. carbon sink , 2001, Proceedings of the National Academy of Sciences of the United States of America.

[30]  D. Jacob,et al.  The geochemical cycling of reactive chlorine through the marine troposphere , 1990 .

[31]  Scott V. Ollinger,et al.  Sources of Variability in Net Primary Production Predictions at a Regional Scale: A Comparison Using PnET-II and TEM 4.0 in Northeastern US Forests , 1999, Ecosystems.

[32]  P. Loveland,et al.  The carbon content of soil and its geographical distribution in Great Britain , 1995 .

[33]  Carter,et al.  Simulation of soil organic carbon and nitrogen changes in cereal and pasture systems of southern Australia , 1993 .

[34]  Houghton,et al.  The U.S. Carbon budget: contributions from land-Use change , 1999, Science.

[35]  R. K. Dixon,et al.  Carbon Pools and Flux of Global Forest Ecosystems , 1994, Science.

[36]  David P. Turner,et al.  A Carbon Budget for Forests of the Conterminous United States , 1995 .

[37]  Kenneth G. Gerow,et al.  Historical and future land use effects on N2O and NO emissions using an ensemble modeling approach: Costa Rica's Caribbean lowlands as an example , 2002 .

[38]  S W Pacala,et al.  Contributions of land-use history to carbon accumulation in U.S. forests. , 2000, Science.