Department of Forestry
 

David Arthur Sampson - Research Scientist

Selected Research Interests

    My research interests are currently focused on the continued development and implementation of my hybrid ecosystem process model, termed SECRETS_3PG. This model is a multi-species, multiple structure carbon and water flux simulator that now enables rotation length simulations. Traditional stand attributes, such as DBH, height, volume, etc. can now be simulated using the biometrically accurate C allocation scheme as found in 3-PG. Thus, the model permits flux comparisons but also comparisons of stand structure and canopy architecture from seedling to maturity.

    I am also focused on the development of a dynamic, multi-scale hyperspace model that will permit regional scale simulations of terrestrial ecosystem processes using surface, near-surface, and remotely sensed data. This will be a series of coupled models of varying complexity operating at multiple scales.

Selected Publications

  • Sampson, D. A., R. H. Wynne, and J. R. Seiler. 2008. Edaphic and climatic effects on forest stand development, net primary production, and net ecosystem productivity simulated for Coastal Plain loblolly pine in Virginia, Journal Geophysical Research, 113, G01003, doi: 10.1029/2006JG000270

  • Sampson, D.A., R.H. Wynne, and J.M. Seiler (2007).  Edaphic and climatic effects on forest stand development, NPP, and NEP simulated for Coastal Plain loblolly in Virginia, USA.  JGR-Biogeosciences (accepted).

  • Sampson, D.A., I.A. Janssens, J. Curiel Yuste, and R. Ceulemans. 2007.  Basal rates of soil respiration are correlated with photosynthesis in a mixed temperate forest. Global Change Biology 13: 2008-2017.

  • Tyree, M.C., Seiler, J.R., Aust, W.M., Sampson, D.A., and Fox, T.R. 2006.  Long-term effects of site preparation and fertilization on total soil CO2 efflux and heterotrophic respiration in a 33-year-old Pinus taeda L. plantation on the wet flats of the Virginia Lower Coastal Plain.  Forest Ecology and Management 234: 363-369.

  • Sampson, D.A., I. A. Janssens, and R. Ceulemans. 2006.  Under-story contributions to stand level GPP using the process model SECRETS.  Agricultural and Forest Meteorology 139: 94-104.

  • Siqueira, M.B., Katul, G.G., Sampson, D.A., Stoy, P.C., Juang, J.-Y., McCarthy, H.R., and Oren, R. 2006.  Multi-scale model inter-comparisons of CO2 and H2O exchange rates in a maturing southeastern U.S. pine forest.  Global Change Biology 12: 1189-1207.

  • Sampson, D.A., Waring, R.H., Maier, C.A., Gough, D.M., Ducey, M.J., Johnsen, K.H. 2006.  Fertilization effects on forest carbon storage and exchange and net primary production; a new hybrid process model for stand management.  Forest Ecology and Management 221: 91-109.

  • Sampson, D.A., Albaugh, T.A., and Johnsen, K.H., Allen, H.L. and Zarnoch, S.J.  2003.  Monthly leaf area index estimates from point-in-time measurements and needle phenology for Pinus taeda. Canadian Journal of Forest Research 33: 2477-2490.

  • Gough, C.M., Seiler, J.R., Johnsen, K., and Sampson, D.A.  2003.  Seasonal photosynthesis in fertilized and non-fertilized loblolly pine.  Forest Science 50: 1-9.

  • Meiresonne, L., Sampson, D.A., Kowalski, A.S., Janssens, I.A., Nadezhdina, N., Cermak, J., Van Slycken, J., and Ceulemans, R.  2003.  Water flux estimates from a Belgian Scots pine stand: A comparison of different approaches.  Journal of Hydrology 270: 230-252.

  • Deckmyn,G., Ceulemans, R., Rasse, D., Sampson, D.A., Garcia, J., and Muys, B.  2003.  Modeling the carbon sequestration of a mixed, uneven-aged, managed forest using the process model SECRETS. Pp. 143-155 IN: Amaro, A., Reed, D., and Soares, P. (eds).  Modelling Forest Systems. CABI Publishing, Wallingford, UK.

  • Lin J., Sampson D.A., Deckmyn, G., and Ceulemans, R.  2002.  Significant overestimation of needle surface area estimates based on needle dimensional in Scots pine trees (Pinus sylvestris L.).  Canadian Journal of Botany 80: 927-932.

  • Janssens I.A., Sampson D.A., Curiel-Yuste J., Carrara A., and Ceulemans, R.  2002.  The carbon cost of fine root turnover in a Scots pine forest.  Forest Ecology and Management 168: 233-242.

  • Lin, J., Sampson, D.A., and Ceulemans, R.  2001.  The effect of crown position and tree age on resin-canal density in Scots pine (Pinus sylvestris L.) needles.  Canadian Journal of Botany 79:  1257-1261.

  • Sampson D.A., Johnsen K.H., Ludovici K.H., Albaugh T.J., and Maier C.  2001.  Stand scale correspondence in empirical and simulated labile carbohydrates in loblolly pine.  Forest Science 47: 60-68.

  • Sampson D.A., Janssens I.E., and Ceulemans R.  2001.  Simulated soil CO2 efflux and net ecosystem exchange in a 70-year-old Belgian Scots pine stand using the process model SECRETS.  Annals of Forest Science 58: 31- 46.

Selected Research Presentations

Invited Papers

  • "Using the process model BIOMASS to simulate southern pine net canopy assimilation" Sampson, D.A. Oral presentation: "Toward and application of Process Models to Sustainable Management of Southern Pine Forests." 7-10 June, 1999, Asheville, North Carolina, USA.
  • "Carbon and water fluxes of a mixed forest ecosystem; analyses using SECRETS, a forest process model". Seminar Series. 17 September, 1998, Laboratory for planetary and atmospheric physics, University of Liege, Liege, Belgium.

Software Development

  • SECRETS-3PG version 1.301. A rotation-length adaptation of SECRETS 3.9 for loblolly pine that includes the biometrically accurate 3PG biomass allocation code.
  • FHS; Forest Health Simulator. A process-oriented simulator to model forest health.
  • SECRETS version 3.9 - Stand to Ecosystem CaRbon and EvapoTranspiration Simulator. A stand to ecosystem-scale multiple patch, multi-species process model (Carbon and water fluxes and Net Ecosystem Exchange).
  • BIOMASS version 13.0 and 14.0 - A stand-level forest process model adapted to loblolly pine.

Downloadable Software

Process Models

SECRETS-3PG. Stay tuned for model updates.

    Please note, Virginia Polytechnic Institute and State University (hereafter VPI) nor Dr. David Arthur Sampson make no claim as to the correspondence, real, artificial, or imagined, of the outputs of this model to any independently acquired data. The SECRETS-3PG model has not been subject to is model has not subject to VPI policy review and should not be construed to represent the policies of the University. Any use of trade names in this model does not imply endorsement by the associated agencies of the products named, nor criticism of similar ones not mentioned. Copyright 2004 SECRETS-3PG version 1.301, a forest process simulation model. Dr. David Arthur Sampson, owner. All rights reserved.