Realized ecological forecast through an interactive Ecological Platform for Assimilating Data (EcoPAD, v1.0) into models
Abstract
Abstract. Predicting future changes in ecosystem services is not only highly desirable but is also becoming feasible as several forces (e.g., available big data, developed data assimilation (DA) techniques, and advanced cyber-infrastructure) are converging to transform ecological research into quantitative forecasting. To realize ecological forecasting, we have developed an Ecological Platform for Assimilating Data (EcoPAD, v1.0) into models. EcoPAD (v1.0) is a web-based software system that automates data transfer and processing from sensor networks to ecological forecasting through data management, model simulation, data assimilation, forecasting, and visualization. It facilitates interactive data–model integration from which the model is recursively improved through updated data while data are systematically refined under the guidance of model. EcoPAD (v1.0) relies on data from observations, process-oriented models, DA techniques, and the web-based workflow. We applied EcoPAD (v1.0) to the Spruce and Peatland Responses Under Climatic and Environmental change (SPRUCE) experiment in northern Minnesota. The EcoPAD-SPRUCE realizes fully automated data transfer, feeds meteorological data to drive model simulations, assimilates both manually measured and automated sensor data into the Terrestrial ECOsystem (TECO) model, and recursively forecasts the responses of various biophysical and biogeochemical processes to five temperature and two CO2 treatments in near-real time (weekly). Forecasting with EcoPAD-SPRUCEmore »
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1503360
- Alternate Identifier(s):
- OSTI ID: 1503989
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Published Article
- Journal Name:
- Geoscientific Model Development (Online)
- Additional Journal Information:
- Journal Name: Geoscientific Model Development (Online) Journal Volume: 12 Journal Issue: 3; Journal ID: ISSN 1991-9603
- Publisher:
- Copernicus Publications, EGU
- Country of Publication:
- Germany
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Huang, Yuanyuan, Stacy, Mark, Jiang, Jiang, Sundi, Nilutpal, Ma, Shuang, Saruta, Volodymyr, Jung, Chang Gyo, Shi, Zheng, Xia, Jianyang, Hanson, Paul J., Ricciuto, Daniel, and Luo, Yiqi. Realized ecological forecast through an interactive Ecological Platform for Assimilating Data (EcoPAD, v1.0) into models. Germany: N. p., 2019.
Web. doi:10.5194/gmd-12-1119-2019.
Huang, Yuanyuan, Stacy, Mark, Jiang, Jiang, Sundi, Nilutpal, Ma, Shuang, Saruta, Volodymyr, Jung, Chang Gyo, Shi, Zheng, Xia, Jianyang, Hanson, Paul J., Ricciuto, Daniel, & Luo, Yiqi. Realized ecological forecast through an interactive Ecological Platform for Assimilating Data (EcoPAD, v1.0) into models. Germany. https://doi.org/10.5194/gmd-12-1119-2019
Huang, Yuanyuan, Stacy, Mark, Jiang, Jiang, Sundi, Nilutpal, Ma, Shuang, Saruta, Volodymyr, Jung, Chang Gyo, Shi, Zheng, Xia, Jianyang, Hanson, Paul J., Ricciuto, Daniel, and Luo, Yiqi. Mon .
"Realized ecological forecast through an interactive Ecological Platform for Assimilating Data (EcoPAD, v1.0) into models". Germany. https://doi.org/10.5194/gmd-12-1119-2019.
@article{osti_1503360,
title = {Realized ecological forecast through an interactive Ecological Platform for Assimilating Data (EcoPAD, v1.0) into models},
author = {Huang, Yuanyuan and Stacy, Mark and Jiang, Jiang and Sundi, Nilutpal and Ma, Shuang and Saruta, Volodymyr and Jung, Chang Gyo and Shi, Zheng and Xia, Jianyang and Hanson, Paul J. and Ricciuto, Daniel and Luo, Yiqi},
abstractNote = {Abstract. Predicting future changes in ecosystem services is not only highly desirable but is also becoming feasible as several forces (e.g., available big data, developed data assimilation (DA) techniques, and advanced cyber-infrastructure) are converging to transform ecological research into quantitative forecasting. To realize ecological forecasting, we have developed an Ecological Platform for Assimilating Data (EcoPAD, v1.0) into models. EcoPAD (v1.0) is a web-based software system that automates data transfer and processing from sensor networks to ecological forecasting through data management, model simulation, data assimilation, forecasting, and visualization. It facilitates interactive data–model integration from which the model is recursively improved through updated data while data are systematically refined under the guidance of model. EcoPAD (v1.0) relies on data from observations, process-oriented models, DA techniques, and the web-based workflow. We applied EcoPAD (v1.0) to the Spruce and Peatland Responses Under Climatic and Environmental change (SPRUCE) experiment in northern Minnesota. The EcoPAD-SPRUCE realizes fully automated data transfer, feeds meteorological data to drive model simulations, assimilates both manually measured and automated sensor data into the Terrestrial ECOsystem (TECO) model, and recursively forecasts the responses of various biophysical and biogeochemical processes to five temperature and two CO2 treatments in near-real time (weekly). Forecasting with EcoPAD-SPRUCE has revealed that mismatches in forecasting carbon pool dynamics are more related to model (e.g., model structure, parameter, and initial value) than forcing variables, opposite to forecasting flux variables. EcoPAD-SPRUCE quantified acclimations of methane production in response to warming treatments through shifted posterior distributions of the CH4:CO2 ratio and the temperature sensitivity (Q10) of methane production towards lower values. Different case studies indicated that realistic forecasting of carbon dynamics relies on appropriate model structure, correct parameterization, and accurate external forcing. Moreover, EcoPAD-SPRUCE stimulated active feedbacks between experimenters and modelers to identify model components to be improved and additional measurements to be taken. It has become an interactive model–experiment (ModEx) system and opens a novel avenue for interactive dialogue between modelers and experimenters. Altogether, EcoPAD (v1.0) acts to integrate multiple sources of information and knowledge to best inform ecological forecasting.},
doi = {10.5194/gmd-12-1119-2019},
journal = {Geoscientific Model Development (Online)},
number = 3,
volume = 12,
place = {Germany},
year = {Mon Mar 25 00:00:00 EDT 2019},
month = {Mon Mar 25 00:00:00 EDT 2019}
}
https://doi.org/10.5194/gmd-12-1119-2019
Web of Science
Works referenced in this record:
Coordinated approaches to quantify long-term ecosystem dynamics in response to global change: LONG-TERM GLOBAL CHANGE EXPERIMENTS
journal, January 2011
- Luo, Yiqi; Melillo, Jerry; Niu, Shuli
- Global Change Biology, Vol. 17, Issue 2
Real-Time Epidemic Monitoring and Forecasting of H1N1-2009 Using Influenza-Like Illness from General Practice and Family Doctor Clinics in Singapore
journal, April 2010
- Ong, Jimmy Boon Som; Chen, Mark I-Cheng; Cook, Alex R.
- PLoS ONE, Vol. 5, Issue 4
Forecasting the effects of accelerated sea-level rise on tidal marsh ecosystem services
journal, March 2009
- Craft, Christopher; Clough, Jonathan; Ehman, Jeff
- Frontiers in Ecology and the Environment, Vol. 7, Issue 2
Forecasting phenology: from species variability to community patterns: Phenological variation across scales
journal, March 2012
- Diez, Jeffrey M.; Ibáñez, Inés; Miller-Rushing, Abraham J.
- Ecology Letters, Vol. 15, Issue 6
Attaining whole-ecosystem warming using air and deep-soil heating methods with an elevated CO 2 atmosphere
journal, January 2017
- Hanson, Paul J.; Riggs, Jeffery S.; Nettles, W. Robert
- Biogeosciences, Vol. 14, Issue 4
Effects of elevated [CO2] on photosynthesis in European forest species: a meta-analysis of model parameters: Photosynthetic acclimation to elevated CO2
journal, December 1999
- Medlyn, B. E.; Badeck, F. -W.; De Pury, D. G. G.
- Plant, Cell & Environment, Vol. 22, Issue 12
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
- Walker, Anthony P.; Hanson, Paul J.; De Kauwe, Martin G.
- Journal of Geophysical Research: Biogeosciences, Vol. 119, Issue 5
The Competition Box: A Graphical Aid to Forecasting Pollinator Performance
journal, November 1995
- Corbet, Sarah A.; Saville, N. M.; Fussell, M.
- The Journal of Applied Ecology, Vol. 32, Issue 4
Correlative and mechanistic models of species distribution provide congruent forecasts under climate change: Congruence of correlative and mechanistic distribution models
journal, January 2010
- Kearney, Michael R.; Wintle, Brendan A.; Porter, Warren P.
- Conservation Letters, Vol. 3, Issue 3
Peatland Biogeochemistry and Watershed Hydrology at the Marcell Experimental Forest
book, January 2011
- Kolka, Randall; Sebestyen, Stephen; Verry, Elon S.
- CRC Press
A global model of carbon, nitrogen and phosphorus cycles for the terrestrial biosphere
journal, January 2010
- Wang, Y. P.; Law, R. M.; Pak, B.
- Biogeosciences, Vol. 7, Issue 7
Repeatability and transparency in ecological research
journal, September 2010
- Ellison, Aaron M.
- Ecology, Vol. 91, Issue 9
Relative information contributions of model vs. data to short- and long-term forecasts of forest carbon dynamics
journal, July 2011
- Weng, Ensheng; Luo, Yiqi
- Ecological Applications, Vol. 21, Issue 5
Propagating uncertainty through prognostic carbon cycle data assimilation system simulations
journal, January 2007
- Scholze, M.; Kaminski, T.; Rayner, P.
- Journal of Geophysical Research, Vol. 112, Issue D17
Projected ecosystem impact of the Prairie Heating and CO 2 Enrichment experiment
journal, June 2007
- Parton, William J.; Morgan, Jack A.; Wang, Guiming
- New Phytologist, Vol. 174, Issue 4
Data-Constrained Projections of Methane Fluxes in a Northern Minnesota Peatland in Response to Elevated CO 2 and Warming : Data-Constrained Forecast of CH
journal, November 2017
- Ma, Shuang; Jiang, Jiang; Huang, Yuanyuan
- Journal of Geophysical Research: Biogeosciences, Vol. 122, Issue 11
Robustness and uncertainty in terrestrial ecosystem carbon response to CMIP5 climate change projections
journal, October 2012
- Ahlström, A.; Schurgers, G.; Arneth, A.
- Environmental Research Letters, Vol. 7, Issue 4
Plant extinction risk under climate change: are forecast range shifts alone a good indicator of species vulnerability to global warming?
journal, January 2012
- Fordham, Damien A.; Resit Akçakaya, H.; Araújo, Miguel B.
- Global Change Biology, Vol. 18, Issue 4
Detecting Causality in Complex Ecosystems
journal, September 2012
- Sugihara, G.; May, R.; Ye, H.
- Science, Vol. 338, Issue 6106
Ecological Forecasts: An Emerging Imperative
journal, July 2001
- Clark, J. S.
- Science, Vol. 293, Issue 5530
Exploring the difficulties of studying futures in ecology: what do ecological scientists think?
journal, May 2010
- Coreau, Audrey; Treyer, Sébastien; Cheptou, Pierre-Olivier
- Oikos, Vol. 119, Issue 8
Time to model all life on Earth
journal, January 2013
- Purves, Drew; Scharlemann, Jörn P. W.; Harfoot, Mike
- Nature, Vol. 493, Issue 7432
Ecological forecasting and data assimilation in a data-rich era
journal, July 2011
- Luo, Yiqi; Ogle, Kiona; Tucker, Colin
- Ecological Applications, Vol. 21, Issue 5
The role of data assimilation in predictive ecology
journal, May 2014
- Niu, Shuli; Luo, Yiqi; Dietze, Michael C.
- Ecosphere, Vol. 5, Issue 5
Soil thermal dynamics, snow cover, and frozen depth under five temperature treatments in an ombrotrophic bog: Constrained forecast with data assimilation: Forecast With Data Assimilation
journal, August 2017
- Huang, Yuanyuan; Jiang, Jiang; Ma, Shuang
- Journal of Geophysical Research: Biogeosciences, Vol. 122, Issue 8
Prediction, precaution, and policy under global change
journal, February 2015
- Schindler, Daniel E.; Hilborn, Ray
- Science, Vol. 347, Issue 6225
Soil hydrological properties regulate grassland ecosystem responses to multifactor global change: A modeling analysis
journal, January 2008
- Weng, Ensheng; Luo, Yiqi
- Journal of Geophysical Research, Vol. 113, Issue G3
Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world
journal, October 2017
- Melillo, J. M.; Frey, S. D.; DeAngelis, K. M.
- Science, Vol. 358, Issue 6359
Skill assessment for an operational algal bloom forecast system
journal, February 2009
- Stumpf, Richard P.; Tomlinson, Michelle C.; Calkins, Julie A.
- Journal of Marine Systems, Vol. 76, Issue 1-2
Complexity is costly: a meta-analysis of parametric and non-parametric methods for short-term population forecasting
journal, February 2014
- Ward, Eric J.; Holmes, Eli E.; Thorson, James T.
- Oikos, Vol. 123, Issue 6
A Model Predicting Stomatal Conductance and its Contribution to the Control of Photosynthesis under Different Environmental Conditions
book, January 1987
- Ball, J. Timothy; Woodrow, Ian E.; Berry, Joseph A.
- Progress in Photosynthesis Research
REVIEW: Predictive ecology in a changing world
journal, July 2015
- Mouquet, Nicolas; Lagadeuc, Yvan; Devictor, Vincent
- Journal of Applied Ecology, Vol. 52, Issue 5
How close are we to a predictive science of the biosphere?
journal, July 2006
- Moorcroft, Paul R.
- Trends in Ecology & Evolution, Vol. 21, Issue 7
Web technologies for environmental Big Data
journal, January 2015
- Vitolo, Claudia; Elkhatib, Yehia; Reusser, Dominik
- Environmental Modelling & Software, Vol. 63
Using model-data fusion to interpret past trends, and quantify uncertainties in future projections, of terrestrial ecosystem carbon cycling
journal, April 2012
- Keenan, Trevor F.; Davidson, Eric; Moffat, Antje M.
- Global Change Biology, Vol. 18, Issue 8
Long-Term Ecological Research in a Human-Dominated World
journal, April 2012
- Robertson, G. Philip; Collins, Scott L.; Foster, David R.
- BioScience, Vol. 62, Issue 4
Forecasting the Effects of Global Warming on Biodiversity
journal, March 2007
- Botkin, Daniel B.; Saxe, Henrik; Araújo, Miguel B.
- BioScience, Vol. 57, Issue 3
A two-leaf model for canopy conductance, photosynthesis and partitioning of available energy I:
journal, May 1998
- Wang, Y. -P.; Leuning, R.
- Agricultural and Forest Meteorology, Vol. 91, Issue 1-2
Global soil carbon projections are improved by modelling microbial processes
journal, July 2013
- Wieder, William R.; Bonan, Gordon B.; Allison, Steven D.
- Nature Climate Change, Vol. 3, Issue 10
Forecasting Responses of a Northern Peatland Carbon Cycle to Elevated CO 2 and a Gradient of Experimental Warming
journal, March 2018
- Jiang, Jiang; Huang, Yuanyuan; Ma, Shuang
- Journal of Geophysical Research: Biogeosciences, Vol. 123, Issue 3
Big data and the future of ecology
journal, April 2013
- Hampton, Stephanie E.; Strasser, Carly A.; Tewksbury, Joshua J.
- Frontiers in Ecology and the Environment, Vol. 11, Issue 3
A new crop yield forecasting model based on satellite measurements applied across the Indus Basin, Pakistan
journal, March 2003
- Bastiaanssen, Wim G. M.; Ali, Samia
- Agriculture, Ecosystems & Environment, Vol. 94, Issue 3
Evaluation of the terrestrial carbon cycle, future plant geography and climate-carbon cycle feedbacks using five Dynamic Global Vegetation Models (DGVMs)
journal, September 2008
- Sitch, S.; Huntingford, C.; Gedney, N.
- Global Change Biology, Vol. 14, Issue 9
Estimating Population Spread: what can we Forecast and how Well?
journal, August 2003
- Clark, James S.; Lewis, Mark; McLachlan, Jason S.
- Ecology, Vol. 84, Issue 8
The limits to prediction in ecological systems
journal, November 2011
- Beckage, Brian; Gross, Louis J.; Kauffman, Stuart
- Ecosphere, Vol. 2, Issue 11
On improving the communication between models and data: Communication between models and data
journal, January 2013
- Dietze, Michael C.; Lebauer, David S.; Kooper, Rob
- Plant, Cell & Environment, Vol. 36, Issue 9
Model-free forecasting outperforms the correct mechanistic model for simulated and experimental data
journal, February 2013
- Perretti, C. T.; Munch, S. B.; Sugihara, G.
- Proceedings of the National Academy of Sciences, Vol. 110, Issue 13
Toward more realistic projections of soil carbon dynamics by Earth system models: SOIL CARBON MODELING
journal, January 2016
- Luo, Yiqi; Ahlström, Anders; Allison, Steven D.
- Global Biogeochemical Cycles, Vol. 30, Issue 1
Acclimatization of soil respiration to warming in a tall grass prairie
journal, October 2001
- Luo, Yiqi; Wan, Shiqiang; Hui, Dafeng
- Nature, Vol. 413, Issue 6856
TreeWatch.net: A Water and Carbon Monitoring and Modeling Network to Assess Instant Tree Hydraulics and Carbon Status
journal, July 2016
- Steppe, Kathy; von der Crone, Jonas S.; De Pauw, Dirk J. W.
- Frontiers in Plant Science, Vol. 7
The rise of research on futures in ecology: rebalancing scenarios and predictions: Ecological futures research
journal, October 2009
- Coreau, Audrey; Pinay, Gilles; Thompson, John D.
- Ecology Letters, Vol. 12, Issue 12
The era of continental‐scale ecology
journal, August 2011
- Schimel, David
- Frontiers in Ecology and the Environment, Vol. 9, Issue 6
Uncertainty analysis of forest carbon sink forecast with varying measurement errors: a data assimilation approach
journal, June 2011
- Weng, Ensheng; Luo, Yiqi; Gao, Chao
- Journal of Plant Ecology, Vol. 4, Issue 3
Accounting for uncertainty in ecological analysis: the strengths and limitations of hierarchical statistical modeling
journal, April 2009
- Cressie, Noel; Calder, Catherine A.; Clark, James S.
- Ecological Applications, Vol. 19, Issue 3
The Data Assimilation Research Testbed: A Community Facility
journal, September 2009
- Anderson, Jeffrey; Hoar, Tim; Raeder, Kevin
- Bulletin of the American Meteorological Society, Vol. 90, Issue 9
Experimental warming altered rates of carbon processes, allocation, and carbon storage in a tallgrass prairie
journal, November 2015
- Shi, Zheng; Xu, Xia; Hararuk, Oleksandra
- Ecosphere, Vol. 6, Issue 11
Facilitating feedbacks between field measurements and ecosystem models
journal, May 2013
- LeBauer, David S.; Wang, Dan; Richter, Katherine T.
- Ecological Monographs, Vol. 83, Issue 2
Ecoinformatics: supporting ecology as a data-intensive science
journal, February 2012
- Michener, William K.; Jones, Matthew B.
- Trends in Ecology & Evolution, Vol. 27, Issue 2
Assimilation of multiple data sets with the ensemble Kalman filter to improve forecasts of forest carbon dynamics
journal, July 2011
- Gao, Chao; Wang, Han; Weng, Ensheng
- Ecological Applications, Vol. 21, Issue 5
Probabilistic inversion of a terrestrial ecosystem model: Analysis of uncertainty in parameter estimation and model prediction: PROBABILISTIC INVERSION OF TERRESTRIAL ECOSYSTEM
journal, May 2006
- Xu, Tao; White, Luther; Hui, Dafeng
- Global Biogeochemical Cycles, Vol. 20, Issue 2
The decadal state of the terrestrial carbon cycle: Global retrievals of terrestrial carbon allocation, pools, and residence times
journal, January 2016
- Bloom, A. Anthony; Exbrayat, Jean-François; van der Velde, Ivar R.
- Proceedings of the National Academy of Sciences, Vol. 113, Issue 5
Estimating diurnal to annual ecosystem parameters by synthesis of a carbon flux model with eddy covariance net ecosystem exchange observations
journal, February 2005
- Braswell, Bobby H.; Sacks, William J.; Linder, Ernst
- Global Change Biology, Vol. 11, Issue 2
Spatial patterns of ecosystem carbon residence time and NPP-driven carbon uptake in the conterminous United States: CARBON RESIDENCE TIME AND CARBON UPTAKE
journal, September 2008
- Zhou, Tao; Luo, Yiqi
- Global Biogeochemical Cycles, Vol. 22, Issue 3
A biochemical model of photosynthetic CO2 assimilation in leaves of C3 species
journal, June 1980
- Farquhar, G. D.; von Caemmerer, S.; Berry, J. A.
- Planta, Vol. 149, Issue 1
Scientific workflow management and the Kepler system
journal, January 2006
- Ludäscher, Bertram; Altintas, Ilkay; Berkley, Chad
- Concurrency and Computation: Practice and Experience, Vol. 18, Issue 10
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
- Schaefer, Kevin; Schwalm, Christopher R.; Williams, Chris
- Journal of Geophysical Research: Biogeosciences, Vol. 117, Issue G3
Forecasting the dynamics of a coastal fishery species using a coupled climate–population model
journal, March 2010
- Hare, Jonathan A.; Alexander, Michael A.; Fogarty, Michael J.
- Ecological Applications, Vol. 20, Issue 2
Inverse analysis of coupled carbon–nitrogen cycles against multiple datasets at ambient and elevated CO 2
journal, September 2015
- Shi, Zheng; Yang, Yuanhe; Zhou, Xuhui
- Journal of Plant Ecology, Vol. 9, Issue 3
Methods for estimating temperature sensitivity of soil organic matter based on incubation data: A comparative evaluation
journal, January 2015
- Liang, Junyi; Li, Dejun; Shi, Zheng
- Soil Biology and Biochemistry, Vol. 80
Clear and Precise Specification of Ecological Data Management Processes and Dataset Provenance
journal, January 2010
- Osterweil, L. J.; Clarke, L. A.; Ellison, A. M.
- IEEE Transactions on Automation Science and Engineering, Vol. 7, Issue 1
Uncertainties in carbon residence time and NPP-driven carbon uptake in terrestrial ecosystems of the conterminous USA: a Bayesian approach
journal, January 2012
- Zhou, Xuhui; Zhou, Tao; Luo, Yiqi
- Tellus B: Chemical and Physical Meteorology, Vol. 64, Issue 1
Leveraging 35 years of Pinus taeda research in the southeastern US to constrain forest carbon cycle predictions: regional data assimilation using ecosystem experiments
journal, January 2017
- Thomas, R. Quinn; Brooks, Evan B.; Jersild, Annika L.
- Biogeosciences, Vol. 14, Issue 14
Citizen science: a new approach to advance ecology, education, and conservation
journal, November 2015
- Kobori, Hiromi; Dickinson, Janis L.; Washitani, Izumi
- Ecological Research, Vol. 31, Issue 1
The history of public participation in ecological research
journal, August 2012
- Miller-Rushing, Abraham; Primack, Richard; Bonney, Rick
- Frontiers in Ecology and the Environment, Vol. 10, Issue 6
A new stepwise carbon cycle data assimilation system using multiple data
streams to constrain the simulated land surface carbon cycle
journal, January 2016
- Peylin, Philippe; Bacour, Cédric; MacBean, Natasha
- Geoscientific Model Development, Vol. 9, Issue 9
Dynamics of C, N, P and S in grassland soils: a model
journal, February 1988
- Parton, W. J.; Stewart, J. W. B.; Cole, C. V.
- Biogeochemistry, Vol. 5, Issue 1
Development of airborne remote sensing instrumentations for NEON
conference, August 2010
- Johnson, Brian R.; Kampe, Thomas U.; Kuester, Michele
- SPIE Optical Engineering + Applications, SPIE Proceedings