1. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. THE DATA ASSIMILATION RESEARCH TESTBED (DART) FOR ECOLOGICAL FORECASTING Andy Fox 1, Tim Hoar 2, Kevin Raeder 2, Nancy Collins 2, Helen Kershaw 2 & Jeff Anderson 2 1.National Ecological Observatory Network 2.National Center for Atmospheric Research 1

2. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. DART is an open source community software facility for ensemble Data Assimilation Provides a variety of flavors of filters Many enhancements to basic filtering algorithms –Adaptive inflation –Localization Extensive documentation Includes a variety of instructional material with many interactive MATLAB tutorials Extensive state-space and observation-space diagnostics Building an interface between DART and a new model generally requires no modifications to model code What is DART? 2

3. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. 3 Weather models, e.g. WRF, COAMPS and MPAS-A and MPAS-O Components of climate models, e.g. CAM, POP, WACCM, MITgcm-Ocean Land surface models e.g. CLM, ED, NOAH, CABLE Ionosphere/thermosphere models, e.g. TIEGCM, GITM Low-order models such as the Lorenz models for assimilation research and educational use. DART works with dozens of models 3

4. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. 4 Temperature, winds aloft, surface winds, moisture from NCEP, MADIS, and SSEC Total precipitable water, radar observations, radio occultation observations from GPS satellites Ocean temperature and salinity from the World Ocean Database And assimilates dozens of observation types 4 Remotely-sensed land observations such as snow cover fraction, leaf area index and microwave brightness temperature observations In-situ land observations such as ground water depth, eddy covariance tower fluxes, cosmic ray neutron intensity

5. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. 5 48 UCAR member universities More than 100 other institutions DART is used at 5

6. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. DART @ NEON 6

7. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. DART @ NEON 7

8. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. DART @ NEON 8

9. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. DART @ NEON 9

10. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. DART @ NEON 10 Mean LAI and NEP from 80 ensemble members, 1 July 2005 Change in ensemble spread, 31 July 2005

11. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. “Enabling ecological forecasting is central to NEON, and the science vision that led to NEON’s conception involved advancing the ability to quantitatively predict, not just retroactively explain, ecological processes” (National Research Council 2003). 1.Predicting the most likely future state of an ecological system 2.Predicting the most likely future state, given a decision today Ecological forecasting @ NEON 11 http://www.neoninc.org/science/sciencestrategy The science strategy for the National Ecological Observatory Network is outlined in this document

12. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. Getting DART 12 http://www.image.ucar.edu/DAReS/DART has information about how to download DART from our subversion server, a full DART tutorial (included with the distribution), and how to contact us. Getting DART 12 Both The National Center for Atmospheric Research and The National Ecological Observatory Network are sponsored by the National Science Foundation. The computational resources were provided by the Computational and Information Systems Laboratory at NCAR

13. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. The National Ecological Observatory Network is a project sponsored by the National Science Foundation and managed under cooperative agreement by NEON Inc.

14. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED. Large science facility fully funded by the National Science Foundation A continental-scale ecological observatory that: Collects and provides data on the drivers/responses of ecological change Serves as an experimental infrastructure/backbone for research and experiments Develops and provides educational resources to engage communities in working with scientific data Project Timeline What is NEON?