More Related Content Similar to Andy Fox DART (20) More from David LeBauer (9) 1. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED.
THE DATA ASSIMILATION RESEARCH
TESTBED (DART) FOR ECOLOGICAL
FORECASTING
Andy Fox1, Tim Hoar2, Kevin Raeder2, Nancy
Collins2, Helen Kershaw2 & Jeff Anderson2
1. National Ecological Observatory Network
2. National Center for Atmospheric Research
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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?
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3. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED.
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• Weather models, e.g.
WRF, COAMPS and MPAS-
A and MPAS-O
• Components of climate
models, e.g.
CAM, POP, WACCM, MITgc
m-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
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4. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED.
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• 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
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• 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.
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• 48 UCAR member
universities
• More than 100 other
institutions
DART is used at
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6. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED.
DART @ NEON
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7. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED.
DART @ NEON
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8. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED.
DART @ NEON
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9. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED.
DART @ NEON
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10. © 2012 National Ecological Observatory Network, Inc. ALL RIGHTS RESERVED.
DART @ NEON
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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
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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
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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?
2004-2011 2012 - ~2017
DATA COLLECTION
~2017 - 2046
SITES BUILT OUTCONCEPT & DESIGN
Editor's Notes A “science facility” is an observatory/organization that enables science by providing a community-wide resource. For example, the a large telescope that provides opportunities for many scientists to propose, collect and use data is also a facility.NEON staff will collect, verify (through QA/QC procedures) and provide data to users through the NEON web portal. All data are available free and to anyone through the web portal.Scientists can propose additional sensors, instruments, data collection, experiments, etc. that leverage NEON infrastructure (i.e., towers, sampling plots, airborne platform, etc.) to NSF to further their research goals.Educational resources include Citizen Science programs, opportunities for undergraduate students to participate in internship or research experiences, a graduate student course, museum projects, online learning modules for students, and seminars/workshops to provide additional professional development/training related to NEON science, data, and educational programs.Timeline Design & Development=community workshops, design groups, development of proposal to NSFConstruction = build observatory infrastructure, data collection protocols, data delivery system, web portal and educational resourcesOperations= collect and provide data, educational resources and infrastructure to users. NEON sites will move into Operations as they are completed during construction. Full Operations will not begin (with data from all sites) until the entire observatory is built, likely in late 2017.
