Synthesis & Modeling Project
Marjorie Friedrichs

Eileen Hofmann
Rob Armstrong
Kevin Arrigo
Fei Chai
Jim Christian
Scott Doney
David Glover
Raleigh Hood
John Klinck
Jay McCreary
Dennis McGillicuddy
Ragu Murtugudde
Jerry Wiggert

Regional ecosystem model testbeds. A JGOFS synthesis and modeling project.


PROJECT DESCRIPTION: An important legacy of the U.S. Joint Global Ocean Flux Study (JGOFS) Synthesis and Modeling Project (SMP) will be the formulation of a broad suite of models designed to simulate biogeochemical cycling at the various process study sites.  Although this set of models and modeling studies has already substantially advanced our understanding of these systems, few quantitative intercomparisons of these models have been made.  We propose to conduct these intercomparisons, in order to critically examine which ecosystem structures and formulations are most robust, and to investigate and explore the reasons for their success.  Furthermore, we will critically evaluate the feasibility of developing biogeochemical models that are applicable over a wide range of diverse ecosystems.

The main objectives of the proposed work are:

  1. to add to the mechanistic understanding of how and why euphotic zone production, and the associated export of carbon, vary among diverse oceanographic regions, and
  2. to accelerate the development of mechanistically-based ecosystem models that are capable of simultaneously describing the primary biogeochemical features of multiple oceanographic regimes.

In order to accomplish these goals, and to provide a forum for testing and comparing various ecosystem models, we propose to develop a series of "regional testbeds," based on the high quality and large quantity of observations available from

  1. the Arabian Sea Process Study (ASPS),
  2. the Antarctic Environment and Southern Ocean Process Study (AESOPS),
  3. the Equatorial Pacific Process Study (EqPac),
  4. the second iron enrichment experiment (IronExII),
  5. the Bermuda Atlantic Time-Series Study (BATS), and
  6. the Hawaii Ocean Time-series (HOT)
Websites will be constructed for all testbeds and will include access to the physical fields required to force the models, as well as time-series of biogeochemical data that will be used for either evaluation or optimization/a ssimilation.  These websites will be available as a community resource, and, in this study, will be used to facilitate both intra-site and inter-site model comparisons.

This proposed research will capitalize on work previously accomplished under the JGOFS SMP:  the twelve co-investigators involved in this project will freely provide their regional expertise, model code, forcing fields, and biogeochemical data sets to this project.  To further promote model intercomparisons, this project will involve annual hands-on workshops in which scientists (including but not limited to the co-investigators of this proposal) will work together to quantitatively assess a number of different biogeochemical models and modeling approaches.  Through these intercomparison exercises and carefully designed simulations, the improvement of biogeochemical models will be accelerated, and the scientific community will be significantly closer to having a set of rigorously tested models that can be used for ocean carbon cycle prediction.


DATA: - no data submitted -
PUBLICATIONS: - no publications listed -
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Marjorie Friedrichs
Center for Coastal Physical Oceanography
Old Dominion University
Crittenton Hall
768 West 52nd Street
Norfolk, VA 23529
tel: 804-683-3234
fax: 804-683-5550

Eileen Hofmann
Center for Coastal Phys. Oceanogr.
Crittenton Hall
Old Dominion University
768 West 52nd Street
Norfolk, VA 23529
tel: 757-683-5334
fax: 57-683-5550

Rob Armstrong
Marine Sciences Research Center
State University of New York
Stony Brook, NY 11794-5000
tel: 631-632-3088
fax: 631-632-8820

Kevin Arrigo
Department of Geophysics
Mitchell Building, Room 360
Stanford University
Stanford, CA 94305-2115
tel: 650-723-3599
fax: 650-725-7344

Fei Chai
School of Marine Sciences
5741 Libby Hall
University of Maine
Orono, ME 04469-5741
tel: 207-581-4317
fax: 207-581-4388

Jim Christian
Universities Space Research Association
NASA Goddard Space Flight Ctr
Code 970.2
Greenbelt, MD 20771
tel: 301-286-9911
fax: 301-286-0268

Scott Doney
Oceanography Section
National Center for Atmospheric Research
P.O. Box 3000
Boulder, CO 80307-3000
tel: 303-497-1639
fax: 303-497-1700

David Glover
Marine Chemistry and Geochemistry
Woods Hole Oceanographic Institution
Mail Stop #25
Woods Hole, MA 02543-1541
tel: 508-289-2656
fax: 508-457-2193

Raleigh Hood
Horn Point Environmental Laboratory
2020 Horns Point Rd
P.O. Box 775
Cambridge, MD 21613
tel: 410-221-8434/8497
fax: 410-221-8490

John Klinck
CCPO, Crittenton Hall
Old Dominion University
768 West 52nd Street
Norfolk, VA 23529
tel: 757-683-6005
fax: 757-683-5550

Jay McCreary
University of Hawaii
2525 Correa Rd.
Honolulu, Hawaii 96822
tel: 808-956-2216
fax: 808-956-9425

Dennis McGillicuddy
Dept of Applied Ocean Physics and
Woods Hole Oceanographic Institution
98 Water Street, MS#12
Woods Hole, MA 02543
tel: 508-289-2683
fax: 508-457-2194

Ragu Murtugudde
Code 970/Bldg 33
Greenbelt, MD 20771
tel: 301-614-5667
fax: 301-614-5666

Jerry Wiggert
Earth System Science Interdisciplinary Center
University of Maryland
College Park, MD 20742-2465
tel: 301-405-4971
fax: 301-405-8468