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Research Spending & Results

Award Detail

Awardee:WOODS HOLE OCEANOGRAPHIC INSTITUTION
Doing Business As Name:Woods Hole Oceanographic Institution
PD/PI:
  • Rubao Ji
  • (508) 289-2986
  • rji@whoi.edu
Co-PD(s)/co-PI(s):
  • Cabell S Davis
  • Robert C Beardsley
Award Date:09/14/2007
Estimated Total Award Amount: $ 360,324
Funds Obligated to Date: $ 360,324
  • FY 2007=$360,324
Start Date:10/01/2007
End Date:09/30/2013
Transaction Type:Grant
Agency:NSF
Awarding Agency Code:4900
Funding Agency Code:4900
CFDA Number:47.050
Primary Program Source:490100 NSF RESEARCH & RELATED ACTIVIT
Award Title or Description:Collaborative Research: Interannual Variability of Coastal Phytoplankton Blooms in the Gulf of Maine and Their Relationships to Local and Remote Forcings
Federal Award ID Number:0727033
DUNS ID:001766682
Parent DUNS ID:001766682
Program:BIOLOGICAL OCEANOGRAPHY

Awardee Location

Street:183 OYSTER POND ROAD
City:WOODS HOLE
State:MA
ZIP:02543-1041
County:Woods Hole
Country:US
Awardee Cong. District:09

Primary Place of Performance

Organization Name:Woods Hole Oceanographic Institution
Street:183 OYSTER POND ROAD
City:WOODS HOLE
State:MA
ZIP:02543-1041
County:Woods Hole
Country:US
Cong. District:09

Abstract at Time of Award

The aim of this project is to explore the interaction of remote climate based forcing with local forcing to impact phytoplankton blooms in coastal and shelf regions with a coupled biological-physical model. Phytoplankton bloom dynamics are a classic example of biological-physical interactions in the ocean (Gran and Braarud, 1935; Sverdrup, 1953). Yet it is still a challenge to identify the dominant processes controlling the interannual variability of phytoplankton blooms in coastal and shelf seas where multiple-scale biological and physical processes interact. The unstructured-grid, finite-volume, coastal ocean model (FVCOM, built within the GLOBEC Georges Bank Program) bridges the multi-scale physical processes of the Gulf of Maine and includes both local and remote forcing. Twelve years of prognostic simulation and assimilation experiment products, with careful comparison/validation with field measurements, provide a unique background and tools with which to explore the interannual variability of ecosystem dynamics in the Gulf of Maine. This project will examine relationships between the dynamics of spring and fall phytoplankton blooms in the Gulf and local and remote forcing. A specific focus is the variability Scotian Shelf Water and Slope Water inflows. A series of numerical experiments will be conducted to test long-standing and recently-proposed hypotheses, including the impact of the North Atlantic Oscillation as it influences Warm Slope Water versus Labrador Slope Water dynamics, which in turn affect nutrient fluxes to the Gulf of Maine and vertical fluxes between surface and deep waters. The influence of surface water freshening (related to Scotian Shelf Water inflow, in turn believed to be affected by global warming) on the vertical density structure of the water column, winter convection, and consequently, the timing/magnitude of blooms, will also be addressed. The process-oriented coupled biological and physical model experiments will focus on the date-rich period 1998-2001 when pronounced large-scale forcing conditions occurred. Providing new insights into the influence of large-scale forcing on the dynamics and productivity of coastal ocean ecosystems will be a significant advance in our understanding of phytoplankton blooms dynamics, which has been traditionally focused on local forcing and seasonal changes. The project will provide a web-based open archive of the 1995-2006 coupled model hourly physical and biological output, and produce a tested coupled biological-physical model system available for other ongoing (e.g. ECOHAB) and future ecosystem studies in the Gulf of Maine and other coastal oceans. The web-based ocean forecast model system being developed by UMASSD-WHOI will benefit directly from this project by helping to optimize the design of ocean observatories and help shape the future of interdependent model-observing systems. Broader Impacts: Results will be broadly disseminated to the general research, undergraduate and graduate education communities, K-12 institutions, and to the interested public through web-based servers using existing infrastructure at the investigators' institutions. Web-based users will be able to access project description, scientific results, model input and output archives, animations of various physical and biological fields, etc. Collaboration with the New Bedford SEALAB Marine Science Education Center and the WHOI/UMASS COSEE program will foster communication with K-12 teachers and students and the public both nationally and internationally.

Publications Produced as a Result of this Research

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Ji, R., C. Stegert, C. Davis "Sensitivity of copepod populations to bottom-up and top-down forcing: a modeling study in the Gulf of Maine region." Journal of Plankton Research, v., 2012, p.. doi:10.1093/plankt/fbs070 

Song, H., R. Ji, C. Stock, Z. Wang "Phenology of phytoplankton blooms in the Nova Scotian Shelf-Gulf of Maine region: remote sensing and modeling analysis" Journal of Plankton Research, v., 2010, p.. doi:doi:10.1093/plankt/fbq086 

Ji, RB; Davis, CS; Chen, CS; Beardsley, RC "Life history traits and spatiotemporal distributional patterns of copepod populations in the Gulf of Maine-Georges Bank region" MARINE ECOLOGY-PROGRESS SERIES, v.384, 2009, p.187. doi:10.3354/meps0803  View record at Web of Science

Lin, P., R. Ji, C. Davis, D. McGillicuddy, 2010 "Optimizing plankton survey strategies using Observing System Simulation Experiments" Journal of Marine Systems, v.82, 2010, p.820.

Daewel, U., S. S. Hjøllo, M. Huret, R. Ji, M. Maar, S. Niiranen, M. Travers-Trolet, M. A. Peck, and K. E. van de Wolfshaar "Predation control of zooplankton dynamics: a review of observations and models" ICES J. Mar. Sci., v., 2013, p.doi:10.10.

Song, HJ; Ji, RB; Stock, C; Wang, ZL "Phenology of phytoplankton blooms in the Nova Scotian Shelf-Gulf of Maine region: remote sensing and modeling analysis" JOURNAL OF PLANKTON RESEARCH, v.32, 2010, p.1485. doi:10.1093/plankt/fbq08  View record at Web of Science

Lai, ZG; Chen, CS; Cowles, GW; Beardsley, RC "A nonhydrostatic version of FVCOM: 1. Validation experiments" JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, v.115, 2010, p.. doi:10.1029/2009JC00552  View record at Web of Science

Song, HJ; Ji, RB; Stock, C; Kearney, K; Wang, ZL "Interannual variability in phytoplankton blooms and plankton productivity over the Nova Scotian Shelf and in the Gulf of Maine" MARINE ECOLOGY-PROGRESS SERIES, v.426, 2011, p.105. doi:10.3354/meps0900  View record at Web of Science

Townsend, DW; Rebuck, ND; Thomas, MA; Karp-Boss, L; Gettings, RM "A changing nutrient regime in the Gulf of Maine" CONTINENTAL SHELF RESEARCH, v.30, 2010, p.820. doi:10.1016/j.csr.2010.01.01  View record at Web of Science

Chen, CS; Xu, QC; Houghton, R; Beardsley, RC "A model-dye comparison experiment in the tidal mixing front zone on the southern flank of Georges Bank" JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, v.113, 2008, p.. doi:10.1029/2007JC00410  View record at Web of Science

Hu, S; Townsend, DW; Chen, C; Cowles, G; Beardsley, RC; Ji, R; Houghton, RW "Tidal pumping and nutrient fluxes on Georges Bank: A process-oriented modeling study" JOURNAL OF MARINE SYSTEMS, v.74, 2008, p.528. doi:10.1016/j.jmarsys.2008.04.00  View record at Web of Science

Ji, R., M. Edwards, D.L. Mackas, J. Runge, A.C. Thomas "Marine plankton phenology and life history in a changing climate:Current research and future directions" Journal of Plankton Research, v., 2010, p.. doi:10.1093/plankt/fbq062 

Ji, RB; Davis, C; Chen, CS; Beardsley, R "Influence of local and external processes on the annual nitrogen cycle and primary productivity on Georges Bank: A 3-D biological-physical modeling study" JOURNAL OF MARINE SYSTEMS, v.73, 2008, p.31. doi:10.1016/j.jmarsys.2007.08.00  View record at Web of Science

Ji, RB; Davis, CS; Chen, CS; Townsend, DW; Mountain, DG; Beardsley, RC "Modeling the influence of low-salinity water inflow on winter-spring phytoplankton dynamics in the Nova Scotian Shelf-Gulf of Maine region" JOURNAL OF PLANKTON RESEARCH, v.30, 2008, p.1399. doi:10.1093/plankt/fbn09  View record at Web of Science

Lai, ZG; Chen, CS; Beardsley, RC; Rothschild, B; Tian, RC "Impact of high-frequency nonlinear internal waves on plankton dynamics in Massachusetts Bay" JOURNAL OF MARINE RESEARCH, v.68, 2010, p.259. View record at Web of Science

Ji, R. "Calanus finmarchicus diapause initiation: new view from traditional life history based model." Marine Ecology Progress Series, v.440, 2011, p.105.

Ji, R., C. Stegert, C. Davis "Sensitivity of copepod populations to bottom-up and top-down forcing: a modeling study in the Gulf of Maine region" Journal of Plankton Research, v.35, 2012, p.66.

Ji, RB; Davis, CS; Chen, CS; Townsend, DW; Mountain, DG; Beardsley, RC "Influence of ocean freshening on shelf phytoplankton dynamics" GEOPHYSICAL RESEARCH LETTERS, v.34, 2007, p.. doi:10.1029/2007GL03201  View record at Web of Science

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