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Primary Objectives

Physical Oceanography of Georges Bank and Its Impact on Biology Update - November 2003 Grant Period: 7/02-7/05. Bob Beardsley, Ken Brink, Dick Limeburner, Jim Churchill, Jim Ledwell, Jim Irish, Mike Caruso, Jim Lerczak (WHOI) Charles Flagg (BNL) Changsheng Chen, Jim Bisagni (UMD)

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Primary Objectives

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  1. Physical Oceanography of Georges Bank and Its Impact on BiologyUpdate - November 2003 Grant Period: 7/02-7/05 Bob Beardsley, Ken Brink, Dick Limeburner, Jim Churchill, Jim Ledwell, Jim Irish, Mike Caruso, Jim Lerczak (WHOI) Charles Flagg (BNL) Changsheng Chen, Jim Bisagni (UMD) Ron Schlitz (NMFS)

  2. Primary Objectives • To understand the physical dynamics and interactions of several specific processes (e.g., the seasonal evolution of stratification on the Bank, the crucial flow field over the Northeast Peak, and cross-frontal exchange within the tidal mixing and northern flank fronts) that are thought to play critical roles in zooplankton and fish recruitment. • To combine these observationally based process synthesis studies into model-based studies to provide our best descriptions of the Bank's physical environment and its variability on time scales from minutes to monthly to seasonal for the GLOBEC field years. • To provide other Phase IV investigators with as complete a description and understanding of the basic physical processes affecting their observations as possible.

  3. Year 1 Activities • JGR-Oceans Special Section • Environmental Chronology • 1999 Stratification and Flow Synthesis • Process Studies and Interannual Variability on Bank Edges • 1999 Tidal Mixing Front over Southern Flank Synthesis • FVCOM Development, Application, and Evaluation

  4. U.S. GLOBEC: Physical processes on Georges BankJGR-Oceans Special Section GLOBEC (Georges Bank), Nov. 2003 1995 Stratification Study (6) • Surface wind stress, heat and moisture fluxes at ST1 (Beardsley) • Temperature and salt balances & salt balances around ST1 (Lentz) • Bottom stress and bedform evolution at ST1 (Werner) • Tidal boundary layer structure and evolution at ST1 (Werner) • Slope water intrusions and impact (Churchill) 1999 Frontal Studies (2) • Northern flank tidal & subtidal variability (Dale) • Northern flank cross-frontal fluxes and mixing (Ullman)

  5. 1995-1999 Bank/Seasonal Scale (2) • Drifter-derived near-surface current field (Brink) • Shipboard ADCP-derived depth-average current field (Flagg) Seasonal/interannual Scale (2) • Halifax section transport and water property variability (Loder) • Nitrate supply and new production on GB (Bisagni) Model Process Studies (3) • Influence of diurnal heating on GB stratification and flow (Chen) • Wind-forced cross-front exchange on GB in early summer (Chen) • Temperature and flow influences on Calanus in Gulf of St. Lawrence and Scotian Shelf using a 3-D circulation/biological model (Zakardjian)

  6. 9,10, 16 3 13,14 1,2,15 4,5,6,7,8,11 12

  7. Environmental Chronology • Processing of 1999 Eastern Flank Frontal Exchange moored array and drifter data completed (Limeburner) • Reprocessing of 1994-1999 Long-Term moored array data completed (Irish, Caruso, Limeburner, Beardsley) (Tech Report to be finished soon) --P-- • Analysis of LT moored data started (Brink) • Physical chronology at Southern Flank site started (Irish, ..) --P--

  8. GLOBEC moored arrays

  9. 1999 Stratification and Flow Synthesis • Characterization of subtidal oscillatory flow (Limeburner) --P-- • Start description of eastern flank physical variability based on LT and FE moored data (Beardsley, Limeburner,Flagg) Process Studies and Interannual Variability on Bank Edges • Seasonal and Interannual Variability of the Shelf-Slope Front Between 75° and 50° W (Bisagni)

  10. GSNW SSF

  11. 1999 Tidal Mixing Front over Southern Flank • Analysis of TMF ADCP array (Lerczak, Schlitz) --T-- • Start analysis of 1999 WHOI tracer release experiment (Churchill,Ledwell) FVCOM Development, Application, Evaluation • Develop GoM MM5 to produce surface forcing for 1995 and 1999 (Chen, Beardsley) --T-- • Compare FVCOM with other coastal models on test problems (Chen, Beardsley) • FVCOM simulation of 1995 and 1999 stratification seasons (Chen) --T-- • FVCOM simulation for 1999 dye release studiesstarted (Chen)

  12. Year 2 Initial Activities (Draft) • Complete LT moored array analysis, description of 1999 Eastern Flank variability (Brink, Limeburner, Flagg, Beardsley) • Complete PO chronology at southern flank site (Irish, Caruso) • Complete analysis of 1999 TMF ADCP array (Lerczak, Schlitz) • Start analysis of 1999 tracer release data (Churchill, Ledwell) • Evaluate FVCOM 1995 and 1999 stratification season simulations (Chen, Beardsley, ..) • Evaluate FVCOM 1999 TMF simulations (Chen,….) • Start northern flank jet instability study with FVCOM (Brink, Chen) 8. Others?????

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