2003 SAB Summer Upwelling Modeling

Preliminary work

• SST anomaly (MODIS)
• Wind Progressive Vector Diagram (Jack B.)
• River discharge (Jack B.)
• T, S, ρ Savannah transects (Jim, Mimi)
• Tower data time series T, S, wind (Sara)

Data mining to do (Alfredo):

• Observations vs climatology T, S, ρ, N² comparisons
• Different Savannah R/V cruises and months (SAV per month, all)
• T-S diagrams and comparison with Gulf Stream
  

• Upwelling Index 10 year comparison

• Relation to NAO and ENSO
  

• Wind:
  
• NCEP Reanalysis monthly wind anomalies
• Mean and Variance over previous years (Towers + NDBC buoys + CMAN stations)

Wind analysis of SABSOON towers, NDBC buoys and CMAN stations

R2  [SABSOON tower] R8  [SABSOON tower] 41008 [GRAYS REEF - 40 NM Southeast of Savannah, GA] 41004 [EDISTO - 41 NM Southeast of Charleston, SC] 41012 [St. Augustine, FL 40NM ENE of St Augustine, FL] 41001[150 NM East of Cape HATTERAS] 41002 [S HATTERAS - 250 NM East of Charleston, SC] 41009 [CANAVERAL 20 NM East of Cape Canaveral, FL] 41010 [CANAVERAL EAST 120NM East of Cape Canaveral] 41013 [Frying Pan Shoals, NC Buoy] 41025 [Diamond Shoals (Red Buoy)] 44014 [VIRGINIA BEACH 64 NM East of Virginia Beach, VA] FBIS1 [Folly Island, SC] FPSN7 [Frying Pan Shoals, NC] CLKN7 [Cape Lookout, NC] DUCN7 [Duck Pier, NC] CHLV2 [Chesapeake Light, VA] FWYF1 [Fowey Rocks, FL]

• Atmospheric pressure:
• NCEP Reanalysis monthly atmospheric pressure anomalies
• NCEP EDAS 2003 monthly atmospheric pressure and winds (by Brian Blanton)

• Heat Flux:
• Time series of observed heat flux
• NCEP Reanalysis monthly heat flux anomalies
  

Model Studies and Questions

We want to quantify cross-shelf transport (associated with the upwelling) using different transect sections (cross-shelf section, along-isobath section…) and Lagrangian particles releases

Fundy

• Run barotropic Fundy with/without depth dependent eddy viscosity (mid water column reduced mixing)
• Look at Fundy climatological solutions in transect

           Is the upwelling present?

• Force Fundy climatological solution with monthly mean real wind

                      Can wind give us upwelling with climatological mass field?

                      Do we need more realistic mass field?

• Run Fundy with “more realistic” mass field (transect information propagated through the shelf) with real winds

Quoddy

• Barotropic run with real winds
• Reproduce previous Fundy studies with Quoddy in short time scales (length of cruises??) with frozen mass fields
• Try to run Quoddy starting April 03 to look at how the system evolves with real wind and initial mass field. Look at:
• Domain size (just shelf or do we need Gulf Stream?)
• Heat flux (from towers)
• River discharge (??)
• Does the position and intensity of Gulf Stream matter?
• Use HYCOM vs climatology
• HYCOM vs cruise comparison
  
• Preliminary work looking at remote SST+SSH and cable transport data for this period is needed
• Where is the upwelling water coming from?
• Does the inclusion of realistic mass field affect the skill of model runs?
• Comparison with:
• ADCP velocity
• NOS water level