Join SECOORA for a webinar that analyzes the West Florida Continental Shelf's response to Hurricane Irma using a combination of in situ observations and numerical circulation models.
West Florida Shelf and Tampa Bay Responses to Hurricane Irma: What Happened and Why
Presenter: Dr. Bob Weisberg, University of South Florida College of Marine Science
Date: February 13, 12 PM ET
Hurricane Irma impacted the west Florida continental shelf (WFS) as it transited the State of Florida from September 10-12, 2017, first making landfall at Cudjoe Key and then again at Naples, as a Category 2 hurricane. The WFS response to Irma is analyzed using a combination of in situ observations and numerical circulation models. The observations include water column velocity, sea surface temperature, winds and sea level. The models are: 1) the West Florida Coastal Ocean Model (WFCOM) that downscales from the deep Gulf of Mexico, across the shelf and into the estuaries by nesting the unstructured grid FVCOM in the Gulf of Mexico HYCOM and 2) the Tampa Bay Coastal Ocean Model (TBCOM) that provides much higher resolution for the Tampa Bay vicinity (Tampa Bay, Sarasota Bay, the Intracoastal Waterway and all of the inlets connecting these with the Gulf of Mexico) by nesting FVCOM in WFCOM.
Both the observations and the model simulations revealed strong upwelling and vertical mixing followed by a downwelling as the storm passed by. This was accompanied by a rapid drop in sea surface temperature by about 4 degrees C and large decreases in sea level with negative surges causing drying in the Florida Bay, Charlotte Harbor, Tampa Bay estuaries and the Big Bend region. The transport and exchange of water between the shelf and the estuaries and between the shelf and the Florida Keys reef track during the hurricane have important ecosystem and sediment transport implications, including an inlet breach that occurred at the Pinellas Co. Shell Key preserve.