Davina L. Passeri Christopher G. Smith 20200601 Raster digital data U.S. Geological Survey Data Release doi:10.5066/P9WGJO0S St. Petersburg, FL U.S. Geological Survey https://doi.org/10.5066/P9WGJO0S Using version 52.30 of the ADvanced CIRCulation (ADCIRC) numerical model (Luettich and others, 1992), astronomic tides were simulated at Mobile Bay, Alabama (AL), under scenarios of Holocene geomorphic configurations representing the period of 3500 to 2300 years before present including a breach in the Morgan Peninsula and a land bridge at Pass aux Herons, as described in Smith and others (2020). The two-dimensional ADCIRC model can be applied to coastal and estuarine systems to solve for time-dependent hydrodynamic circulation and transport scenarios. For this study, the ADCIRC unstructured finite element mesh domain spans to the 60th meridian west in the Atlantic Ocean and has higher spatial resolution elements (20 - 100 meters (m)) along the northern Gulf of Mexico coast from Louisiana through the Florida Panhandle. The ADCIRC model setup requires the input of topographic and bathymetric elevations at each mesh node. Model inputs in the form of topography and bathymetry and model outputs in the form of water levels and velocities at each mesh node are provided in this data release. For further information regarding model input generation and visualization of model output, refer to Smith and others (2020). These data were generated for the ADCIRC model to examine the effects of Holocene geomorphic configurations on astronomic tides in Mobile Bay, AL. Initial_Elevations_RS_MP.zip is a dataset consisting of Federal Geographic Data Committee (FGDC) metadata and a Network Common Data Form (NetCDF) file containing the following variables: coordinates of the model grid (longitude and latitude) and the initial bathymetric/topographic (z) model elevation values, in meters, for the reference scenario with the Morgan Peninsula breach. 20200513 publication date Complete As needed -97.8570 -59.9440 45.8370 7.9130 USGS Metadata Identifier USGS:77fc6970-cc82-44de-aff7-fe0702a7d0d2 None U.S. Geological Survey USGS St. Petersburg Coastal and Marine Science Center SPCMSC morphologic change ISO 19115 Topic Category oceans elevation geoscientificInformation USGS Thesaurus digital elevation models tides (oceanic) estuarine processes coastal processes marine geology geomorphology topography bathymetry Geographic Names Information System (GNIS) Content Gulf of Mexico Alabama North America United States Mobile Bay None. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. U.S. Geological Survey, USGS Southeast Region Davina Passeri Research Oceanographer Mailing

600 4th Street South

St. Petersburg FL 33701 US 727-502-8014 727-502-8001 dpasseri@usgs.gov U.S. Geological Survey Microsoft Windows 7 Enterprise; Aquaveo SMS 12.0; MATLAB R2017a Luettich, Jr., R.A., Westerink, J.J., and Scheffner, N.W. November 1992 Washington, DC U.S. Army Corps of Engineers https://apps.dtic.mil/dtic/tr/fulltext/u2/a261608.pdf Smith, C.G., Osterman, L.E., Jones, M.C., and Passeri, D.L. 20200512 Marine Geology Unknown https://doi.org/10.1016/j.margeo.2020.106218 The initial topographic and bathymetric elevations are supplied at each node of the unstructured finite element model mesh and serve as input for the reference scenario with Morgan Peninsula breach. These are the complete initial model elevations for the reference scenario with the Morgan Peninsula breach. This dataset is considered complete for the information presented, as described in the abstract section. Users are advised to read the rest of the metadata record carefully for additional details. This dataset contains the initial model geospatial information and topographic/bathymetric elevations for the reference scenario with the Morgan Peninsula breach. Within the ADCIRC model, the coordinates are provided in decimal degrees using the North American Datum of 1983 (NAD83) geographic coordinate system; elevations are provided in meters. The vertical datum used for the elevation data is the North American Vertical Datum of 1988 (NAVD88) with an estimated resolution of 0.01 m. Passeri, D.L., Hagen, S.C., Plant, N.G., Bilskie, M.V., Medeiros, S.C., and Alizad, K. 20160404 Earth's Future Volume 4, Issue 5, pg. 159-176 https://doi.org/10.1002/2015EF000332 Online digital data 2005 2100 ground condition EF45 inputs Initial model mesh and elevations that were modified to represent the reference scenario with Morgan Peninsula breach. Aquaveo's Surface-water Modeling System (SMS) 12.0 software was used to alter the EF45 inputs of the large-domain hydrodynamic model included in Passeri and others (2016) to represent the reference scenario with the Morgan Peninsula breach, according to the methods described in Smith and others (2020). This dataset, Initial_Elevations_RS_MP.nc provides the initial model elevations for the reference scenario (RS) with the Morgan Peninsula (MP) breach. The initial model elevations were then packaged into a NetCDF file using the functions available in Mathworks MATLAB (R2017a) for inclusion in this data release. 2018 Davina Passeri U.S. Geological Survey Research Oceanographer mailing and physical address

600 4th Street S

St. Petersburg FL 33701 USA (727)-502-8014 (727)-502-8001 dpasseri@usgs.gov Added keywords section with USGS persistent identifier as theme keyword. 20201013 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Gulf of Mexico Raster Grid Cell 4020603 1 1 0.0197905613 0.0226048392 Decimal degrees North American Datum of 1983 Geodectic Reference System 80 6378137.0 298.25722210100002 North American Vertical Datum of 1988 0.0001 meter Attribute values The Climate and Forecast (CF)-compliant metadata in the header of the NetCDF file provides spatial information for projecting the data into a GIS. It also provides information about the conventions used for attributes in the dataset. The entity and attribute information were generated by the individual and/or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information. U.S. Geological Survey, USGS Southeast Region Davina Passeri Research Oceanographer mailing address

600 4th Street South

St. Petersburg FL 33701 US 727-502-8014 727-502-8001 dpasseri@usgs.gov Initial_Elevations_RS_MP.nc This digital publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. NetCDF 4.3.3.1 Initial_Elevations_RS_MP.nc is a NetCDF file that contains the initial model topographic and bathymetric elevations, in meters, and coordinate information, in decimal degrees, for the reference scenario with the Morgan Peninsula breach. The data download file is compressed and must be unzipped using software such as WinZip, 7zip, Peazip or pkUnzip before use. https://coastal.er.usgs.gov/data-release/doi-P9WGJO0S/data/Initial_Elevations_RS_MP.zip None. 20220103 Davina Passeri U.S. Geological Survey, USGS Southeast Region Research Oceanographer mailing address

600 4th Street South

St. Petersburg FL 33701 US 727-502-8014 727-502-8001 dpasseri@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 None None