Archive of Chirp Subbottom Profile Data Collected in 2022 From Seven Mile Island, New Jersey

As part of the Coastal Sediment Availability and Flux project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted a nearshore geophysical survey to map the shoreface and inner shelf, as well as characterizing stratigraphy near Seven Mile Island, New Jersey (NJ) in April and May 2022. The objective of the project is to improve the understanding of barrier island geomorphic evolution and the sediment fluxes that drive that evolution over geologic and historic time scales. Additionally, the purpose of this study was to support an assessment of barrier island resilience after Hurricane Sandy (U.S. landfall was October 29, 2012). Collecting geophysical data can help researchers to identify relationships between the geologic history of the island, its present-day morphology, and sediment distribution. High-resolution geophysical data collected along this barrier island can further the analyses and geomorphological interpretations of this and other coastal systems, improving researchers understanding of coastal response and evolution.

This data release serves as an archive of subbottom profile and navigation data collected April 29-May 2, 2022, offshore of Seven Mile Island, NJ, during USGS Field Activity Number 2022-309-FA. Data products, including chirp subbottom profile data and images, survey trackline maps, location data with formal Federal Geographic Data Committee (FGDC) metadata, and field logs are provided. Coastal bathymetry and sound velocity data were also collected during this geophysical survey and are provided in another data release (Lyons and others, 2023).

Lyons, E.O., DeWitt, N.T., Stalk, C.A., Reynolds, B.J., Farmer, A.S., Bernier, J.C., Galbraith, B.A., Wei, E.A., and Miselis, J.L., 2023, Coastal Single-beam bathymetry data collected in 2022 off Seven Mile Island, New Jersey: U.S. Geological Survey data release, https://doi.org/10.5066/P9P07T3W.