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St. Petersburg Coastal and Marine Science Center images.

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Shoreline erosion exposes a Native American shell midden below a coastal flatwood forest
Estuarine shoreline erosion exposes a Native American shell midden
Estuarine shoreline erosion exposes a Native American shell midden
Estuarine shoreline erosion exposes a Native American shell midden

Estuarine shoreline erosion exposes a Native American shell midden beneath the surface of a coastal flatwood forest. Shell middens are the discarded shells and materials from generations of Indigenous people who lived along U.S. coastlines.

Estuarine shoreline erosion exposes a Native American shell midden beneath the surface of a coastal flatwood forest. Shell middens are the discarded shells and materials from generations of Indigenous people who lived along U.S. coastlines.

Two shards of Native American pottery found at an eroding shell midden site along the shoreline of Apalachicola Bay
Native American pottery shards
Native American pottery shards
Native American pottery shards

Two shards of Native American pottery found at shell midden site that is located on an actively eroding shoreline of Apalachicola Bay. The shards show distinctive markings created by paleo Indians thousands of years ago.

Two shards of Native American pottery found at shell midden site that is located on an actively eroding shoreline of Apalachicola Bay. The shards show distinctive markings created by paleo Indians thousands of years ago.

The sinuous backbarrier coastline of St. George Island showing the sandy beach, grasses, and pine trees
Backbarrier coastline of St. George Island
Backbarrier coastline of St. George Island
Backbarrier coastline of St. George Island

The estuarine (backbarrier) shoreline of barrier islands in Gulf of America are complex, ecologically diverse habitats that are under threat due to human development, sea level rise, and storms.

The estuarine (backbarrier) shoreline of barrier islands in Gulf of America are complex, ecologically diverse habitats that are under threat due to human development, sea level rise, and storms.

Marsh shoreline with a rock breakwater in the nearshore
Rock breakwaters are used to protect marsh shoreline from erosion
Rock breakwaters are used to protect marsh shoreline from erosion
Rock breakwaters are used to protect marsh shoreline from erosion

The estuarine shoreline of barrier islands along the Gulf of America are vulnerable to shoreline erosion. Structures, such as this rock breakwater, can be used to protect the shoreline from erosional waves.

Native American shell midden is exposed to erosion from sea level rise and storms
Native American shell midden is exposed to erosion from sea level rise and storms
Native American shell midden is exposed to erosion from sea level rise and storms
Native American shell midden is exposed to erosion from sea level rise and storms

Florida archaeologist, Nicole Grinnan, talks about the vulnerability of Native American shell middens to coastal erosion from sea level rise and storms along the Apalachicola Bay.

An image of Texas' coastline with red stripes indicating where collision, overwash, and inundation may occur.
U.S. Geological Survey projects Beryl’s potential impact when it strikes Texas’ coast
U.S. Geological Survey projects Beryl’s potential impact when it strikes Texas’ coast
U.S. Geological Survey projects Beryl’s potential impact when it strikes Texas’ coast

A screenshot of the U.S. Geological Survey's costal change hazards portal, indicates the forecast of Tropical Storm Beryl's impact on the coast of Texas. The three red lines indicate the collision, wave and water sand dune overwash, and dune inundation. 

A researcher drives a personal watercraft carrying scientific equipment on a calm sunny day with an island in the background
In transit to survey the shallows of Wallops Island, Virginia
In transit to survey the shallows of Wallops Island, Virginia
In transit to survey the shallows of Wallops Island, Virginia

Sabrina Levinson, a USGS intern on the Coastal Sediment Availability and Flux Project (St. Petersburg Coastal and Marine Science Center), pilots a survey waverunner to the shallows of Wallops Island, Virginia.

A group photo taken outside in front of a statue of hand with birds flying out of it and brick building
CCCoP Steering Committee
CCCoP Steering Committee
CCCoP Steering Committee

Coastal Coupling Community of Practice Executive Committee and other subject matter experts (partial group) in front of a National Oceanic and Atmospheric Administration building and “The Hand.” From left to right: Rebecca Atkins, John Warner, Cristina Urizar, Tracy Fanara, Courtney Barry, Trey Flowers, Saeed Moghimi, David Welch, Lucila Houttuijn Bloemendaal, Chris

Coastal Coupling Community of Practice Executive Committee and other subject matter experts (partial group) in front of a National Oceanic and Atmospheric Administration building and “The Hand.” From left to right: Rebecca Atkins, John Warner, Cristina Urizar, Tracy Fanara, Courtney Barry, Trey Flowers, Saeed Moghimi, David Welch, Lucila Houttuijn Bloemendaal, Chris

Map of coral core sites
Map of coral core sites
Map of coral core sites
Map of coral core sites

The newly developed USGS Coral Core Archive, housed at the Santa Cruz and St. Petersburg Coastal and Marine Science Centers, contains approximately 500 coral reef cores from U.S. jurisdictions worldwide.

The newly developed USGS Coral Core Archive, housed at the Santa Cruz and St. Petersburg Coastal and Marine Science Centers, contains approximately 500 coral reef cores from U.S. jurisdictions worldwide.

Photo of coral carbonate standards
Photo of coral carbonate standards
Photo of coral carbonate standards
Photo of coral carbonate standards

Photo of coral carbonate standards, arranged from high to low density. To convert CT values to real-world densities and quantify the uncertainty in reconstructed density as a result of offsets, a set of carbonate standards are included in every CT scan that represent a range of coral species with different densities.

Photo of coral carbonate standards, arranged from high to low density. To convert CT values to real-world densities and quantify the uncertainty in reconstructed density as a result of offsets, a set of carbonate standards are included in every CT scan that represent a range of coral species with different densities.

Coral core sample in aluminum tube for scanning
Coral core sample in aluminum tube for scanning
Coral core sample in aluminum tube for scanning
Coral core sample in aluminum tube for scanning

Coral sample in aluminum tube being prepared for scanning. The use of a secondary aluminum filter reduces beam hardening artifacts (rings) while also avoiding attenuating the x-ray beam.

Graph showing relationship between CT intensities and measured density of the coral standards used to calibrate data
Graph showing relationship between CT intensities and measured density of the coral standards used to calibrate data
Graph showing relationship between CT intensities and measured density of the coral standards used to calibrate data
Graph showing relationship between CT intensities and measured density of the coral standards used to calibrate data

Example of the relationship between CT intensities and measured density of the coral standards used to calibrate data. The measured density of the coral standards are compared to the mean intensities of each standard. Linear regressions calculated from the standard values are then used to calibrate data.

CT scan of Orbicella coral sample with no packing material
CT scan of Orbicella coral sample with no packing material
CT scan of Orbicella coral sample with no packing material
CT scan of Orbicella coral sample with no packing material

Orbicella spp. coral sample with no packing material. Center of image is darker than edges. Transect across image shows intensity values lower in the center creating a cupping effect.

infographic showing transects signaling coastal change, onshore and offshore baselines
DSAS
DSAS
DSAS

DSAS generates transects that are cast perpendicular to the reference baseline to intersect shorelines at a user-specified spacing alongshore. Please note that the figure above illustrates the placement of both onshore and offshore baselines as examples. In DSAS v6.0 all baselines in a file must be placed either offshore or onshore, not combined.

DSAS generates transects that are cast perpendicular to the reference baseline to intersect shorelines at a user-specified spacing alongshore. Please note that the figure above illustrates the placement of both onshore and offshore baselines as examples. In DSAS v6.0 all baselines in a file must be placed either offshore or onshore, not combined.

DSAS v6.0 infographic
DSAS v6.0 Infographic
DSAS v6.0 Infographic
DSAS v6.0 Infographic

The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS.  Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.

The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS.  Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.

A woman stands in front of a table covered with information products, with 2 large vertical posters behind her.
Donya Frank-Gilchrist (SPCMSC) manages the USGS booth at the 2024 SCDRP annual meeting
Donya Frank-Gilchrist (SPCMSC) manages the USGS booth at the 2024 SCDRP annual meeting
Donya Frank-Gilchrist (SPCMSC) manages the USGS booth at the 2024 SCDRP annual meeting

Donya Frank-Gilchrist (SPCMSC) manages the USGS booth at the recent SCDRP annual meeting to share USGS data and tools with community resilience partners and stakeholders.

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