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Daniel Ciarletta, Ph.D.

I investigate the evolution of barrier island morphology to learn about how changes in sediment availability, sea-level rise, and other environmental factors impact coastal resiliency and vulnerability. To accomplish this, I combine field approaches with numerical modeling to quantify geomorphological change through time.

I received my B.S. in Oceanography from the Florida Institute of Technology, and an M.S. in Geoscience plus a Ph.D. in Environmental Science and Management from Montclair State University. I received a Mendenhall Postdoctoral Fellowship from the USGS and started work at the Saint Petersburg Coastal and Marine Science Center in 2019, where I currently research the effects of sediment availability on barrier island evolution.

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An island with sections of short grasses has been covered by a large sand fan that was washed landward by waves.

Storm-Related Barrier Island Morphological Evolution

Storms quickly and dramatically alter barrier island environments by changing adjacent seafloor morphology, eroding beaches, scarping or leveling dunes, and sometimes creating new inlets. Measuring the magnitude of barrier island sediment movement during and after storms allows us to track rates of beach recovery, dune growth, and inlet-related alterations to barrier island sediment supply.
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
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Storm-Related Barrier Island Morphological Evolution

Storms quickly and dramatically alter barrier island environments by changing adjacent seafloor morphology, eroding beaches, scarping or leveling dunes, and sometimes creating new inlets. Measuring the magnitude of barrier island sediment movement during and after storms allows us to track rates of beach recovery, dune growth, and inlet-related alterations to barrier island sediment supply.
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A long barrier island, mainly sandy with some vegetation, has a sediment berm placed along the shoreface.

Barrier Island Sensitivity to Changes in Sediment Supply

Observations and models show that maintaining barrier islands requires a balance between sea-level rise and sediment supply. However, most estimates of sediment supply are not based on modern conditions, which could result in less accurate predictions of sediment fluxes. We explore how natural and human alterations impact modern sediment fluxes, or changes, on barrier islands – research that has...
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
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Barrier Island Sensitivity to Changes in Sediment Supply

Observations and models show that maintaining barrier islands requires a balance between sea-level rise and sediment supply. However, most estimates of sediment supply are not based on modern conditions, which could result in less accurate predictions of sediment fluxes. We explore how natural and human alterations impact modern sediment fluxes, or changes, on barrier islands – research that has...
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A boat operated by USGS staff tows an instrument that collects geophysical data in in the shallow shoreface near the beach

Shoreface Morphology and Geology

Exchanges of sediment between the shoreface and barrier islands allow barrier islands to adjust to changes in water level, such as those associated with storms or sea-level rise. Characterizing shoreface morphology and geology allows us to explore how past and present processes have impacted modern barrier island sediment transport and what that means for future barrier island evolution.
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
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Shoreface Morphology and Geology

Exchanges of sediment between the shoreface and barrier islands allow barrier islands to adjust to changes in water level, such as those associated with storms or sea-level rise. Characterizing shoreface morphology and geology allows us to explore how past and present processes have impacted modern barrier island sediment transport and what that means for future barrier island evolution.
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Sandy barrier island with dunes near a sandy beach on one side, low vegetation in the middle, and a bay of water on the other.

Modeling Barrier Island Evolution, Shoreface Morphology, and Overwash

Barrier island field observations provide information about past and current environmental conditions and changes over time; however, they can’t tell us about the future. Models can predict possible future behaviors but are only as good as their input data. By integrating both observations and models, we can extend observations and arrive at more realistic predictions of barrier island behavior...
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
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Modeling Barrier Island Evolution, Shoreface Morphology, and Overwash

Barrier island field observations provide information about past and current environmental conditions and changes over time; however, they can’t tell us about the future. Models can predict possible future behaviors but are only as good as their input data. By integrating both observations and models, we can extend observations and arrive at more realistic predictions of barrier island behavior...
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Scientists operate scientific sediment coring equipment with a tall metal barrel and tripod on a sandy beach near the water.

Coastal Sediment Availability and Flux (CSAF) Capabilities

As part of the Coastal Sediment Availability and Flux project, we use innovative technology and integrate a variety of techniques to characterize barrier island environments, reconstruct their past history, and predict their future vulnerability.
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
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Coastal Sediment Availability and Flux (CSAF) Capabilities

As part of the Coastal Sediment Availability and Flux project, we use innovative technology and integrate a variety of techniques to characterize barrier island environments, reconstruct their past history, and predict their future vulnerability.
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Photo of Fire Island showing back barrier, dunes, beach, and nearshore environments

Coastal Sediment Availability and Flux (CSAF)

Sediments are the foundation of coastal systems, including barrier islands. Their behavior is driven by not only sediment availability, but also sediment exchanges between barrier island environments. We collect geophysical, remote sensing, and sediment data to estimate these parameters, which are integrated with models to improve prediction of coastal response to extreme storms and sea-level rise...
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center, Gulf of Mexico
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Coastal Sediment Availability and Flux (CSAF)

Sediments are the foundation of coastal systems, including barrier islands. Their behavior is driven by not only sediment availability, but also sediment exchanges between barrier island environments. We collect geophysical, remote sensing, and sediment data to estimate these parameters, which are integrated with models to improve prediction of coastal response to extreme storms and sea-level rise...
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Ground Penetrating Radar and Global Positioning System Data collected in 2021 from Pinellas County Barrier Islands, Florida

In 2021, scientists from the USGS St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted ground penetrating radar (GPR) and sediment sampling surveys on barrier islands located along the central Florida (FL) Gulf Coast (CFGC), Pinellas County, FL. This study investigated the past evolution of the CFGC from field sites at Anclote Key, Caladesi and Honeymoon Islands, and Fort DeSoto to
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St. Petersburg Coastal and Marine Science Center

Sediment Data From Vibracores and Sand Augers Collected in 2021 and 2022 From Fire Island, New York

In 2021 and 2022, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) and the USGS New York Water Science Center (NYWSC), on behalf of SPCMSC, conducted sediment sampling and ground penetrating radar (GPR) surveys at Point O' Woods and Ho-Hum Beach (NYWSC, 2021) and Watch Hill, Long Cove, and Smith Point (SPCMSC, 2022), Fire Island, New York.
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Ground Penetrating Radar and Global Positioning System Data Collected in 2021 From Fire Island, New York

In 2016, the U.S. Geological Survey (USGS) conducted ground penetrating radar (GPR) surveys and sediment sampling at Fire Island, New York to characterize and quantify spatial variability in the subaerial geology (Forde and others, 2018). These surveys, in combination with historical data, allowed for a preliminary reconstruction of the barriers long-term evolution. In 2021, scientists from the US
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
a usgs scientist helps two children hold a vibracore at an outdoor public festival
Dan Ciarletta Teaches Students About Sediment Cores at the 2023 St. Petersburg Science Festival
Dan Ciarletta Teaches Students About Sediment Cores at the 2023 St. Petersburg Science Festival
a usgs scientist helps two children hold a vibracore at an outdoor public festival

Dan Ciarletta Teaches Students About Sediment Cores at the 2023 St. Petersburg Science Festival

Dan Ciarletta Teaches Students About Sediment Cores at the 2023 St. Petersburg Science Festival

Dan Ciarletta teaches some students about sediment cores at the 2023 St. Petersburg Science Festival. For more than 10 years, the St. Petersburg Science Festival has celebrated STEAM (science, technology, engineering, art, and mathematics) activities with elementary school children and the public over a two-day event.

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St. Petersburg Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center
a usgs scientist helps two children hold a vibracore at an outdoor public festival

Dan Ciarletta Teaches Students About Sediment Cores at the 2023 St. Petersburg Science Festival

Dan Ciarletta Teaches Students About Sediment Cores at the 2023 St. Petersburg Science Festival

Dan Ciarletta teaches some students about sediment cores at the 2023 St. Petersburg Science Festival. For more than 10 years, the St. Petersburg Science Festival has celebrated STEAM (science, technology, engineering, art, and mathematics) activities with elementary school children and the public over a two-day event.

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St. Petersburg Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center
View of a beach with high-rise buildings in the distance and a lifeguard station on the right.
View of Sand Key, Florida
View of Sand Key, Florida
View of a beach with high-rise buildings in the distance and a lifeguard station on the right.

View of Sand Key, Florida

View of Sand Key, Florida

Photo taken at Sand Key, Florida, overlooking the Gulf of Mexico coast. A high resolution digital video camera is installed atop Dan's Island Condo, one of the condos seen in the distance. 

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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
View of a beach with high-rise buildings in the distance and a lifeguard station on the right.

View of Sand Key, Florida

View of Sand Key, Florida

Photo taken at Sand Key, Florida, overlooking the Gulf of Mexico coast. A high resolution digital video camera is installed atop Dan's Island Condo, one of the condos seen in the distance. 

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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Text, "Secrets of the Sediment on Barrier Islands" St. Pete Coastal/Marine Science Center" over photo of hand holding sand Secrets of the Sediment on Barrier Islands (AD)
Secrets of the Sediment on Barrier Islands (AD)
Text, "Secrets of the Sediment on Barrier Islands" St. Pete Coastal/Marine Science Center" over photo of hand holding sand

Secrets of the Sediment on Barrier Islands (AD)

Secrets of the Sediment on Barrier Islands (AD)

Join the USGS St. Petersburg Coastal and Marine Science Center as they uncover the secrets of the sediment on barrier islands in Pinellas County, Florida. This video was originally created for use at the 2021 virtual St. Petersburg Science Festival.

View non-AD version.

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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Text, "Secrets of the Sediment on Barrier Islands" St. Pete Coastal/Marine Science Center" over photo of hand holding sand

Secrets of the Sediment on Barrier Islands (AD)

Secrets of the Sediment on Barrier Islands (AD)

Join the USGS St. Petersburg Coastal and Marine Science Center as they uncover the secrets of the sediment on barrier islands in Pinellas County, Florida. This video was originally created for use at the 2021 virtual St. Petersburg Science Festival.

View non-AD version.

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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Text, "Secrets of the Sediment on Barrier Islands" St. Pete Coastal/Marine Science Center" over photo of hand holding sand Secrets of the Sediment on Barrier Islands
Secrets of the Sediment on Barrier Islands
Text, "Secrets of the Sediment on Barrier Islands" St. Pete Coastal/Marine Science Center" over photo of hand holding sand

Secrets of the Sediment on Barrier Islands

Secrets of the Sediment on Barrier Islands

Join the USGS St. Petersburg Coastal and Marine Science Center as they uncover the secrets of the sediment on barrier islands in Pinellas County, Florida. This video was originally created for use at the 2021 virtual St. Petersburg Science Festival.

Listen to audio-described version.

By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Text, "Secrets of the Sediment on Barrier Islands" St. Pete Coastal/Marine Science Center" over photo of hand holding sand

Secrets of the Sediment on Barrier Islands

Secrets of the Sediment on Barrier Islands

Join the USGS St. Petersburg Coastal and Marine Science Center as they uncover the secrets of the sediment on barrier islands in Pinellas County, Florida. This video was originally created for use at the 2021 virtual St. Petersburg Science Festival.

Listen to audio-described version.

By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Animation of a plot displaying beach elevation over time
Modeled beach profile evolution at Fishing Point, Virginia
Modeled beach profile evolution at Fishing Point, Virginia
Animation of a plot displaying beach elevation over time

Modeled beach profile evolution at Fishing Point, Virginia

Modeled beach profile evolution at Fishing Point, Virginia

Animation displays modeled beach profile elevation as it has evolved at Fishing Point, Virginia. These data are based on historical charts and images and measure distance (in kilometers) of cross-shore accretion. QS is the flux of sand to the beach, and QD is the flux of sand from the beach to the active dune.

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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Animation of a plot displaying beach elevation over time

Modeled beach profile evolution at Fishing Point, Virginia

Modeled beach profile evolution at Fishing Point, Virginia

Animation displays modeled beach profile elevation as it has evolved at Fishing Point, Virginia. These data are based on historical charts and images and measure distance (in kilometers) of cross-shore accretion. QS is the flux of sand to the beach, and QD is the flux of sand from the beach to the active dune.

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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Marsh and sand on a bay beach with buildings in the distant background
Eroding marshes on the bay behind Long Beach Island, New Jersey
Eroding marshes on the bay behind Long Beach Island, New Jersey
Marsh and sand on a bay beach with buildings in the distant background

Eroding marshes on the bay behind Long Beach Island, New Jersey

Eroding marshes on the bay behind Long Beach Island, New Jersey

The remnants of an eroding marsh sit on a bayside beach behind Long Beach Island, New Jersey. Marsh loss and bayside erosion can be outcomes of both natural landscape evolution and human modification of coastal barrier systems.

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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Marsh and sand on a bay beach with buildings in the distant background

Eroding marshes on the bay behind Long Beach Island, New Jersey

Eroding marshes on the bay behind Long Beach Island, New Jersey

The remnants of an eroding marsh sit on a bayside beach behind Long Beach Island, New Jersey. Marsh loss and bayside erosion can be outcomes of both natural landscape evolution and human modification of coastal barrier systems.

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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Implications for the resilience of modern coastal systems derived from mesoscale barrier dynamics at Fire Island, New York

Understanding the response of coastal barriers to future changes in rates of sea level rise, sediment availability, and storm intensity/frequency is essential for coastal planning, including socioeconomic and ecological management. Identifying drivers of past changes in barrier morphology, as well as barrier sensitivity to these forces, is necessary to accomplish this. Using remote sensing, field,
Authors
Daniel J. Ciarletta, Jennifer L. Miselis, Julie Bernier, Arnell S. Forde
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St. Petersburg Coastal and Marine Science Center

Exploring centennial barrier-inlet evolution: Insights from undeveloped and developed phases at Barnegat Inlet, New Jersey

This study aims to identify the natural processes and the subsequent responses to coastal engineering and development on the alongshore evolution of the IB-BI-LBI inlet-barrier system. The primary focus will be the quantification of barrier island and inlet sediment partitioning at decadal to centennial timescales, from 1839-1941. We analyze historical alongshore evolution and track coastal engine

Authors
Shane Nichols-O'Neill, Jorge Lorenzo-Trueba, Daniel J. Ciarletta, Jennifer L. Miselis
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Reconstructing the geomorphic evolution and sediment budget history of a dynamic barrier island: Anclote Key, Florida

Decadal to centennial variations in sediment availability are a primary driver of coastal change within barrier systems. Models help explore how barrier morphology relates to past changes in magnitude of sediment availability, but this requires insights and validation from field efforts. In this study, we investigate the progradation of Anclote Key via its morphostratigraphy, a presently dynamic b
Authors
Daniel J. Ciarletta, Jennifer L. Miselis, Julie Bernier, Arnell S. Forde, Shannon A. Mahan
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Geosciences and Environmental Change Science Center, St. Petersburg Coastal and Marine Science Center

Incorporating wave climate complexity into modeling lower shoreface morphology and transport

The lower shoreface, a transitional subaqueous region extending from the seaward limit of the surf zone to beyond the closure depth, serves as a sediment reservoir and pathway in sandy beach environments over annual to millennial time scales. Despite the important role this region plays in shoreline dynamics, the morphodynamics of the lower shoreface remain poorly quantified and understood. To bet

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Megan Gillen, Andrew D. Ashton, Jennifer L. Miselis, Daniel J. Ciarletta, Emily A. Wei, Christopher R. Sherwood
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

Exploring centennial barrier-inlet evolution: Insights from undeveloped and developed phases at Barnegat Inlet, New Jersey

This study aims to identify the natural processes and the subsequent responses to coastal engineering and development on the alongshore evolution of the IB-BI-LBI inlet-barrier system. The primary focus will be the quantification of barrier island and inlet sediment partitioning at decadal to centennial timescales, from 1839-1941. We analyze historical alongshore evolution and track coastal engine
Authors
Shane Nichols-O'Neill, Jorge Lorenzo-Trueba, Daniel J. Ciarletta, Jennifer L. Miselis
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St. Petersburg Coastal and Marine Science Center

Reconstructing the geomorphic evolution and sediment budget history of a dynamic barrier island: Anclote Key, Florida

Decadal to centennial variations in sediment availability are a primary driver of coastal change within barrier systems. Models help explore how barrier morphology relates to past changes in magnitude of sediment availability, but this requires insights and validation from field efforts. In this study, we investigate the progradation of Anclote Key via its morphostratigraphy, a presently dynamic b

Authors
Daniel J. Ciarletta, Jennifer L. Miselis, Julie Bernier, Arnell S. Forde, Shannon A. Mahan
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Coastal and Marine Hazards and Resources Program, Geosciences and Environmental Change Science Center, St. Petersburg Coastal and Marine Science Center

Undeveloped and developed phases in the centennial evolution of a barrier-marsh-lagoon system: The case of Long Beach Island, New Jersey

Barrier islands and their associated backbarrier environments protect mainland population centers and infrastructure from storm impacts, support biodiversity, and provide long-term carbon storage, among other ecosystem services. Despite their socio-economic and ecological importance, the response of coupled barrier-marsh-lagoon environments to sea-level rise is poorly understood. Undeveloped barri

Authors
Christopher Tenebruso, Shane Nichols-O'Neill, Jorge Lorenzo-Trueba, Daniel J. Ciarletta, Jennifer L. Miselis
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Impacts of sediment removal from and placement in coastal barrier island systems

Executive SummaryOn June 24, 2019, Congressman Raul Grijalva of Arizona, Chair of the House Committee on Natural Resources, sent a letter to the directors of the U.S. Fish and Wildlife Service and the U.S. Geological Survey to request their assistance in answering questions regarding coastal sediment resource management within the Coastal Barrier Resources System as defined by the Coastal Barrier

Authors
Jennifer L. Miselis, James G. Flocks, Sara Zeigler, Davina Passeri, David R. Smith, Jill Bourque, Christopher R. Sherwood, Christopher G. Smith, Daniel J. Ciarletta, Kathryn Smith, Kristen Hart, David C. Kazyak, Alicia Berlin, Bianca Prohaska, Teresa Calleson, Kristi Yanchis
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Ecosystems Mission Area, Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Mendenhall Research Fellowship Program, St. Petersburg Coastal and Marine Science Center, Wetland and Aquatic Research Center , Gulf of Mexico

Quantifying thresholds of barrier geomorphic change in a cross-shore sediment-partitioning model

Barrier coasts, including barrier islands, beach-ridge plains, and associated landforms, can assume a broad spectrum of morphologies over multi-decadal scales that reflect conditions of sediment availability, accommodation, and relative sea-level rise. However, the quantitative thresholds of these controls on barrier-system behavior remain largely unexplored, even as modern sea-level rise and anth

Authors
Daniel J. Ciarletta, Jennifer L. Miselis, Justin L. Shawler, Christopher J. Hein
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Coastal and Marine Hazards and Resources Program, Mendenhall Research Fellowship Program, St. Petersburg Coastal and Marine Science Center, Gulf of Mexico

Relative influence of antecedent topography and sea-level rise on barrier-island migration

The response of barrier islands to sea-level rise is modulated by combinations of coastal processes, eco-geomorphic feedbacks, and structural controls, such as antecedent topography. Interactions among these drivers can lead to complex and non-linear changes in island morphology and transitions between migrational, erosional, or progradational states. This study seeks to constrain the morphologic
Authors
Justin L. Shawler, Daniel J. Ciarletta, Jennifer E. Connell, Bianca Q. Boggs, Jorge Lorenzo-Trueba, Christopher J. Hein
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Python-based Subaerial Barrier Sediment Partitioning (pySBSP) model (ver. 1.0, February 2024)

The Python-based Subaerial Barrier Sediment Partitioning (pySBSP) model is a framework to simulate the morphological development of an idealized barrier coast in the cross-shore domain. It is based off the original framework of the same name, which is coded in in MATLAB. pySBSP consists of two scripts; one includes a basic graphical user interface (GUI) to simplify parameter input, while the other
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St. Petersburg Coastal and Marine Science Center

Subaerial Barrier Sediment Partitioning (SBSP) Model Version 1.0

The Subaerial Barrier Sediment Partitioning (SBSP) model is a framework to simulate the morphological development of an idealized barrier coast in the cross-shore domain. The model code, built in MATLAB, consists of two scripts which must reside within the same folder when executed. The first, SBSP_InputControl.m, contains the user-defined input variables to run the simulation. The second, SBSP_Pr
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Researchers discuss how differing degrees of coastline engineering at Long Island barrier islands influence their morphologic evolution at City College of New York seminar

Researchers discuss how differing degrees of coastline engineering at Long Island barrier islands influence their morphologic evolution at City College of New York seminar

SPCMSC Research Geologists Daniel Ciarletta and Emily Wei will present a talk, “Comparing the impacts of framework geology and coastal management on...

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Researchers with SPCMSC and Montclair State University Explore the Impacts of Human Development on Coastal Evolution

Researchers with SPCMSC and Montclair State University Explore the Impacts of Human Development on Coastal Evolution

SPCMSC researchers Jennifer Miselis and Daniel Ciarletta and Montclair State University collaborators publish an investigation of historical and...

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Overcoming research challenges amid the COVID-19 pandemic

Overcoming research challenges amid the COVID-19 pandemic

The USGS Mendenhall Research Fellowship Program is a prestigious opportunity for early career geoscientists to enhance their scientific stature and...

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SPCMSC Scientists Investigating Coastal Geology in Pinellas County, Florida

SPCMSC Scientists Investigating Coastal Geology in Pinellas County, Florida

SPCMSC geologists Daniel Ciarletta, Julie Bernier, and Nancy DeWitt are collecting ground-penetrating radar profiles and vibracores from Pinellas...

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SPCMSC Scientists to Investigate Geology of Pinellas County, Florida Barrier Islands

SPCMSC Scientists to Investigate Geology of Pinellas County, Florida Barrier Islands

SPCMSC geologists Daniel Ciarletta, Julie Bernier, and Nancy DeWitt will be collecting field data from the barrier islands of Pinellas County, Florida...

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SPCMSC Mendenhall fellow presents research for Natural Hazards Mission Area

SPCMSC Mendenhall fellow presents research for Natural Hazards Mission Area

Presentation by USGS scientist Daniel Ciarletta highlights Mendenhall research to Natural Hazards Mission Area leadership and colleagues.

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