Clark Alexander

ORCID: 0000-0002-3904-1091
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About
Contact & Profiles
Research Areas
  • Geology and Paleoclimatology Research
  • Geological formations and processes
  • Coastal wetland ecosystem dynamics
  • Coastal and Marine Dynamics
  • Methane Hydrates and Related Phenomena
  • Coastal and Marine Management
  • Marine and environmental studies
  • Marine and fisheries research
  • Isotope Analysis in Ecology
  • Toxic Organic Pollutants Impact
  • Marine and coastal plant biology
  • Groundwater and Isotope Geochemistry
  • Heavy metals in environment
  • Aeolian processes and effects
  • Geological Studies and Exploration
  • Hydrology and Sediment Transport Processes
  • Groundwater flow and contamination studies
  • Tropical and Extratropical Cyclones Research
  • Marine and coastal ecosystems
  • Marine Biology and Ecology Research
  • Mercury impact and mitigation studies
  • Maritime and Coastal Archaeology
  • Underwater Acoustics Research
  • Radioactive element chemistry and processing
  • Geological and Geophysical Studies

University of Georgia
2015-2024

Skidaway Institute of Oceanography
2013-2024

Government of the United States of America
2023

Los Alamos National Laboratory
2023

Georgia Southern University
2010-2011

Lawrence Livermore National Laboratory
2003

University of Regina
2003

Southern California Coastal Water Research Project
2003

University of California, Davis
1994

Stony Brook University
1991

10.1016/0077-7579(91)90016-t article EN Netherlands Journal of Sea Research 1991-12-01

Abstract Despite its widespread use, the ecological effects of shoreline armoring are poorly synthesized and difficult to generalize across soft sediment environments structure types. We developed a conceptual model that scales predicted shore-parallel based on two axes: engineering purpose (reduce/slow velocities or prevent/stop flow waves currents) hydrodynamic energy (e.g., tides, currents, waves) environments. greater impacts for structures intended stop as opposed slow water with...

10.1007/s12237-017-0254-x article EN cc-by Estuaries and Coasts 2017-07-24

Abstract Oceanographic and evolutionary inferences based on fossil assemblages can be obscured by age offsets among co‐occurring shells (i.e., time averaging). To identify the contributions of sedimentation, mixing, durability, production to within‐ between‐species offsets, we analyze downcore changes in age‐frequency distributions two bivalves California shelf. Within‐species are ~50–2,000 years for Parvilucina ~2,000–4,000 Nuculana 1,000–4,000 within 10‐ 25‐cm‐thick stratigraphic units....

10.1029/2018pa003553 article EN publisher-specific-oa Paleoceanography and Paleoclimatology 2019-05-13

Abstract. Slump blocks are widely distributed features along marsh shorelines that can disturb edge habitats and affect geomorphology sediment dynamics. However, little is known about their spatial distribution patterns or longevity movement. We employed an unoccupied aerial vehicle (UAV) to track slump in 11 monthly images (March 2020–March 2021) of Dean Creek, a tidal creek surrounded by salt located on Sapelo Island (GA, USA). were observed both convex concave banks the all images, with...

10.5194/bg-21-1757-2024 article EN cc-by Biogeosciences 2024-04-09

Anthropogenic activities have caused an increase in greenhouse gas emissions, leading to the alarming rate of global temperature and associated climate change impacts. Due these challenges, nature-based solutions for capturing gases, form carbon (C), are becoming significant interest. Several marine dioxide removal (mCDR) methods being advanced, including utilisation brown macroalgae detritus, such as kelp, potentially contributors deep-sea C sinks. Although there several studies that...

10.5194/oos2025-278 preprint EN 2025-03-25

Benthic maps provide the spatial framework for many science and management activities in coastal areas such as identification protection of fish distributions associated habitat well monitoring changes benthos communities. To meet this need at Gray's Reef National Marine Sanctuary off Georgia, U.S.A., coast, we created fine-scale benthic by visual interpretation sonar imagery within a geographic information system. The major bottom types sanctuary—flat sand, rippled hard that is sparsely...

10.2112/03-0101r.1 article EN Journal of Coastal Research 2005-11-01

ABSTRACT Extensive muddy tidal flats along the western coast of Korea are distinctly different from other intertidal environments used as standard models for sedimentation (e.g., North Sea). The Korean lack extensive, dendritic drainage systems, seaward barriers, landward salt marshes, and most sedimentary structures considered diagnostic (i.e., flaser, wavy, ripple-laminated bedding). Fifty-one cores were collected subtidal areas Nam Yang Bay to investigate distribution texture,...

10.1306/d42677da-2b26-11d7-8648000102c1865d article EN Journal of Sedimentary Research 1991-01-01

Abstract Archaeological sites in beach and estuarine environments are continually threatened by diverse natural marine processes. Shoreline erosion, bluff retreat, sea level rise all present potential for site destruction. Using historic maps, aerial imagery, field survey methods a GIS, 21 potentially significant archaeological on Georgia barrier islands were selected determination of site‐specific rates shoreline change using powerful, new, moving‐boundary GIS analysis tool. A prioritized...

10.1002/gea.20309 article EN Geoarchaeology 2010-04-14
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