Zobrazeno 1 - 10
of 88
pro vyhledávání: '"David K. Ralston"'
Autor:
Autumn R. Deitrick, David K. Ralston, Christopher R. Esposito, Melissa M. Baustian, Maricel Beltrán Burgos, Andrew J. Courtois, Heidi Nepf
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 14, Pp n/a-n/a (2024)
Abstract Previous studies have demonstrated that vegetation‐generated turbulence can enhance erosion rate and reduce the velocity threshold for erosion of non‐cohesive sediment. This study considered whether vegetation‐generated turbulence had
Externí odkaz:
https://doaj.org/article/bac236b65efb42a286256ea2ea68e445
Publikováno v:
Frontiers in Marine Science, Vol 10 (2023)
Laboratory experiments measured sediment deposition and turbulent kinetic energy (TKE) in bare and vegetated channels. The model vegetation represented a mangrove pneumatophore canopy. Three solid volume fractions were considered (ϕ= 0.01, 0.02, and
Externí odkaz:
https://doaj.org/article/2e33a14838af4158b37a94c59208268e
Autor:
Jesús Pineda, Walter Cho, Victoria Starczak, Annette F. Govindarajan, Héctor M. Guzman, Yogesh Girdhar, Rusty C. Holleman, James Churchill, Hanumant Singh, David K. Ralston
Publikováno v:
PeerJ, Vol 4, p e1770 (2016)
A research cruise to Hannibal Bank, a seamount and an ecological hotspot in the coastal eastern tropical Pacific Ocean off Panama, explored the zonation, biodiversity, and the ecological processes that contribute to the seamount’s elevated biomass.
Externí odkaz:
https://doaj.org/article/090953b2a1c14651b15d1461df3c733d
Autor:
Suzanna, Clark, Katherine A, Hubbard, Dennis J, McGillicuddy, David K, Ralston, Michael A, Alexander, Enrique, Curchitser, Charles, Stock
Publikováno v:
J Mar Syst
Worldwide, warming ocean temperatures have contributed to extreme harmful algal bloom events and shifts in phytoplankton species composition. In 2016 in the Gulf of Maine (GOM), an unprecedented Pseudo-nitzschia bloom led to the first domoic-acid ind
Autor:
Tong Bo, David K. Ralston
Publikováno v:
Journal of Physical Oceanography. 52:1333-1350
Idealized numerical simulations were conducted to investigate the influence of channel curvature on estuarine stratification and mixing. Stratification is decreased and tidal energy dissipation is increased in sinuous estuaries compared to straight c
Publikováno v:
Journal of Physical Oceanography.
Curvature can create secondary circulation and flow separation in tidal channels, and both have important consequences for the along-channel momentum budget. The North River is a sinuous estuary where drag is observed to be higher than expected, and
Autor:
Suzanna, Clark, Katherine A, Hubbard, Dennis J, McGillicuddy, David K, Ralston, Sugandha, Shankar
Publikováno v:
Continental shelf research. 228
In 2016, an unprecedented Pseudo-nitzschia australis bloom in the Gulf of Maine led to the first shellfishery closures due to domoic acid in the region's history. In this paper, potential introduction routes of
Autor:
Brian Yellen, Sarah Fernald, Jonathan D. Woodruff, Waverly Lau, David K. Ralston, Caroline Ladlow
Publikováno v:
Earth Surface Processes and Landforms. 46:554-572
Tidal marsh restoration and creation has been proposed as a tool to build coastal resilience in the face of rising sea level and increasing intensity of coastal storms. However, it is unclear what conditions within constructed settings will lead to t
Publikováno v:
Estuaries and Coasts. 44:1195-1215
Observations and modeling are used to assess potential impacts of sediment releases due to dam removals on the Hudson River estuary. Watershed sediment loads are calculated based on sediment-discharge rating curves for gauges covering 80% of the wate
Autor:
Cassia Pianca, David K. Ralston, Amy E. Simonson, Neil K. Ganju, Richard A. Cartwright, Robert J. Chant
Publikováno v:
Estuaries and Coasts. 44:608-626
External sediment supply is an important control on wetland morphology and vulnerability to storms, sea-level rise, and land use change. Constraining sediment supply and net budgets is difficult due to multiple timescales of variability in hydrodynam