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Filter Total Items: 1414
Postfire sediment mobilization and its downstream implications across California, 1984 – 2021 Postfire sediment mobilization and its downstream implications across California, 1984 – 2021
Fire facilitates erosion through changes in vegetation and soil, with major postfire erosion commonly occurring even with moderate rainfall. As climate warms, the western United States (U.S.) is experiencing an intensifying fire regime and increasing frequency of extreme rain. We evaluated whether these hydroclimatic changes are evident in patterns of postfire erosion by modeling...
Authors
Helen Dow, Amy East, Joel B. Sankey, Jonathan Warrick, Jaime Kostelnik, Donald Lindsay, Jason Kean
Post-glacial stratigraphy and late Holocene record of great Cascadia earthquakes in Ozette Lake, Washington, USA Post-glacial stratigraphy and late Holocene record of great Cascadia earthquakes in Ozette Lake, Washington, USA
Ozette Lake is an ~100-m-deep coastal lake located along the outer coast of the Olympic Peninsula (Washington, USA); it is situated above the locked portion of the northern Cascadia megathrust but also relatively isolated from active crustal faults and intraslab earthquakes. Here we present a suite of geophysical and geological evidence for earthquake-triggered mass transport deposits...
Authors
Daniel Brothers, Brian Sherrod, Drake Singleton, Jason Padgett, Jenna Hill, Andrew C. Ritchie, Jared W. Kluesner, Peter Dartnell
Remote sensing large-wood storage downstream of reservoirs during and after dam removal: Elwha River, Washington, USA Remote sensing large-wood storage downstream of reservoirs during and after dam removal: Elwha River, Washington, USA
Large wood is an integral part of many rivers, often defining river-corridor morphology and habitat, but its occurrence, magnitude, and evolution in a river system are much less well understood than the sedimentary and hydraulic components, and due to methodological limitations, have seldom previously been mapped in substantial detail. We present a new method for this, representing a...
Authors
Daniel D. Buscombe, Jonathan Warrick, Andrew C. Ritchie, Amy East, M. McHenry, Randall McCoy, Amy Foxgrover, E. Wohl
Quantifying the coastal hazard risk reduction benefits of coral reef restoration in the U.S. Virgin Islands Quantifying the coastal hazard risk reduction benefits of coral reef restoration in the U.S. Virgin Islands
Coastal habitat restoration, especially of coral reef ecosystems, can significantly reduce the exposure of coastal communities to natural hazards and, consequently, the risk of wave-driven flooding. Likewise, reef degradation can increase coastal flood risks to people and property. In this study, the valuation of coral reefs in the United States Virgin Islands (USVI), along the coasts of...
Authors
Camila Gaido-Lasserre, Valerie Pietsch McNulty, Curt Storlazzi, Borja Reguero, Denise Perez, Sandra Fogg, Kristen A. Cumming, Jessica Ward, Steve Schill, Celeste Jarvis, Michael Beck
Significant challenges to the sustainability of the California coast considering climate change Significant challenges to the sustainability of the California coast considering climate change
Climate change is an existential threat to the environmental and socioeconomic sustainability of the coastal zone and impacts will be complex and widespread. Evidence from California and across the United States shows that climate change is impacting coastal communities and challenging managers with a plethora of stressors already present. Widespread action could be taken that would...
Authors
Karen Thorne, Glen MacDonald, Francisco Chavez, Richard Ambrose, Patrick Barnard
Reversal in estuarine sand supply driven by Holocene sea level rise: A model for sand transport in large structural estuaries, San Francisco Bay, California, USA Reversal in estuarine sand supply driven by Holocene sea level rise: A model for sand transport in large structural estuaries, San Francisco Bay, California, USA
Reversal in estuarine sand supply driven by Holocene sea level rise: A model for sand transport in large structural estuaries, San Francisco Bay, California, USA
Authors
M.A. Malkowski, Z.T. Sickmann, Theresa Fregoso, Lester McKee, D. Stockli, Bruce E. Jaffe
Post-fire sediment yield from a central California watershed: Field measurements and validation of the WEPP model Post-fire sediment yield from a central California watershed: Field measurements and validation of the WEPP model
In a warming climate, an intensifying fire regime and higher likelihood of extreme rain are expected to increase watershed sediment yield in many regions. Understanding regional variability in landscape response to fire and post-fire rainfall is essential for managing water resources and infrastructure. We measured sediment yield resulting from sequential wildfire and extreme rain and...
Authors
Amy East, Joshua Logan, Helen Dow, Douglas Smith, Pat Iampietro, Jonathan Warrick, Thomas Lorenson, Leticia Hallas, Benjamin Kozlowicz
Palaeontological signatures of the Anthropocene are distinct from those of previous epochs Palaeontological signatures of the Anthropocene are distinct from those of previous epochs
The “Great Acceleration” beginning in the mid-20th century provides the causal mechanism of the Anthropocene, which has been proposed as a new epoch of geological time beginning in 1952 CE. Here we identify key parameters and their diagnostic palaeontological signals of the Anthropocene, including the rapid breakdown of discrete biogeographical ranges for marine and terrestrial species...
Authors
Mark Williams, Jan Zalasiewicz, Anthony Barnosky, Reinhold Leinfelder, Martin Head, Colin Waters, Francine McCarthy, Alejandro Cearreta, David Aldridge, Mary McGann, Bruce Hamilton, Colin Summerhayes, Jaia Syvitski, Jens Zinke, Andrew Cundy, Barbara Fialkiewicz-Koziel, J.R. McNeill, Michinobu Kuwae, Neil Rose, Simon Turner, Yoshiki Saito, Michael Wagreich, M. Stegner, Moriaki Yasuhara, Yongming Han, Amy Wrisdale, Rachael Holmes, Juan Berrio
Seasonality of retreat rate of a wave-exposed marsh edge Seasonality of retreat rate of a wave-exposed marsh edge
Wave-driven erosion of marsh boundaries is a major cause of marsh loss, but little research has captured the effect of seasonal differences on marsh-edge retreat rates to illuminate temporal patterns of when the majority of this erosion is occurring. Using five surface models captured over a study year of a marsh with a steep escarped boundary in South San Francisco Bay, we find a...
Authors
Lukas WinklerPrins, Jessica Lacy, Mark T. Stacey, Joshua Logan, Andrew Stevens
Invertebrate trophic structure on marine ferromanganese and phosphorite hardgrounds Invertebrate trophic structure on marine ferromanganese and phosphorite hardgrounds
The Southern California Borderland hosts a variety of geologic and oceanographic features that allow for diverse habitats to occur in a restricted region with a strong oxygen minimum zone (OMZ) and hard substrates. These include ferromanganese (FeMn) crusts and phosphorites targeted for deep-seabed mining in other regions. Baseline studies regarding hardground macro- (> 0.3 mm) and...
Authors
Olivia Pereira, Devin Vlach, Angelica Bradley, Jennifer Gonzalez, Kira Mizell, Lisa Levin
State of California sea level rise guidance: 2024 Science and policy update State of California sea level rise guidance: 2024 Science and policy update
No abstract available.
Authors
Susheel Adusumilli, Patrick Barnard, Daniel R. Cayan, Laura Engeman, Gary B. Griggs, Benjamin Hamlington, Kristina Hill, Felix Landerer, Phillip Thompson
CoastSeg: An accessible and extendable hub for satellite-derived-shoreline (SDS) detection and mapping CoastSeg: An accessible and extendable hub for satellite-derived-shoreline (SDS) detection and mapping
CoastSeg is an interactive browser-based program that aims to broaden the adoption of satellite-derived shoreline (SDS) detection and coastal landcover mapping workflows among coastal scientists and coastal resource management practitioners. SDS is a sub-field of coastal sciences that aims to detect and post-process a time-series of shoreline locations from publicly available satellite...
Authors
Sharon Fitzpatrick, Daniel Buscombe, Jonathan Warrick, Mark Lundine, Kilian Vos