Tidal Band Current Variability Over the Northern California Continental Shelf PDF Download

Author: Leslie Karen Rosenfeld
Publisher:
ISBN:
Category : Ocean currents
Languages : en
Pages : 808

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Author:
Publisher:
ISBN:
Category : Continental shelf
Languages : en
Pages : 664

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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309255945
Category : Science
Languages : en
Pages : 274

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Tide gauges show that global sea level has risen about 7 inches during the 20th century, and recent satellite data show that the rate of sea-level rise is accelerating. As Earth warms, sea levels are rising mainly because ocean water expands as it warms; and water from melting glaciers and ice sheets is flowing into the ocean. Sea-level rise poses enormous risks to the valuable infrastructure, development, and wetlands that line much of the 1,600 mile shoreline of California, Oregon, and Washington. As those states seek to incorporate projections of sea-level rise into coastal planning, they asked the National Research Council to make independent projections of sea-level rise along their coasts for the years 2030, 2050, and 2100, taking into account regional factors that affect sea level. Sea-Level Rise for the Coasts of California, Oregon, and Washington: Past, Present, and Future explains that sea level along the U.S. west coast is affected by a number of factors. These include: climate patterns such as the El Niño, effects from the melting of modern and ancient ice sheets, and geologic processes, such as plate tectonics. Regional projections for California, Oregon, and Washington show a sharp distinction at Cape Mendocino in northern California. South of that point, sea-level rise is expected to be very close to global projections. However, projections are lower north of Cape Mendocino because the land is being pushed upward as the ocean plate moves under the continental plate along the Cascadia Subduction Zone. However, an earthquake magnitude 8 or larger, which occurs in the region every few hundred to 1,000 years, would cause the land to drop and sea level to suddenly rise.

Author: Carmen M. Fraticelli
Publisher:
ISBN: 9781565763463
Category : Geology, Stratigraphic
Languages : en
Pages : 0

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It is self-evident that a better understanding of depositional systems and analogs leads to better inputs for geological models and better assessment of risk for plays and prospects in hydrocarbon exploration, as well as enhancing interpretations of earth history. Depositional environments - clastic and carbonate, fine- and coarse-grained, continental, marginal marine and deep marine - show latitudinal variations, which are sometimes extreme. Most familiar facies models derive from temperate and, to a lesser extent, tropical examples. By comparison, depositional analogs from higher latitudes are sparser in number and more poorly understood. Numerous processes are amplified and/or diminished at higher latitudes, producing variations in stratigraphic architecture from more familiar depositional "norms." The joint AAPG/SEPM Hedberg Conference held in Banff, Alberta, Canada in October 2014 brought together broad studies looking at global databases to identify differences in stratigraphic models and sedimentary concepts that arise due to differences in latitude and to search for insights that may be applicable for subsurface interpretations. The articles in this Special Publication represent a cross-section of the work presented at the conference, along with the abstracts of the remaining presentations. This volume should be of great interest to all those working with stratigraphic models and sedimentary concepts.

Author: Pacific Marine Environmental Laboratory (U.S.)
Publisher:
ISBN:
Category : Marine ecology
Languages : en
Pages : 344

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Author:
Publisher:
ISBN:
Category : Continental shelf
Languages : en
Pages :

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Author: United States. Congress. House. Committee on Merchant Marine and Fisheries. Subcommittee on Panama Canal/Outer Continental Shelf
Publisher:
ISBN:
Category : Continental shelf
Languages : en
Pages : 162

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Author: National Research Council (U.S.). Committee to Review the Outer Continental Shelf Environmental Studies Program
Publisher: National Academies
ISBN:
Category :
Languages : en
Pages : 102

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Author: Emil T. Petruncio
Publisher:
ISBN:
Category : Tidal currents
Languages : en
Pages : 124

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A first order description of tidal heights and currents in Monterey Bay is provided. Analysis of sea level records indicate that a mixed, predominantly semidiurnal tide nearly co-oscillates within the bay. Analysis of month-long moored ADCP records obtained in the winter and summer of 1992 reveals that tidal-band currents account for approximately 50 percent of the total current variance in the upper ocean (20-200 m). A relatively strong (7 cm/s) fortnightly tide (MSf) is present in both seasons. Considerable rotation of the semidiurnal ellipse orientations occurs with depth during both seasons. A month- long record of surface current measurements obtained with CODAR, an HF radar system, during September 1992 reveals that the Monterey Submarine Canyon clearly influences the strength and direction of semidiurnal (M2) tidal currents. Good agreement exists between the strength and orientation of ADCP- and CODAR-derived tidal ellipses, with the exception of the constituent K1. Large, spatially uniform K1 surface currents (20-30 cm/s) appear to be the result of diurnal sea breeze forcing.

Author: Pacific Marine Environmental Laboratory (U.S.)
Publisher:
ISBN:
Category : Oceanography
Languages : en
Pages : 88

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