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Book Long Term Sediment Accumulation Rates and Organic Carbon Burial on the Middle Eel Shelf Northern California

Download or read book Long Term Sediment Accumulation Rates and Organic Carbon Burial on the Middle Eel Shelf Northern California written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Earth's continental margins are currently the primary site of organic carbon burial. Over geologic time the burial and preservation of organic carbon plays a significant role in regulating atmospheric composition. The efficiency at which organic carbon is buried is influenced by many factors that include dissolved oxygen levels, sedimentation rates, and organic carbon composition. The Eel River shelf off of northern California is a well-studied system that is ideal for exploring the interplay between some of these factors. Examination of a recent piston core taken from the middle Eel shelf off the coast of northern California revealed that sediment accumulation rates over the last five decades are elevated when compared to the previous 1900 years. 14C-dating of woody debris and clay organic carbon indicate that accumulation rates range between 0.9-1.4 cm/yr over the later half of the 20th century. However, prior to 1964-1955 sediment accumulation rates were 0.15"0.02 cm/yr. A change in core stratigraphy was also observed at a depth corresponding to the middle 20th century. Modern shelf sediments were finer grained and dominated by more frequent flood deposits when compared to sediments deposited before the later half of the past century. Despite the recent increase in preserved flood layers off shore of the Eel River, correlation between reconstructed river discharge of the nearby Sacramento River and the Eel River revealed that current levels of discharge are not unique over the past 2000 years. Therefore increased precipitation is not thought to be the key factor for the change in sedimentation on the middle shelf. Instead, the peak of logging activity in the basin was correlated to change in sedimentation. 14C-ages of woody debris recovered from the piston core revealed that old growth wood was present only in shelf sediments below a depth that corresponds to the 1955-1964 era. Therefore, land use alteration is a key reason for the.

Book Long term Sediment Accumulation Rates and Organic Carbon Burial on the Middle Eel Shelf

Download or read book Long term Sediment Accumulation Rates and Organic Carbon Burial on the Middle Eel Shelf written by David Wayne Perkey and published by . This book was released on 2003 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: organic carbon burial, marine sediment, accumulation rates, Eel River.

Book Use of Organic Carbon and Grain Size Characteristics to Monitor the Short Term Fate of a Flood Deposit Eel River Shelf Northern California

Download or read book Use of Organic Carbon and Grain Size Characteristics to Monitor the Short Term Fate of a Flood Deposit Eel River Shelf Northern California written by Rebecca Skye Hope and published by . This book was released on 1997 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Fluid Flow and Deformation at an Active Continental Margin

Download or read book Fluid Flow and Deformation at an Active Continental Margin written by Janet Wai Ngan Yun and published by . This book was released on 2000 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Sediment Transport and Turbidity in the Eel River Basin California

Download or read book Sediment Transport and Turbidity in the Eel River Basin California written by William Madison Brown and published by . This book was released on 1971 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Sedimentation Patterns and Fluid Flow Through Sediments

Download or read book Sedimentation Patterns and Fluid Flow Through Sediments written by Glenn Allan Spinelli and published by . This book was released on 2002 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Circulation on the Northern California Shelf and Slope

Download or read book Circulation on the Northern California Shelf and Slope written by and published by . This book was released on 1991 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Continental Shelf Sedimentation and Holocene Development of the Northern California Coast Eel River and Humboldt Bay Area

Download or read book Continental Shelf Sedimentation and Holocene Development of the Northern California Coast Eel River and Humboldt Bay Area written by Danny O'Shea and published by . This book was released on 2005 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Sea Level Rise for the Coasts of California Oregon and Washington

Download or read book Sea Level Rise for the Coasts of California Oregon and Washington written by National Research Council and published by National Academies Press. This book was released on 2012-12-06 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Book Handbook of Sea Level Research

Download or read book Handbook of Sea Level Research written by Ian Shennan and published by John Wiley & Sons. This book was released on 2015-02-19 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measuring sea-level change – be that rise or fall – is one of the most pressing scientific goals of our time and requires robust scientific approaches and techniques. This Handbook aims to provide a practical guide to readers interested in this challenge, from the initial design of research approaches through to the practical issues of data collection and interpretation from a diverse range of coastal environments. Building on thirty years of international research, the Handbook comprises 38 chapters that are authored by leading experts from around the world. The Handbook will be an important resource to scientists interested and involved in understanding sea-level changes across a broad range of disciplines, policy makers wanting to appreciate our current state of knowledge of sea-level change over different timescales, and many teachers at the university level, as well as advanced-level undergraduates and postgraduate research students, wanting to learn more about sea-level change. Additional resources for this book can be found at: www.wiley.com\go\shennan\sealevel

Book Effects of Gravel Morphology on Fine Sediment Accumulation and Survival of Incubating Salmon Eggs

Download or read book Effects of Gravel Morphology on Fine Sediment Accumulation and Survival of Incubating Salmon Eggs written by William R. Meehan and published by . This book was released on 1977 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rate of fine sediment accumulation and survival of pink salmon eggs were determined for three types of stream gravels. At low stream flows, round gravel accumulated somewhat more sediment than other gravel types, while at higher discharges angular gravel accumulated more sediment. Survival of pink salmon eggs was slightly higher in angular gravel.

Book The Continental Margin Off Northern California

Download or read book The Continental Margin Off Northern California written by Eli A. Silver and published by . This book was released on 1968 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: