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  • Release : 01 January 1970
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Arctic Ocean Sediments: Processes, Proxies, and Paleoenvironment

Arctic Ocean Sediments: Processes, Proxies, and Paleoenvironment
  • Author : R. Stein
  • Publisher : Elsevier
  • Release : 22 July 2008
GET THIS BOOKArctic Ocean Sediments: Processes, Proxies, and Paleoenvironment

Although it is generally accepted that the Arctic Ocean is a very sensitive and important region for changes in the global climate, this region is the last major physiographic province of the earth whose short-and long-term geological history is much less known in comparison to other ocean regions. This lack of knowledge is mainly caused by the major technological/logistic problems in reaching this harsh, ice-covered region with normal research vessels and in retrieving long and undisturbed sediment cores. During

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Regional and Temporal Variations of Mineral Assemblages in Arctic Ocean Sediments as Climatic Indicator During Glacial/interglacial Changes


G.

G.
  • Author : Kathleen Ann Gannon
  • Publisher : Anonim
  • Release : 19 September 2021
GET THIS BOOKG.

"Offshore oil development in Arctic Alaska is expanding. Since biodegradation is a major removal mechanism of petroleum hydrocarbons from the environment, baseline data on microorganisms present are important. I estimated microbial populations and their degradation activities in Arctic Ocean sediments, and examined how sediment affects phenanthrene bioavalability. Populations of hydrocarbon degraders were significantly higher in sediments from near Prudhoe Bay than near Barrow. However, microbial counts from Prudhoe Bay were similar to those measured in the 1970s suggesting that the

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Glacial-Marine Sedimentation

Glacial-Marine Sedimentation
  • Author : Bruce F. Molnia
  • Publisher : Springer Science & Business Media
  • Release : 06 December 2012
GET THIS BOOKGlacial-Marine Sedimentation

This volume of 18 papers describes the glacial-marine sedimentary environment in a variety of temporal and spatial settings. The volume's primary emphasis is the characteri zation of Quaternary glacial-marine sedimentation to show (1) the significant differences that exist between glacial marine environments in different geographic settings and (2) their resulting glacial-marine deposits and facies. Addi tionally, papers describing ancient glacial-marine environ ments are also presented to illustrate lithified analogs of the Quaternary deposits. With the Doctrine of Uniformitarianism in mind (the present is

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Strontium Isotopic Composition in Arctic Pleistocene and Pliocene Marine Sediments

Strontium Isotopic Composition in Arctic Pleistocene and Pliocene Marine Sediments
  • Author : Scott Lehman,Woods hole oceanographic institution ma Dept. of geology and geophysics
  • Publisher : Anonim
  • Release : 19 September 1997
GET THIS BOOKStrontium Isotopic Composition in Arctic Pleistocene and Pliocene Marine Sediments

The primary goal of the research was to use 87Sr/86Sr as a geochronometer in Arctic Ocean sediments. This attempt was unsuccessful because the analytical precision of the analysis (+/-0.000010) was insufficient to differentiate the expected change in oceanic 87Sr/86Sr. New data published after the submission of this proposal indicated that the change was on 0.000025, half that of previously published data. However, a study of the strontium isotopic composition of foraminifera from the Arctic implied that there is enrichment

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Paleoclimatic Characterization of Arctic Ocean Sediments Around the Northwind Ridge Using X-ray Fluorescence and Visible-near Infrared Spectroscopy

The Arctic Ocean sediment (AOS) is highly sensitive to global climate changes and has become a focus of much paleoclimatic research. In this study, paleoclimatic characteristics of the AOS have been studied using downcore X-Ray Fluorescence (XRF) data from 13 Healy-Oden TransArctic Expedition cores. Lithological and multi-element variations representing glacial and interglacial cycles were correlated using the variable-based Varimax-rotated Principal Component Analysis (VPCA) of the XRF data. The main components generated by the VPCA have been interpreted as related to terrigenous (

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The Arctic Seas

The Arctic Seas
  • Author : Yvonne Herman
  • Publisher : Springer Science & Business Media
  • Release : 06 December 2012
GET THIS BOOKThe Arctic Seas

The Arctic region has long held a fascination for explorers and scientists of many countries. Despite the numerous voyages of exploration, the na ture of the central Arctic was unknown only 90 years ago; it was believed to be a shallow sea dotted with islands. During Nansen's historic voyage on the polarship Fram, which commenced in 1893, the great depth of the central basin was discovered. In the Soviet Union, investigation of the Arctic Ocean became national policy after 1917. Today research at

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The Organic Carbon Cycle in the Arctic Ocean

The Organic Carbon Cycle in the Arctic Ocean
  • Author : Rüdiger Stein,Robie W. Macdonald
  • Publisher : Springer Science & Business Media
  • Release : 27 June 2011
GET THIS BOOKThe Organic Carbon Cycle in the Arctic Ocean

To understand the global oceanic carbon budget and related climate change, exact measurements of organic carbon flux in all oceans environments, especially the continental margins, are crucial. In fact, data have been available for some time on organic carbon sources, pathways, and burial for most of the world’s oceans, with the notable exception of the Arctic. With this book, the editors remedy this gap in knowledge, presenting an overview of organic-carbon sources, pathways, and burial of the circum-Arctic continental

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