Download or read book Stable Isotopic Composition of Total Organic Carbon in Bottom Sediments of Lake Baikal as a Proxy for Paleoclimatology written by Alexander A. Prokopenko and published by . This book was released on 1997 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long Continental Records from Lake Baikal written by Kenji Kashiwaya and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake Baikal in eastern Siberia is a crucial site for detecting long-term global changes, owing to its high sensitivity to climatic oscillation and its extraordinarily long history. Because lacustrine sediments have an advantage in providing high-resolution information, the sediments in Lake Baikal contain excellent continuous records of past conditions including paleoclimates, evolution, and specification of organisms. Based on the study by the Baikal Drilling Project, this book provides information on global climatic and environmental changes for as much as 12 million years. The book also includes discussions of comparatively short-term changes such as glacial and interglacial transitions that directly link to the present and future environment. Long Continental Records from Lake Baikal summarizes the latest knowledge on the paleoenvironment and provides a foundation for further studies in global environmental changes.
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1996 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lake Baikal written by K. Minoura and published by Elsevier. This book was released on 2000-12-08 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake Baikal is the oldest lake and largest freshwater reservoir in the world. As a result of its exceptionally long geological history, the lake has been a theatre of evolution and speciation of organisms, and it currently harbors more species than any other lake in the world. Based on its unique nature, Lake Baikal was recently designated a World Heritage site and is regarded as a hotspot for evolution, speciation, and biodiversity. With its tremendously peculiar biota, Lake Baikal is now awaiting modern analytical approaches to the profound problems of speciation and evolution. In late autumn 1998 a symposium was held in Japan with the theme "Lake Baikal: A mirror in time and space for understanding global change processes" to bring together scientists from different disciplines who are studying Lake Baikal. Three international scientific associations: The BICER (Baikal International Center for Ecological Research), BDP (Baikal Drilling Project), and DIWPA (Diversitas Western Pacific and Asia) were involved in the organisation. This book contains a selection of papers presented at this symposium. They are interdisciplinary in nature and bring together results from geology, paleontology, chemistry, biology, limnology and physics.
Download or read book Palaeoclimates and Palaeowaters written by International Atomic Energy Agency and published by . This book was released on 1983 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Problems of Stable Isotopes in Tree rings Lake Sediments and Peat bogs as Climatic Evidence for the Holocene written by Burkhard Frenzel and published by Wiley-VCH. This book was released on 1995 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paleoclimate Implications from Stable Isotope Analysis of Sedimentary Organic Carbon and Vertebrate Fossils from the Cedar Mountain Formation UT U S A written by Garrett A. Hatzell and published by . This book was released on 2015 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxygen and carbon isotopic compositions of fossilized vertebrate teeth and bone were analyzed to determine isotopic values of vertebrate faunal diet from the early Cretaceous Cedar Mountain Formation of Utah. Results for delta 18O of PO4 (delta18Op) (Suarez et al., 2014) from the same data set have been compared to the delta 18O of CO3 (delta18Oc) portion of teeth and turtle shell to determine if diagenetic alteration of the isotopes has occurred by plotting the line of best fit equation that models the relationship between unaltered delta18OP and delta 18OC of modern mammals from Iacumin et al., 1996. Results indicate slight diagenesis of some specimens has occurred.
Download or read book Stable Isotopic and Stratigraphic Proxy Records of Local Regional and Global Climate written by Carl Norman Drummond and published by . This book was released on 1994 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stable Isotopic Composition and Phosphorus Concentration in Sediment from Two Southern California Lakes written by Simone Claire Boudreau and published by . This book was released on 2015 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excessive nutrient loading to lakes reduces water clarity, degrades biological habitat, limits light penetration, and often results in anoxia. Increased watershed urbanization is a major contributing factor of externally loaded nutrients. But even in lakes that have successfully reduced external nutrient loading rates, high nutrient concentrations may persist due to internal nutrient recycling within lake sediments. Internal phosphorus (P) cycling dynamics are a balance between sedimentation, which depends on the mineralization rate of settling organic matter; diagenetic processes within the sediment after deposition; and remobilization of P after deposition, which depends on mobile P content and elemental composition of the sediment. The interplay between these processes determines whether phosphorus is recycled or sequestered in the sediment, as well as how long it remains bioavailable. Measurement of the stable isotopes of carbon and nitrogen in sediment have enabled assessment of the sources and degree of cycling of organic matter, which is important in controlling P burial and release. In this study, stable isotopic composition, elemental composition, and phosphorus forms in the sediment from two southern California lakes that are impaired due to nutrients are assessed to determine how dynamic hydrologic conditions and management actions have influenced water and sediment quality in order to gain insight into how sediment properties and biogeochemical processes respond to varying conditions in each lake. The results of the study provide a comprehensive understanding of the sedimentological processes occurring in the lakes, which is imperative to accurately predict eutrophication trajectories and the impact that future events will have on water quality in order to develop the most effective nutrient mitigation strategies.
Download or read book Sustainable Development of the Lake Baikal Region written by Valentin A. Koptyug and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake Baikal is the oldest, largest and deepest lake in the world. Its unique animal life and the beauty of the surrounding landscapes are renowned. The book discusses the sustainable development of the lake and its use as a model for the rest of the world. It consolidates existing data on the current state of the environment and economy of the region, develops a system of indicators of sustainable developments, makes recommendations on additional components to the existing monitoring system and considers a legal framework and instrument for its implementation.
Download or read book Paleoproductivity and Paleoclimatology of Eastern Lake Ontario Over the Last 10 000 Cal Yrs written by Melany Ann McFadden and published by . This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lake Baikal and Its Life written by M. Kozhov and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: Baikai is the deepest lake on earth and one of the most ancient. The pronounced endemism and specific wealth of its fauna andflora has attracted the keen interest of biologists and biogeographers all over the world. A start on the Baikai studies was made more than 200 years ago, but they have been carried on with the greatest intensity in the last 30 to 40 years, and more than 1,000 scientific works devoted to it have appeared in this period. Hence there is an urgent need for a summary of the main results of more than 200 years' study of one of the most remarkable lakes of our planet, and this the author has endeavoured to provide. A zoologist and hydrobiologist hirnself, he has concentrated on the living world of the lake. The author has for many years worked at Baikai as head of the Biologo-Geographical Institute and the Baikai Biological Station of Irkutsk University. In preparing this book for the press the author has received invaluable assistance from cartographer N.V. TYUMEN TSEV, algologists N.L. ANTIPOVAandO. M. KOZHOVA, hydrobiologists G. L. VASILYEVA, G. J. SHNYAGINA, L. J. PROTASOVA and R. A.
Download or read book Carbon and Oxygen Isotopic Composition of Holocene Lake Sediments from Okanogan County Washington written by Jeffrey Forbes and published by . This book was released on 1987 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lake Baikal written by Olʹga Mikhaĭlovna Kozhova and published by . This book was released on 1998 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Isotopic Investigation of Lake Sediments written by Krista A. Syrup and published by . This book was released on 2002 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: A lake core was obtained at Austin Lake in Kalamazoo County, Michigan. The organic matter from the lake sediments were prepared for isotopic analysis of [delta superscript 13]C and [delta]D, as well as the C/N and H/C ratios. The [delta]D values throughout the core reveal four distinct isotope stages within the last 12,000 years that can be interpreted in terms of oscillations between cold and warm, dry climates. A cold phase between 12,000 and 9000 years before present (B.P.), a warm, dry period between 8500 and 2000 years B.P., a cold period between 2000 and 1000 years B.P., and a warming trend since 1000 years B.P. The C/N ratios of the HCl fraction ranged from 11 to 12, which is typical of organic carbon formed within the lakes. However, the C/N ratios of HF-HCL fraction were larger 13 to 25, showing that some nitrogen was lost due to the HF-HCl digestion. The [delta superscript 13]C values of the two fractions, one obtained by demineralization using dilute hydrochloric acid ([delta superscript 13]C[subscript HF-HCl]), ranged from -24 to -12 [per mille] with the [delta superscript 13]C[subscript HF-HCl] fraction generally more negative. A [Delta superscript 13]C parameter defined [Delta superscript 13]C=[delta superscript 13]C[subscript HC-l]-[delta superscript 13]C[subscript HF-HCl] should show differences in preservation of nitrogenous compounds in the organic matter. The [Delta superscript 13]C parameter also correlates with the [delta]D of the HF-HCl fraction, suggesting that preservation of nitrogenous compounds is perhaps climatically controlled.
Download or read book Water and Environment in the Selenga Baikal Basin written by Daniel Karthe and published by Columbia University Press. This book was released on 2016-03-15 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The water resources of the Selenga River/Lake Baikal system are essential to the ecosystems and economic development of the surrounding region. In this large river and lake basin, there are strong contrasts between relatively pristine areas and massive anthropogenic impacts on the environment. The effects of climate change are more pronounced than in most other parts of the earth, and the transition from socialism into a market-oriented economy has led to a boom in mining but also to a partial collapse of environmental monitoring and urban wastewater management systems. Moreover, the expansion of agriculture and mining has triggered considerable land use change, rising water consumption, and the release of contaminants that had previously been unknown to the region. The consequences for the water resources and the aquatic and terrestrial ecosystems depending on them have become increasingly visible in recent years. This book, which is based on contributions to the 2014 Bringing Together Selenga-Baikal Research Conference, provides multidisciplinary insight into current water-related challenges and strategies for their solution from the viewpoint of the international scientific community.
Download or read book Sustainable Development of the Lake Baikal Region written by Valentin A. Koptyug and published by . This book was released on 2014-01-15 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
