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Author : Urban Wünsch
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.:/5 (935 download)
Download or read book Seasonal Variability of Dissolved Organic Matter in the Columbia River written by Urban Wünsch and published by . This book was released on 2014 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Paula G. Coble
Publisher : Cambridge University Press
ISBN 13 : 0521764610
Total Pages : 407 pages
Book Rating : 4.5/5 (217 download)
Download or read book Aquatic Organic Matter Fluorescence written by Paula G. Coble and published by Cambridge University Press. This book was released on 2014-07-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: A core text on principles, laboratory/field methodologies, and data interpretation for fluorescence applications in aquatic science, for advanced students and researchers.
Author : Amanda J. Rinehart
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (69 download)
Download or read book Dissolved Organic Matter Discharge in the Six Largest Arctic Rivers-chemical Composition and Seasonal Variability written by Amanda J. Rinehart and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The vulnerability of the Arctic to climate change has been realized due to disproportionately large increases in surface air temperatures which are not uniformly distributed over the seasonal cycle. Effects of this temperature shift are widespread in the Arctic but likely include changes to the hydrological cycle and permafrost thaw, which have implications for the mobilization of organic carbon into rivers. The focus of this research was to describe the seasonal variability of the chemical composition of dissolved organic matter (DOM) in the six largest Arctic rivers (Yukon, Mackenzie, Ob, Yenisei, Lena and Kolyma) using optical properties (UV-Vis Absorbance and Fluorescence) and lignin phenol analysis. We also investigated differences between rivers and how watershed characteristics influence DOM composition. Dissolved organic carbon (DOC) concentrations followed the hydrograph with highest concentrations measured during peak river flow. The chemical composition of peak-flow DOM indicates a dominance of freshly leached material with elevated aromaticity, larger molecular weight, and elevated lignin yields relative to base-flow DOM. During peak flow, soils in the watershed are still frozen and snowmelt water follows a lateral flow path to the river channels. As the soils thaw, surface water penetrates deeper into the soil horizons leading to lower DOC concentrations and likely altered composition of DOM due to sorption and microbial degradation processes. The six rivers studied here shared a similar seasonal pattern and chemical composition. There were, however, large differences between rivers in terms of total carbon discharge reflecting the differences in watershed characteristics such as climate, catchment size, river discharge, soil types, and permafrost distribution. The large rivers (Lena, Yenisei), with a greater proportion of permafrost, exported the greatest amount of carbon. The Kolyma and Mackenzie exported the smallest amount of carbon annually, however, the discharge weighted mean DOC concentration was almost 2-fold higher in the Kolyma, again, indicating the importance of continuous permafrost. The quality and quantity of DOM mobilized into Arctic rivers appears to depend on the relative importance of surface run-off and extent of soil percolation. The relative importance of these is ultimately determined by watershed characteristics.
Author : Shatrughan Singh
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (556 download)
Download or read book Seasonal Variability in Absorption and Fluorescence Properties of Chromophoric Dissolved Organic Matter in the Barataria Basin, Louisiana, USA written by Shatrughan Singh and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 804 pages
Book Rating : 4.3/5 (91 download)
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher : Academic Press
ISBN 13 : 0080878857
Total Pages : 4604 pages
Book Rating : 4.0/5 (88 download)
Download or read book Treatise on Estuarine and Coastal Science written by and published by Academic Press. This book was released on 2012-03-06 with total page 4604 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of estuaries and coasts has seen enormous growth in recent years, since changes in these areas have a large effect on the food chain, as well as on the physics and chemistry of the ocean. As the coasts and river banks around the world become more densely populated, the pressure on these ecosystems intensifies, putting a new focus on environmental, socio-economic and policy issues. Written by a team of international expert scientists, under the guidance of Chief Editors Eric Wolanski and Donald McClusky, the Treatise on Estuarine and Coastal Science, Ten Volume Set examines topics in depth, and aims to provide a comprehensive scientific resource for all professionals and students in the area of estuarine and coastal science Most up-to-date reference for system-based coastal and estuarine science and management, from the inland watershed to the ocean shelf Chief editors have assembled a world-class team of volume editors and contributing authors Approach focuses on the physical, biological, chemistry, ecosystem, human, ecological and economics processes, to show how to best use multidisciplinary science to ensure earth's sustainability Provides a comprehensive scientific resource for all professionals and students in the area of estuarine and coastal science Features up-to-date chapters covering a full range of topics
Author : Jennifer Louise Dixon
Publisher :
ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.:/5 (885 download)
Download or read book Seasonal Changes in Estuarine Dissolved Organic Matter Due to Variations in Discharge, Flushing Times and Wind-driven Mixing Events written by Jennifer Louise Dixon and published by . This book was released on 2014 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Raymond E. Wildung
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.3/5 (91 download)
Download or read book Seasonal Changes in Particle Size Distribution, Composition, and Strontium Exchange Capacity of Particulate Matter Suspended in the Columbia River written by Raymond E. Wildung and published by . This book was released on 1972 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 170 pages
Book Rating : 4.3/5 (121 download)
Download or read book Water Quality of the Lower Columbia River Basin written by and published by . This book was released on 1996 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : E.M. Thurman
Publisher : Springer Science & Business Media
ISBN 13 : 9789024731435
Total Pages : 524 pages
Book Rating : 4.7/5 (314 download)
Download or read book Organic geochemistry of natural waters written by E.M. Thurman and published by Springer Science & Business Media. This book was released on 1985-04-30 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written as a reference on organic substances in natural waters and as a supplementary text for graduate students in water chemistry. The chapters address five topics: amount, origin, nature, geochemistry, and characterization of organic carbon. Of these topics, the main themes are the amount and nature of dissolved organic carbon in natural waters (mainly fresh water, although seawater is briefly discussed). It is hoped that the reader is familiar with organic chemistry, but it is not necessary. The first part of the book is a general overview of the amount and general nature of dissolved organic carbon. Over the past 10 years there has been an exponential increase in knowledge on organic substances in water, which is the result of money directed toward the research of organic compounds, of new methods of analysis (such as gas chromatography and mass spectrometry), and most importantly, the result of more people working in this field. Because of this exponential increase in knowledge, there is a need to pull together and summarize the data that has accumulated from many disciplines over the last decade.
Author : Geological Survey (U.S.)
Publisher :
ISBN 13 :
Total Pages : 346 pages
Book Rating : 4.F/5 ( download)
Download or read book Geological Survey Professional Paper written by Geological Survey (U.S.) and published by . This book was released on 1970 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jinping Xue
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Download or read book Variations in Size and Optical Properties of Dissolved Organic Matter During Mixing at Large River Confluences written by Jinping Xue and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The functionality of dissolved organic matter (DOM) in natural waters depends on its size and composition. Identifying the sources and associated properties of DOM is vital to understand its effects on downstream ecosystems. River mixing has great potential to alter DOM quality, but its role in large boreal river confluences remains largely unknown, which limits our ability to realize the exact magnitude and composition of DOM exported to the ocean. Using asymmetrical flow field-flow fractionation (AF4) with offline excitation emission matrices (EEMs) measurements and parallel factor (PARAFAC) analysis, we found that inputs of DOM from the major tributaries shifted DOM quality in a typical large boreal river, namely, the lower Athabasca River (LAR). Flowing downstream, DOM tended to be higher in concentrations of dissolved organic carbon (DOC) and degrees of humification and aromaticity. Seasonal variations of DOM as a result of spring freshet were observed, during which times DOM tended to be higher in molecular mass (e.g., size) and richer in protein-like (i.e., tryptophan-like) relative to humic-like components. Source discrimination of DOM was more apparent under base flow conditions compared with the snowmelt period. In addition, conservative mixing behaviors of DOM at river confluences were observed. Contrasting mixing patterns among mixing zones suggest that both hydrological conditions and river geomorphology affect mixing patterns of DOM between the LAR and its tributaries. Our results demonstrate that DOM could be used as a quasi-conservative tracer during mixing at large river confluences. Findings from this study will enhance our ability to determine sources of DOM and to distinguish trends of mixing between the mainstem and the tributaries for DOM-associated trace elements in the boreal zone.
Author : Martha Mason Griffith
Publisher :
ISBN 13 :
Total Pages : 214 pages
Book Rating : 4.:/5 (31 download)
Download or read book Seasonal and Spatial Variations in Dissolved Organic Matter Bioavailability and Nutrient Yields in Agricultural Streams written by Martha Mason Griffith and published by . This book was released on 2008 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 400 pages
Book Rating : 4.:/5 (319 download)
Download or read book Geological Survey Professional Paper written by and published by . This book was released on 1973 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sue A. Ferguson
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (319 download)
Download or read book Climatology of the Interior Columbia River Basin written by Sue A. Ferguson and published by . This book was released on 1999 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 1022 pages
Book Rating : 4.3/5 (91 download)
Download or read book U.S. Geological Survey Professional Paper written by and published by . This book was released on 1964 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. David Allan
Publisher : Springer Science & Business Media
ISBN 13 : 1402055838
Total Pages : 444 pages
Book Rating : 4.4/5 (2 download)
Download or read book Stream Ecology written by J. David Allan and published by Springer Science & Business Media. This book was released on 2007-08-17 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: A hugely important text for advanced undergraduates as well as graduates with an interest in stream and river ecology, this second, updated edition is designed to serve as a textbook as well as a working reference for specialists in stream ecology and related fields. The book presents vital new findings on human impacts, and new work in pollution control, flow management, restoration and conservation planning that point to practical solutions. All told, the book is expanded in length by some twenty-five percent, and includes hundreds of figures, most of them new.
