Author: J. SnöälvPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Particulate Organic Carbon Dynamics Along the Land-ocean Aquatic Continuum
Author: J. SnöälvCongo Basin Hydrology, Climate, and Biogeochemistry
Author: Raphael M. TshimangaPublisher: John Wiley & Sons
ISBN: 1119656974
Category : Science
Languages : en
Pages : 596
Book Description
New scientific discoveries in the Congo Basin as a result of international collaborations The Congo is the world's second largest river basin and home to 120 million people. Understanding the cycling of water, sediments, and nutrients is important as the region faces climatic and anthropogenic change. Congo Basin Hydrology, Climate, and Biogeochemistry: A Foundation for the Future explores variations in and influences on rainfall, hydrology and hydraulics, and sediment and carbon dynamics. It features contributions from experts in the region and their international collaborators. Volume highlights include: New in-situ and remotely sensed measurements and model results Use of historic data to assess precipitation and hydrologic changes Exploration of water exchange between wetlands and rivers Biogeochemical processes in the Congo's forests and wetlands A scientific foundation for hydrologic resource management in the region Studies from different parts of the Congo river and its adjoining basins This book is available in English and French. The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals. Find out more about this book in this short video and this article.
Using Optical Tools to Improve Understanding of Dissolved Organic Carbon Fluxes Along the Land-ocean Aquatic Continuum
Author: Stacey Louise FelgateOcean Dynamics and the Carbon Cycle
Author: Richard G. WilliamsPublisher: Cambridge University Press
ISBN: 1139496778
Category : Science
Languages : en
Pages : 433
Book Description
This textbook for advanced undergraduate and graduate students presents a multidisciplinary approach to understanding ocean circulation and how it drives and controls marine biogeochemistry and biological productivity at a global scale. Background chapters on ocean physics, chemistry and biology provide students with the tools to examine the range of large-scale physical and dynamic phenomena that control the ocean carbon cycle and its interaction with the atmosphere. Throughout the text observational data is integrated with basic physical theory to address cutting-edge research questions in ocean biogeochemistry. Simple theoretical models, data plots and schematic illustrations summarise key results and connect the physical theory to real observations. Advanced mathematics is provided in boxes and appendices where it can be drawn on to assist with the worked examples and homework exercises available online. Further reading lists for each chapter and a comprehensive glossary provide students and instructors with a complete learning package.
Carbon Cycling Along the James River Continuum
Author: Timothy B. JonesPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Fluvial systems act as conduits for terrestrial carbon transport to coastal oceans. However, riverine systems not only transport allochthonous carbon, they transform and store carbon in many different ways. The different mechanisms of transformation and storage need to be considered for fluvial systems in order to accurately account for modifications to the carbon pool when developing carbon budgets. Of interest was to investigate the carbon dynamics in the James River, in Virginia, from headwaters to the tidal fresh estuary to gain a better understanding of carbon dynamics along the continuum. Sites along the river continuum were sampled for dissolved organic carbon (DOC) concentrations and used in bioassays to determine degradation dynamics along the continuum, radiocarbon analysis was used to determine the age of the DOC and POC pool available to bacteria, impoundment effect on carbon dynamics was investigated in the Appomattox River, a tributary to the James, and landcover data was used to investigate the effects of land change on aquatic carbon dynamics. Bacterial total consumption and rates were found to be highest in the headwater streams, where carbon sources have yet to undergo degradation, downstream sites consumption remained steady up to the tidal fresh estuary where degradation was minimal. Radiocarbon analyses showed older POC (5460 years old) at a site in the middle of the continuum where anthropogenic effects may have been the cause. Samples from the impoundment of the Appomattox River to form the Lake Chesdin Reservoir provided different results from the mainstem James, as DOC concentrations fluctuated throughout the continuum and the impoundment allowed for increased storage of allochthonous carbon and production of autochthonous carbon, altering the flux of carbon and nutrients downstream. As the majority of the James River watershed is forested, the increase in anthropogenic modifications downstream showed an opposite trend with the decrease in bacterial consumption further downstream, suggesting possible anthropogenic influence on bioavailability of DOC to bacteria. Rivers were once thought of as only transporting carbon downstream, however what enters rivers in the headwaters is not always the same that concludes its journey in the ocean. Thus, the many mechanisms of transformation and storage need to be assessed when accurately constructing carbon budgets. In an Appendix, I detail modifications to the Respiratory Carbon Recovery System (ReCreS) which helped streamline sample incubation and collection. A new incubation chamber was devised with a port for a pH probe and a flat bottom for the introduction of a magnetic stir bar to reach equilibrium faster. Additionally, a new kettle lid design contained a port for a pressure gauge to prevent over pressurization during sparging. An added inline Nafion Dryer removed moisture from the gas stream before entering the vacuum line. Finally, the line was connected directly to a vacuum pump to streamline the sample collection process, removing the need to take the trapped CO2 elsewhere for processing and providing immediate recovery results.
Modeling of Particulate Organic Carbon Fluxes in the Ocean with Mineral Ballasting
Author: Matthew T. HowardMarine Carbon Biogeochemistry
Author: Jack J. MiddelburgPublisher: Springer
ISBN: 3030108228
Category : Science
Languages : en
Pages : 118
Book Description
This open access book discusses biogeochemical processes relevant to carbon and aims to provide readers, graduate students and researchers, with insight into the functioning of marine ecosystems. A carbon centric approach has been adopted, but other elements are included where relevant or needed. The book focuses on concepts and quantitative understanding of primary production, organic matter mineralization and sediment biogeochemistry. The impact of biogeochemical processes on inorganic carbon dynamics and organic matter transformation are also discussed.
Carbon dynamics in freshwater, coastal and oceanic ecosystems in response to the SDG goals
Author: Jeng-Wei TsaiPublisher: Frontiers Media SA
ISBN: 2832527264
Category : Science
Languages : en
Pages : 158
Book Description
Carbon and Nutrient Fluxes in Continental Margins
Author: Kon-Kee LiuPublisher: Springer Science & Business Media
ISBN: 3540927352
Category : Science
Languages : en
Pages : 757
Book Description
This book is a product of the joint JGOFS (Joint Global Ocean Flux Study)/LOICZ (Land–Ocean Interactions in the Coastal Zone) Continental Margins Task Team which was established to facilitate continental margins research in the two projects. It contains signi cant information on the physical, biogeochemical, and ecosystems of continental margins nationally and regionally and provides a very valuable synthesis of this information and the physical, biogeochemical and ecosystem processes which occur on continental margins. The publication of this book is timely as it provides a very strong foundation for the development of the joint IMBER (Integrated Marine Biogeochemistry and Ecosystems Research)/LOICZ Science Plan and Implemen- tion Strategy for biogeochemical and ecosystems research in the continental margins and the impacts of global change on these systems. This initiative will move forward integrated biogeochemical and ecosystems research in the continental margins. We thank all the contributors to this volume and especially Kon-Kee Liu who has dedicated a great deal of time to ensuring a high-quality book is published. IMBER Scienti c Steering Committee Julie Hall LOICZ Scienti c Steering Committee Jozef Pacyna v 1 Preface In general, interfaces between the Earth’s larger material reservoirs (i. e. , the land, atmosphere, ocean, and sediments) are important in the control of the biogeoche- cal dynamics and cycling of the major bio-essential elements, including carbon (C), nitrogen (N), phosphorus (P), sulfur (S), and silicon (Si), found in organic matter and the inorganic skeletons, shells, and tests of benthic and marine organisms.
Ocean Biogeochemistry
Author: Michael J.R. FashamPublisher: Springer Science & Business Media
ISBN: 3642558445
Category : Science
Languages : en
Pages : 324
Book Description
Oceans account for 50% of the anthropogenic CO2 released into the atmosphere. During the past 15 years an international programme, the Joint Global Ocean Flux Study (JGOFS), has been studying the ocean carbon cycle to quantify and model the biological and physical processes whereby CO2 is pumped from the ocean's surface to the depths of the ocean, where it can remain for hundreds of years. This project is one of the largest multi-disciplinary studies of the oceans ever carried out and this book synthesises the results. It covers all aspects of the topic ranging from air-sea exchange with CO2, the role of physical mixing, the uptake of CO2 by marine algae, the fluxes of carbon and nitrogen through the marine food chain to the subsequent export of carbon to the depths of the ocean. Special emphasis is laid on predicting future climatic change.