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Insights and Issues with Simulating Terrestrial DOC Loading of Arctic River Networks

2013
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Release : 2013
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Book Synopsis Insights and Issues with Simulating Terrestrial DOC Loading of Arctic River Networks by : David W. Kicklighter

Download or read book Insights and Issues with Simulating Terrestrial DOC Loading of Arctic River Networks written by David W. Kicklighter. This book was released on 2013. Available in PDF, EPUB and Kindle. Book excerpt: Terrestrial carbon dynamics influence the contribution of dissolved organic carbon (DOC) to river networks in addition to hydrology. In this study, we use a biogeochemical process model to simulate the lateral transfer of DOC from land to the Arctic Ocean via riverine transport. We estimate that, over the 20th century, the pan-Arctic watershed has contributed, on average, 32 Tg C/yr of DOC to river networks emptying into the Arctic Ocean with most of the DOC coming from the extensive area of boreal deciduous needle-leaved forests and forested wetlands in Eurasian watersheds. We also estimate that the rate of terrestrial DOC loading has been increasing by 0.037 Tg C/yr2 over the 20th century primarily as a result of climate-induced increases in water yield. These increases have been offset by decreases in terrestrial DOC loading caused by wildfires. Other environmental factors (CO2 fertilization, ozone pollution, atmospheric nitrogen deposition, timber harvest, agriculture) are estimated to have relatively small effects on terrestrial DOC loading to Arctic rivers. The effects of the various environmental factors on terrestrial carbon dynamics have both offset and enhanced concurrent effects on hydrology to influence terrestrial DOC loading and may be changing the relative importance of terrestrial carbon dynamics on this carbon flux. Improvements in simulating terrestrial DOC loading to pan-Arctic rivers in the future will require better information on the production and consumption of DOC within the soil profile, the transfer of DOC from land to headwater streams, the spatial distribution of precipitation and its temporal trends, carbon dynamics of larch-dominated ecosystems in eastern Siberia, and the role of industrial organic effluents on carbon budgets of rivers in western Russia.

Arctic Hydrology, Permafrost and Ecosystems

2020-08-28 Science
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Release : 2020-08-28
Genre : Science
Kind : eBook
Book Rating : 303/5 ( reviews)

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Book Synopsis Arctic Hydrology, Permafrost and Ecosystems by : Daqing Yang

Download or read book Arctic Hydrology, Permafrost and Ecosystems written by Daqing Yang. This book was released on 2020-08-28. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive, up-to-date assessment of the key terrestrial components of the Arctic system, i.e., its hydrology, permafrost, and ecology, drawing on the latest research results from across the circumpolar regions. The Arctic is an integrated system, the elements of which are closely linked by the atmosphere, ocean, and land. Using an integrated system approach, the book’s 30 chapters, written by a diverse team of leading scholars, carefully examine Arctic climate variability/change, large river hydrology, lakes and wetlands, snow cover and ice processes, permafrost characteristics, vegetation/landscape changes, and the future trajectory of Arctic system evolution. The discussions cover the fundamental features of and processes in the Arctic system, with a special focus on critical knowledge gaps, i.e., the interactions and feedbacks between water, permafrost, and ecosystem, such as snow pack and permafrost changes and their impacts on basin hydrology and ecology, river flow, geochemistry, and energy fluxes to the Arctic Ocean, and the structure and function of the Arctic ecosystem in response to past/future changes in climate, hydrology, and permafrost conditions. Given its scope, the book offers a valuable resource for researchers, graduate students, environmentalists, managers, and administrators who are concerned with the northern environment and resources.

Observations, Interactions, and Implications of Increasingly Dynamic Permafrost Coastal Systems

2022-04-28 Science
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Release : 2022-04-28
Genre : Science
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Book Rating : 243/5 ( reviews)

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Book Synopsis Observations, Interactions, and Implications of Increasingly Dynamic Permafrost Coastal Systems by : Benjamin M. Jones

Download or read book Observations, Interactions, and Implications of Increasingly Dynamic Permafrost Coastal Systems written by Benjamin M. Jones. This book was released on 2022-04-28. Available in PDF, EPUB and Kindle. Book excerpt:

The New Arctic

2015-06-11 Science
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Release : 2015-06-11
Genre : Science
Kind : eBook
Book Rating : 021/5 ( reviews)

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Book Synopsis The New Arctic by : Birgitta Evengård

Download or read book The New Arctic written by Birgitta Evengård. This book was released on 2015-06-11. Available in PDF, EPUB and Kindle. Book excerpt: In the late 18th century explorers and scientists started venturing into the Arctic in a heroic and sometimes deadly effort to understand and unveil the secrets of the unforgiving and mysterious polar region of the high north. Despite that the Arctic was already populated mattered less for the first wave of polar researchers and explorations who nevertheless, brought back valuable knowledge. Today the focus in Arctic science and discourse has changed to one which includes the peoples and societies, and their interaction with the world beyond. The image of a static Arctic - heralded first by explorers - prevailed for a long time, but today the eyes of the World see the Arctic very differently. Few, if any, other places on Earth are currently experiencing the kind of dramatic change witnessed in the Arctic. According to model forecasts, these changes are likely to have profound implications on biophysical and human systems, and will accelerate in the decades to come. “The New Arctic” highlights how, and in what parts, the natural and political system is being transformed. We’re talking about a region where demography, culture, and political and economic systems are increasingly diverse, although many common interests and aspects remain; and with the new Arctic now firmly placed in a global context. Settlements range from small, predominantly indigenous communities, to large industrial cities, and all have a link to the surrounding environment, be it glaciers or vegetation or the ocean itself. “The New Arctic” contributes to our further understanding of the changing Arctic. It offers a range of perspectives, which reflect the deep insight of a variety of scientific scholars across many disciplines bringing a wide range of expertise. The book speaks to a broad audience, including policy-makers, students and scientific colleagues.

Balancing Greenhouse Gas Budgets

2022-05-05 Science
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Release : 2022-05-05
Genre : Science
Kind : eBook
Book Rating : 531/5 ( reviews)

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Book Synopsis Balancing Greenhouse Gas Budgets by : Benjamin Poulter

Download or read book Balancing Greenhouse Gas Budgets written by Benjamin Poulter. This book was released on 2022-05-05. Available in PDF, EPUB and Kindle. Book excerpt: Balancing Greenhouse Gas Budgets: Accounting for Natural and Anthropogenic Flows of CO2 and other Trace Gases provides a synthesis of greenhouse gas budgeting activities across the world. Organized in four sections, including background, methods, case studies and opportunities, it is an interdisciplinary book covering both science and policy. All environments are covered, from terrestrial to ocean, along with atmospheric processes using models, inventories and observations to give a complete overview of greenhouse gas accounting. Perspectives presented give readers the tools necessary to understand budget activities, think critically, and use the framework to carry out initiatives. Written by a combination of experts across career stages, presenting an integrated perspective for graduate students and professionals alike Includes sections authored by those involved in both early and later IPCC assessments Provides an interdisciplinary resource that spans many topics and methodologies in oceanic, land and atmospheric processes

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