Author: Ludwig Nikolaus BraunPublisher:
ISBN:
Category : Mass budget (Geophysics)
Languages : en
Pages : 11
Book Description
Changes in Snow and Ice Storage-- Measurement and Simulation
Author: Ludwig Nikolaus BraunPublisher:
ISBN:
Category : Mass budget (Geophysics)
Languages : en
Pages : 11
Book Description
Indirect Ice Storage System Simulation
Author: Richard Karl StrandLong-term Energy-balance Modeling of Interannual Snow and Ice in Wyoming Using the Dynamic Equilibrium Concept
Author: Ryan J. JohnsonPublisher:
ISBN: 9781339054858
Category : Ice
Languages : en
Pages : 106
Book Description
Many snow models in the field of hydrologic engineering do not incorporate the long-term effects of the interannual snow storage such as glaciers because glacier dynamics have a much longer timescale than river flow and seasonal snowmelt. This study proposes an appropriate treatment for inland glaciers as systems in dynamic equilibrium that remain constant under a static climate condition. This new method considers the vertical movement of snow/ice from high elevation areas to valleys as the equilibrating factor of the glacier system. The vertical movement of snow/ice occurs by means of wind re-distribution, avalanches, and glaciation. This paper introduces and discusses the physically-based modeling of such a dynamic equilibrium snow system for long-term snow simulation at a regional scale. We apply the regional snow model (RegSnow) to a domain containing the entire state of Wyoming and couple the model to the Weather Research and Forecasting (WRF) model to compute the snow surface energy-balance. RegSnow predicted that 82.2% of interannual snow and ice storage in Wyoming may disappear by 2100 using temperature increases projected by CMIP5 GCMs, under the RCP4.5 emission scenario.
Field, Laboratory, and Modeling Studies of Water Infiltration and Runoff in Subfreezing Snow on Regional Scales to Estimate Future Greenhouse-induced Changes in Sea-level. Final Report
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
The current DOE-supported research program (Reduce Uncertainty in Future Sea-Level Change Due to Ice Wastage) addressed the question of how the refreezing of meltwater in cold snow affects sea-level changes in a future changing climate. The continuation of that research, proposed here, takes an additional new approach by focusing on processes which can be defined and characterized by measurements on regional scales. This new emphasis is intended to be directly applicable to a large-scale analysis from which runoff forecasts (and consequent sea level change) from the entire arctic region can be made. The research proposed here addresses the problem of forecasting future sea-level change due to greenhouse-induced changes in runoff from polar glaciers and ice caps. The objectives of this work are (1) to observe in the field the processes of infiltration and refreezing which lead to the formation of impermeable firn layers; (2) to reproduce these observed processes in the laboratory to confirm and further quantify their understanding; (3) to develop and calibrate a regional scale numerical model which can simulate these processes, based on measured parameters and driven by boundary conditions determined by climate; and (4) to apply this model to predict the development of impermeable firn (and consequent runoff and discharge to the ocean) in response to predicted future climate change.
Active Subspaces
Author: Paul G. ConstantinePublisher: SIAM
ISBN: 1611973864
Category : Computers
Languages : en
Pages : 105
Book Description
Scientists and engineers use computer simulations to study relationships between a model's input parameters and its outputs. However, thorough parameter studies are challenging, if not impossible, when the simulation is expensive and the model has several inputs. To enable studies in these instances, the engineer may attempt to reduce the dimension of the model's input parameter space. Active subspaces are an emerging set of dimension reduction tools that identify important directions in the parameter space. This book describes techniques for discovering a model's active subspace and proposes methods for exploiting the reduced dimension to enable otherwise infeasible parameter studies. Readers will find new ideas for dimension reduction, easy-to-implement algorithms, and several examples of active subspaces in action.
Arctic Hydrology, Permafrost and Ecosystems
Author: Daqing YangPublisher: Springer Nature
ISBN: 3030509303
Category : Science
Languages : en
Pages : 914
Book Description
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.
Proceedings of the Fourth Atmospheric Radiation Measurement (ARM) Science Team Meeting
Author: Publisher:
ISBN:
Category : Atmospheric radiation
Languages : en
Pages : 428
Book Description
Bibliography on Cold Regions Science and Technology
Author: SIPRE Report
Author: Proceedings of the U. S. Geological Survey Global Change Research Forum
Author: John A. KelmelisPublisher: DIANE Publishing
ISBN: 9780788102998
Category : Science
Languages : en
Pages : 140
Book Description
The proceedings of an interdisciplinary meeting to review the diverse topics represented in global change research, held March 18-20, 1991, in Herndon, VA. Covers: climate, hydrology, precipitation, desert processes, energy, permafrost, & much more. Covers all aspects of the subject in over 100 presentations & poster sessions. Comprehensive!!