‘Calving laws’, ‘sliding laws’ and the stability of tidewater glaciers
نویسندگان
چکیده
منابع مشابه
Calving rates at tidewater glaciers vary strongly with ocean temperature
Rates of ice mass loss at the calving margins of tidewater glaciers (frontal ablation rates) are a key uncertainty in sea level rise projections. Measurements are difficult because mass lost is replaced by ice flow at variable rates, and frontal ablation incorporates sub-aerial calving, and submarine melt and calving. Here we derive frontal ablation rates for three dynamically contrasting glaci...
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Vallot, D. 2017. Modelling calving and sliding of Svalbard outlet glaciers. Spatio-temporal changes and interactions. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1606. 82 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-513-0170-9. Future sea level rise associated to global warming is one of the greatest societal and environmental ...
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Determining a calving law valid for all glaciological and environmental regimes has proven to be a difficult problem in glaciology. For this reason, most models of the calving process are semiempirical, with little connection to the underlying fracture processes. In this study, I introduce methods rooted in statistical physics to show how calving laws, valid for any glaciological domain, can em...
متن کاملCalving processes and the dynamics of calving glaciers
Calving of icebergs is an important component of mass loss from the polar ice sheets and glaciers in many parts of the world. Calving rates can increase dramatically in response to increases in velocity and/or retreat of the glaciermargin, with important implications for sea level change. Despite their importance, calving and related dynamic processes are poorly represented in the current gener...
متن کاملOn the Stability Functional for Conservation Laws
Let the smooth map f : Ω 7→ R define the strictly hyperbolic system of conservation laws ∂tu+ ∂xf(u) = 0 (1.1) where t > 0, x ∈ R and u ∈ Ω, with Ω ⊆ R being an open set. Most functional theoretic methods fail to tackle these equations, essentially due to the appearance of shock waves. Since 1965, the Glimm functional [13] has been a major tool in any existence proof for (1.1) and related equat...
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ژورنال
عنوان ژورنال: Annals of Glaciology
سال: 2007
ISSN: 0260-3055,1727-5644
DOI: 10.3189/172756407782871161