Simulating CO<Subscript>2</Subscript> transport into the ocean from a CO<Subscript>2</Subscript> lake at the seafloor using a <Emphasis Type="Italic">z</Emphasis>- and a <Emphasis Type="Italic">σ</Emphasis>-coordinate model     

Kristin Rygg  Lars Inge Enstad  Guttorm Alendal 《Ocean Dynamics》2009,59(6):795-808

The ocean takes up approximately 2 GT carbon per year due to the enhanced CO₂ concentrations in the atmosphere. Several options have been suggested in order to reduce the emissions of CO₂ into the atmosphere, and among these are CO₂ storage in the deep ocean. Topographic effects of dissolution and transport from a CO₂ lake located at 3,000-m depth have been studied using the z-coordinate model Massachusetts Institute of Technology general circulation model (MITgcm) and the σ-coordinate model Bergen ocean model (BOM). Both models have been coupled with the general ocean turbulence model (GOTM) in order to account for vertical subgrid processes. The chosen vertical turbulence mixing scheme includes the damping effect from stable stratification on the turbulence intensity. Three different topographic scenarios are presented: a flat bottom and the CO₂ lake placed within a trench with depths of 10 and 20 m. The flat case scenario gives good correlation with previous numerical studies of dissolution from a CO₂ lake. When topography is introduced, it is shown that the z-coordinate model and the σ-coordinate model give different circulation patterns in the trench. This leads to different dissolution rates, 0.1 μmol cm^− 2 s^− 1 for the scenario of a 20-m-deep trench using BOM and 0.005–0.02 μmol cm^− 2 s^− 1 for the same scenario using the MITgcm. The study is also relevant for leakages of CO₂ stored in geological formations and to the ocean.  相似文献   

The extent of the Late Weichselian ice sheet in the southeastern Barents Sea     

Valery Gataullin  Jan Mangerud  John Inge Svendsen   《Global and Planetary Change》2001,31(1-4)

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Reply to Preusser et al. on Frechen et al. “Late Pleistocene fluvial dynamics in the Hochrhein Valley in the upper Rhine Graben: chronological frame”     

Manfred Frechen  Dietrich Ellwanger  Matthias Hinderer  J?rg L?mmermann-Barthel  Inge Neeb  Astrid Techmer 《International Journal of Earth Sciences》2012,101(1):389-392

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Memory-Efficient Categorical Multi-point Statistics Algorithms Based on Compact Search Trees   总被引：1，自引：1，他引：0  

Tuanfeng Zhang  Stein Inge Pedersen  Christen Knudby  David McCormick 《Mathematical Geosciences》2012,44(7):863-879

Multi-point statistics (MPS) has emerged as an advanced geomodeling approach. A practical MPS algorithm named snesim (simple normal equations simulation), which uses categorical-variable training images, was proposed in 2001. The snesim algorithm generates a search tree to store the occurrence statistics of all patterns in the training image within a given set of search templates before the simulation proceeds. The snesim search tree concept makes MPS simulation central processing unit efficient but consumes large amounts of memory, particularly when three-dimensional training images contain complex patterns and when a large search template is required to ensure optimal reproduction of the image patterns. To crack the memory-restriction bottleneck, we have developed a compact search tree that contains the same information but reduces memory cost by one order of magnitude. Furthermore, the compact structure also accelerates MPS simulation significantly. Such remarkable improvement makes MPS a more practical tool to use in building the large and complex three-dimensional facies models required in the oil and gas industry.  相似文献   

GIS-based modeling of rainfall-induced landslides using data mining-based functional trees classifier with AdaBoost,Bagging, and MultiBoost ensemble frameworks     

Dieu Tien Bui  Tien-Chung Ho  Biswajeet Pradhan  Binh-Thai Pham  Viet-Ha Nhu  Inge Revhaug 《Environmental Earth Sciences》2016,75(14):1101

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