PPT-Progress in climate-glacier-ice sheet

modelling Jeremy Fyke LANL Bill Lipscomb LANL Bill Sacks NCAR Valentina Radic UBC Canada Synopsis RCP85 Greenland Ice Sheet GIS sea level rise contribution predictions Glacier model initialization on RASM model grid. 00 2800 3800 6500 11500 16500 SPECIALTY 2200 3400 4800 8000 13500 18000 SERVES 2x2 2025 4050 80100 SERVES 2x3 1518 30 35 6070 PLAIN 1600 2000 3600 4800 CLASSICS 6000 10000 20000 CLASSICS ONLY 3600 7000 13000 FLAVORED 2000 2600 4000 5600 SPECIALTY 700 Glacial Erosion. As glaciers travel over land, glacial ice can erode the underlying bedrock.. This erosion can happen by:. Plucking. A. brasion. Plucking. This occurs when melt water at the base of the glacier freezes in cracks and fractures the underlying bedrock.. What are the processes of glacial erosion?. They erode by two main processes. As a glacier moves down a valley, it creates pressure on the land which creates heat. This melts part of the glacier. This water runs into small cracks, it the refreezes as it gets colder (freeze-thaw). Chapter 7.1. At one time nearly 30% of the earth’s surface was covered in ice. . . This . period of time was referred to . as the . ice age. .. Today. , only . 10% of the earth’s surface is covered in ice. Deposition:. AIM:. Erosional and Depositional systems. Do Now: In your notebooks…. 1) Define the two terms below in your own words.. 2) Explain how the two terms work together.. The movement/transport of material from one place to another. Erosive forces . Glacier. persistent . body of dense ice that is constantly moving under its own . weight.. It . forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many . Prairie School. Earth Science. Glaciers: Moving Ice. When you take a handful of snow and squeeze it, you are creating a product that is similar to that of glaciers. . Glacier: fast moving, large mass of ice. . 1 November 2010. Reference Outline. Glacier definition. Zones and crevasses. Features and hazards. Snowbridges. Climates. Rope team set up. Roped Travel. Routefinding. Glaciers. Glaciers. Form in areas that receive more snow than can melt in a given year. Do Now:. The material seen below was left behind by a retreating glacier. Describe the sediments seen in the picture. . . Tasman Glacial Moraine, New Zealand. Formed from the accumulation of ice and snow over thousands of years. . What would you say was the extend of the ice cover?. 100%? . 50%? . A third? . 2/3?. KEY IDEAS & QUESTIONS. What is a glacier?. How glaciers shape the landscape; processes of freeze-thaw, plucking and abrasion.. Have you ever wondered?. Why are there so many terms for ice?. Why can you walk on the North Pole. ?. Will I be able to walk on ice in the future?. Why should I care about such a cold place?. How does climate in one region of the world effect climate in another?. Agent . of . weathering, erosion, and deposition . – acquire, transport and deposit sediment. Occupy ~10% of land area. “Interrupts” hydrologic cycle by “locking up” water. Glacier. GLACIERS. Taku Glacier 2 Calculate the gradient of the Taku Glacier from 1000 ft It originates on land from the accumulation, compaction, and . recrystallization. of snow. .. A glacier appears to be motionless, but glaciers move very slowly.. Glaciers are dynamic weathering . and erosional .