Ice is Ice---isn’t it? Why are glaciers and ice sheets important? Large volume of fresh water is stored in ice masses Change in ice volume affects global.

Slides:

Advertisements

Similar presentations

What? Remote, actively researched, monitored, measured, has a huge impact on global climate and is relatively cool?

Advertisements

Glaciers Carve Land and Move Sediments

Glaciers Chapter 15.1.

Unit 1: Water Systems on Earth Chapter 1

News stories often link climate change to rising sea levels. Throughout Earth’s history sea level has constantly changed and, indeed, it is these very.

COLUMBIA ICEFIELD PARKS CANADA PHOTO Earth’s Frozen Water.

Chapter 17 Review.

Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Outline GLACIERS 1)Types of glaciers 2)Glacier formation, movement 3)Glacial erosion 4)Glacial landforms and deposits 5)Side effects 6)Ice ages.

Topic 2 – Earth’s Frozen Water What is a Glacier? Large bodies of moving mass of ice and snow are called glaciers. An ‘ Ice Cap ’ is a glacier that forms.

Chapter 7: Erosion and Deposition

Formation  Snow accumulation  More winter snowfall than summer melt  Glacier formation is similar to sedimentary rock formation.

Unit 1: Water Systems on Earth

Unit 1: Water Systems on Earth Chapter 1

Topic 2: Frozen Water Grade 8 Science. Distribution of water on earth Groundwater = 0.63% Rivers/Lakes/Ponds = 0.02% Glaciers/Ice sheets = 2.15% Oceans.

Ch. 15 Glaciers.

GLACIER natural accumulation of land ice showing movement at some time great ice sheets have waxed and waned over the surface of the Earth causes for.

Chapter 7.1 Glaciers.

LEARNING GOALS 1. I AM LEARNING THE IMPACT OF HUMAN ACTIVITIES AND TECHNOLOGIES ON WATER RESOURCES 2. I AM INVESTIGATING THE FACTORS THAT AFFECT LOCAL.

Earth Science: 7.1A Glaciers. Glaciers  As recently as 15,000 years ago, up to 30 percent of earth’s land was covered by an glacial ice.  Earth was.

 A glacier is a thick mass of ice, composed of compacted and recrystallized snow that forms over thousands of years.  Glacier only flow or move over.

Glaciers Moving Ice Formation of Glaciers A glacier is defined as a mass of moving ice. A glacier is defined as a mass of moving ice. There are several.

Unit 7 - Ice Is Nice Glacier=pile of ice and snow that flows; Forms if snow exceeds melt enough to make a pile; Takes water (as ice) and sediment from.

Ch 15: p  Enormous masses of moving ice created by the accumulation and compaction of snow.  Powerful agents of erosion ~ have carved some.

Arctic and Antarctic Review Glacier Arctic Global WarmAntarctic Misc Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy.

Chapter 21: The Glacier Systems and the Ice Age Presentation.

Jeopardy Vocabulary Glaciers Arctic Antarctica Misc Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy.

Glacial Erosion and Deposition. Objectives Introduce glaciers as important agents of landscape formation, and discuss the different categories of glaciers.

Glaciers UNIT 5 STANDARDS: STATE OBJECTIVES: NCES 2.1.1, 2.1.3, LESSON 6.

Table of Contents Title: 8.3 Glaciers Page: 80 Date: 3/4/2013.

Chapter 18: Glaciers. Introduction Glacier: thick mass of ice that originates on land from the accumulations, compaction and recrystallization of snow.

Moving At A Glacial Pace How Glaciers Have Shaped Our World.

Glaciers and Erosion Chapter 7 Section 1.

Glacial Modification of Terrain

“Fast Times at Glacial High” ERIC MARCH

Sources of Fresh Water 1. Lakes, ponds and wetlands 2. Streams and rivers 3. Ground water 4. Glaciers 5. Drainage basins.

Glaciers & Erosion. Glaciers: What are they? very powerful agent of erosion mass of moving ice How are glaciers formed? when snow and ice accumulate to.

Glacial Processes. Snow metamorphosis Snow  Firm  Glacial Ice ~80 years in alpine glacier Denser.

Chapter 17 Glacial and Periglacial Processes and Landforms

Chapter 8 Erosional Forces Section 8-2 Glaciers Note Guide.

Unit 1: Water Systems on Earth

UNIT 5WEATHERING: (B) GLACIERS Glacier-large long-lasting mass of snow compacted & recrystallized, first into firn then glacial ice. Glaciers part of hydrosphere.

Glaciers. “ RIVERS OF ICE ” Mass movement of frozen ice on land Mass movement of frozen ice on land Form at high elevations or high altitude Form at high.

Lecture 10: Ice on Earth EarthsClimate_Web_Chapter.pdfEarthsClimate_Web_Chapter.pdf, p. 8, 27-30; Ch. 2, p. 21; Ch. 10, p I.Sea Ice II.Glacial.

Ice Loss Signs of Change. The Cryosphere  Earth has many frozen features including – sea, lake, and river ice; – snow cover; – glaciers, – ice caps;

D. Evan Stribling  a larger mass of compacted snow and ice that moves under the force of its own gravity (weight)  They erode in some places deposit.

Glaciers Landmarks of the Past. Glaciers: Large mass of ice, air, rock debris.Glaciers: Large mass of ice, air, rock debris. –At least partially formed.

Glaciers once covered most of the Earth –in total there have been up to 22 times when glaciers covered large areas of the Earth… including Alberta the.

Agenda Check In Review notes Glaciers WATER Who’d’a Thunk: Karaoke means “empty orchestra” in Japanese.

- In some places it is too cold for all the snow to melt - This snow begins to pile up - The weight of all the snow piling up causes the crystals to reform.

CH 7 Glaciers, Deserts, & Wind

Glaciers and Glaciation

Like running water, gravity is the driving force

GLACIERS CGF3M Nov. 5, 2013.

Unit 5: Gradational Processes Ms. Thind

Rocks & Landforms I-7 Notes

Grade 8 Science Unit 1: Water Systems on Earth Chapter 1.

Glacier Formation Glaciers are formed from layer after layer of compacted snow. As the snow compacts, it loses trapped air, becoming harder and more dense.

Earth Science Chapter 8 Section 3

Glaciers Glaciers are a part of both the hydrologic cycle and rock cycle Glacier – a thick mass of ice that forms over land from the compaction and recrystallization.

Presentation transcript:

Ice is Ice---isn’t it?

Why are glaciers and ice sheets important? Large volume of fresh water is stored in ice masses Change in ice volume affects global sea level Potential threat to coastal communities if they melt---15% of land is currently covered by glaciers

Glacier Impact our Life Studies of glacial ice cores tells us Earth’s history Helps the economy as tourist attractions Provides drinking water in spring melt

4 of 52 Living along coasts

How much ice is on Earth? Antarctica ~70 m sea-level equivalent Greenland ~7 m sea-level equivalent Mountain glaciers and small ice caps ~0.5 m sea-level equivalent Of 3% fresh water—77% is locked up in ice

Antarctica Most of the frozen water on the Earth is located in Antarctica

Greenland

Retreat of calving front of Jakobshavn Glacier

Distribution of mountain glaciers

Characteristics of glacial cycles Slow growth of ice sheet (~80 kyr) –results from variations in incoming solar radiation (Milankovitch cycles) –climate feedbacks amplify this forcing Rapid disintegration (~10 kyr) –feedbacks make ice sheet unstable –retreat not continuous: alternating rapid retreat and readvance

Types Alpine or Hanging Piedmont Ice Cap Polar

Measured in inches/day

Basal Glacial Ice is BLUE Due to pressure of multiple layers of snow, the oxygen is forced out so it absorbs all the spectrum of light –looks blue

Building an ice sheet

Continental ice sheet

Mountain glacier

Glacier Flow Ablation Flow Accumulation

Glacier Crevasse

Glacier in retreat—debris left behind creates a Moraine

Moulins Speeds up glacier flow In the Arctic with water at the bedrock lifting up and the Glacier slip sliding

Ice Sheets Act as dams to slow down the glacier flow In place “dam” break up » allows glaciers to flow faster

Equilibrium line

There may be both freezing and melting under ice shelves

Glacier Stream

Calving

Ice-sheet disintegration Surface melting –not fast enough to explain rapid disappearance of ice sheets Iceberg calving –proglacial lakes form, increasing iceberg production Ice streams –fast-moving “rivers” of ice drain interior rapidly

Lakes on top of Ice Sheet negative Albedo feedback loop

Moulins

Ice shelf Ice Shelf

Ice Cliff

Ice shelf breaking up

Glacial Movement

Ice Bergs and Sea Ice What’s the Difference? Let’s find out with a quick lab using water glasses, ice and a tray

Icebergs

Sea Ice

Northwest Passage was open for first time in 2007 with the melting of ice

Polar Bears need sea ice For feeding, resting