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

30
Snow line – where snow remains year round

  • date post

    21-Dec-2015

  • Category

    Documents

  • view

    219

  • download

    2

TAGS:

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

Page 1: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Snow line – where snow remains year round

Page 2: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.
Page 3: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Formation of Glacial Ice from Snow

Page 4: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Forming Glacial Ice

Initial Form

2 weeks

7 weeks

8 weeks

Snow Firn Glacial Ice

Page 5: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.
Page 6: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Glacier movement

• When glacier reaches critical mass (> 20m thick), flow occurs

Page 7: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.
Page 8: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Types of Glaciers

slip

Plasticdeformation

Ice Deformation with Slip

Page 9: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

What happens as ice melts

• Ice melt flows down to bedrock through crevasses and moulins (large tunnels)

• Water between bedrock and ice sheet acts as lubricant

• Allows ice sheet to move faster toward the coastline

Page 10: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

• Ice movement-rate increases from~30 cm per day in winter to ~40 cm per day in the summer

Page 11: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Terminus

Page 12: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Advance & Retreat: Moraines

Page 13: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Alpine Moraines and Till

Page 14: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Moraine Types

Page 15: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Anatomy of a Glacier

Page 16: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.
Page 17: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Piedmont glacier

Page 18: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Types of Glaciers – Piedmont & Tidewater Piedmont: Originally confined alpine, spread at foot of mountains

Calving

Page 19: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Different kinds of glaciers

Page 20: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Ice extent Last Glacial Maximum (21,000 yr BP)

Page 21: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Retreat of North American (Laurentide) ice sheet

Page 22: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.
Page 23: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.
Page 24: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.
Page 25: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Different kinds of glaciers

Page 26: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Ice cap and continental (ice sheet)

Sentinal Range, Antarctica

Page 27: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Ice cap (Vatnakjokull in Iceland)feeds “outlet glaciers”

Page 28: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Greenland Ice Sheet

Page 29: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Greenland

Page 30: Snow line – where snow remains year round. Formation of Glacial Ice from Snow.

Extended Science Benchmarks Comparison...Explain the surface features of the Great Lakes region using Ice Age theory. Key concepts: Glacial processes—climate change, snow changing

Extended Science Benchmarks Comparison...Explain the surface features of the Great Lakes region using Ice Age theory. Key concepts: Glacial processes—climate change, snow changing

The West Coast. Glacial Environment Cordilleran glaciation Cordilleran glaciation Glacial melt released water into oceans Glacial melt released water.

The West Coast. Glacial Environment Cordilleran glaciation Cordilleran glaciation Glacial melt released water into oceans Glacial melt released water.

A glacier forms when winter snowfall in an area exceeds summer melt and therefore accumulates year after year. Snow is compacted and converted to glacial.

A glacier forms when winter snowfall in an area exceeds summer melt and therefore accumulates year after year. Snow is compacted and converted to glacial.

Glacial Budgets. The glacial budget or net balance.

Glacial Budgets. The glacial budget or net balance.

Northeast Glacial Lakes Watershed Improvement and Protection … · 2019-06-03 · Lake Traverse lies in the main channel of what remains of the Glacial River Warren, the major outflow

Northeast Glacial Lakes Watershed Improvement and Protection … · 2019-06-03 · Lake Traverse lies in the main channel of what remains of the Glacial River Warren, the major outflow

Glacial Mass

Glacial Mass

Glacial Inception in North- The Role of Topography and Clouds ......Previous Work on Glacial Inception To obtain persistent snow cover growth, Otieno & Bromwich 2009 had to artificially

Glacial Inception in North- The Role of Topography and Clouds ......Previous Work on Glacial Inception To obtain persistent snow cover growth, Otieno & Bromwich 2009 had to artificially

Form in high mountains where snow accumulates to sufficient depths so that it is compressed, compacted and recrystallized. For this reason glacial.

Form in high mountains where snow accumulates to sufficient depths so that it is compressed, compacted and recrystallized. For this reason glacial.

Landforms of Glacial Deposition - web.viu.ca of Glacial Deposition.pdf · Landforms of terrestrial glacial depositional Ice-marginal Subglacial Glacial Glaciotectonic* moraines Flutes,

Landforms of Glacial Deposition - web.viu.ca of Glacial Deposition.pdf · Landforms of terrestrial glacial depositional Ice-marginal Subglacial Glacial Glaciotectonic* moraines Flutes,

Glacial Lakes and Glacial Lake Outburst Floods in Nepal

Glacial Lakes and Glacial Lake Outburst Floods in Nepal

The 2008 New Zealand Snow and Ice Research Group (SIRG ... · Chaired by Ian Owens 16:00 Bryan Storey Glacial history of the Darwin-Hatherton glacial system in the central Transantarctic

The 2008 New Zealand Snow and Ice Research Group (SIRG ... · Chaired by Ian Owens 16:00 Bryan Storey Glacial history of the Darwin-Hatherton glacial system in the central Transantarctic

Glacial processes

Glacial processes

Reasons Snow Important 10% of the Earth's surface is covered by glacial ice, with snow covering the glacial ice. * Small changes in climate can have very.

Reasons Snow Important 10% of the Earth's surface is covered by glacial ice, with snow covering the glacial ice. * Small changes in climate can have very.

Glacial Systems

Glacial Systems

Alpine & Continental Glaciers Glacial Mass Balance Glacial Ice … · 2017. 11. 29. · Alpine & Continental Glaciers Glacial Mass Balance Glacial Ice Formation Glacial Movement &

Alpine & Continental Glaciers Glacial Mass Balance Glacial Ice … · 2017. 11. 29. · Alpine & Continental Glaciers Glacial Mass Balance Glacial Ice Formation Glacial Movement &

Glacial Movement

Glacial Movement

Pilloud, M. The Taphonomy of Human Remains in a Glacial Environment

Pilloud, M. The Taphonomy of Human Remains in a Glacial Environment

Snow/Ice melt and Glacial Lake Outburst Flood in Himalayan regionrivers.bee.oregonstate.edu/sites/default/files/WorkshopPPTs/... · Snow/Ice melt and Glacial Lake Outburst Flood in

Snow/Ice melt and Glacial Lake Outburst Flood in Himalayan regionrivers.bee.oregonstate.edu/sites/default/files/WorkshopPPTs/... · Snow/Ice melt and Glacial Lake Outburst Flood in

Glacial Erosion

Glacial Erosion

DATING GLACIAL LANDFORMS Definition Dating glacial landforms. · sequences of glacial sediments. In some cases, the bound-aries of dating glacial landforms and dating glacial sedi-ments

DATING GLACIAL LANDFORMS Definition Dating glacial landforms. · sequences of glacial sediments. In some cases, the bound-aries of dating glacial landforms and dating glacial sedi-ments