glaciers and ice-sheets Flashcards
cyrosphere
termfor the portions of the Earths surface where water is solid form inclusing sea ice, lake ice, river ice + snow cover
most seasonal change:
-sea ice
-peri-glacial zones
-subject to the most seasonal change in ice volume
-land, such as tundra, covered by snow every winter
less seasonal variation:
-land covered by glaciers
-ice sheets
-land underlain by permafrost
-less seasonal variation, due to larger volumes of ice.
glaciers
a body of ice formed on land and and in motion, confined by terrain (most commonly valleys)
most common in Alpine areas:
height + cold + snowfall
see diagram in notebook
ice sheet
vast masses of ice that bury land beneath them and are not confined to valleys.
Antarctica and Greenland ice sheets have 99% of freshwater ice.
large land form
ice sheet loss in greenland
from 1992-2022 ice sheets have estimated to have lost approx. 1,140 billion tons
21% mass loss
glacier loss in Greenland
176 billion tons
global sea level rise on greenland
7.2 meters
unemployment rates in Greenland:
has an aging population
10% unemployment rate
loss of indigenous cultures in Greenland:
include inuit + eskimos
Greenlandic indigenous cultures rely on both sea ice and inland ice for food security, travel and indigenous traditions.
therefore ice melt will lead to a loss of indigenous cultures, which have previously lasted thousands of years.
loss of freshwater in Greenland:
melting of glaciers means less clean water for a population.
+
less water available to irrigation.
2.5 million litres the entire year of ice has been lost.
Greenland economy product trade:
Melting ice therefore changes sea level an temperature killing off large amounts of fish or displacing them through migration, meaning it is more difficult to fish.
The surface waters surrounding Greenland have warmed by approximately 0.5°C to 1.5°C over the past few decades
Greenland tourism loss:
In 2019, Greenland saw around 100,000 tourists
-decreased in previous years
fun fact
if all of Greenlands glaciers melt, sea levels will be 7 meters above present day