Snow, water, ice and permafrost in the Arctic

Reporting from the frontline of climate change

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

A recent report by SWIPA looked at the changes facing the region, and described many impacts which were based on observations and research.

Key findings of the SWIPA report

1

The past six years (2005–2010) have been the warmest period ever recorded in the Arctic. Higher surface air temperatures are driving changes in the cryosphere.

2

There is evidence that two components of the Arctic cryosphere - snow and sea ice - are interacting with the climate system to accelerate warming.

3

The extent and duration of snow cover and sea ice have decreased across the Arctic. Temperatures in the permafrost have risen by up to 2°C. The southern limit of permafrost has moved northward in Russia and Canada.

4

The largest and most permanent bodies of ice in the Arctic - multiyear sea ice, mountain glaciers, ice caps and the Greenland Ice Sheet - have all been declining faster since 2000 than they did in the previous decade.

5

Model projections reported by the Intergovernmental Panel on Climate Change (IPCC) in 2007 underestimated the rates of change now observed in sea ice.

6

Maximum snow depth is expected to increase over many areas by 2050, with greatest increases over Siberia. Despite this, average snow cover duration is projected to decline by up to 20% by 2050.

7

The Arctic Ocean is projected to become nearly ice-free in summer within this century, and possibly within the next thirty to forty years.

8

Changes in the cryosphere cause fundamental changes to the characteristics of Arctic ecosystems and in some cases loss of entire habitats. This has consequences for people who receive benefits from Arctic ecosystems.

9

The observed and expected future changes to the Arctic cryosphere impact Arctic society on many levels. There are challenges, particularly for local communities and traditional ways of life. There are also new opportunities.

10

Transport options and access to resources are radically changed by differences in the distribution and seasonal occurrence of snow, water, ice and permafrost in the Arctic. This affects both daily living and commercial activities.

11

Arctic infrastructure faces increased risks of damage due to changes in the cryosphere, particularly the loss of permafrost and land-fast sea ice.

12

Loss of ice and snow in the Arctic enhances climate warming by increasing absorption of the sun's energy at the surface of the planet. It could also dramatically increase emissions of carbon dioxide and methane and change large-scale ocean currents. The combined outcome of these effects is not yet known.

13

Arctic glaciers, ice caps and the Greenland Ice Sheet contributed over 40% of the global sea level rise of around 3 mm per year observed between 2003 and 2008. In the future, global sea level is projected to rise by 0.9-1.6 m by 2100 and Arctic ice loss will make a substantial contribution to this.

14

Everyone who lives, works or does business in the Arctic will need to adapt to changes in the cryosphere. Adaptation also requires leadership from governments and international bodies, and increased investment in infrastructure.

15

There remains a great deal of uncertainty about how fast the Arctic cryosphere will change in the future and what the ultimate impacts of the changes will be. Interactions ('feedbacks') between elements of the cryosphere and climate system are particularly uncertain. Concerted monitoring and research is needed to reduce this uncertainty.

Summary report cover

Download your own summary copy of the SWIPA report.

Tasks

Put the key findings in order

Download the key findings table, print it out and then cut out the key findings as a set of cards.

Arrange the cards into a diamond layout, so that the most important or significant effects are placed at the top of the layout, and the least important at the bottom. Try ordering them according to various criteria.

Four million people live in the Arctic. How are their lives going to change according to the SWIPA report?

Discuss and research the issues that affect the area. Suggest what some of the likely future changes will be, before taking a look at the final section of the resource.

 

Home | 1: Climate change | 2: Living on the edge | 3: Arctic science | 4: Hunter or hunted? | 5: Postcard from the edge | 6: Troubled waters | 7: Resources from the edge | 8: Arctic Circumpolar Governance | 9: Snow, water, ice, permafrost | 10: Adapting to change

For teachers | Resource finder | Help | About the site/terms and conditions

Discovering Antarctica, our sister site