Introducing a Polar Literacy Initiative
The Polar Regions are facing changes with global consequences. From climate to food web changes, impacts continue to emerge, while the importance of our Polar Regions are often overlooked. The Polar Literacy Principles outline essential concepts to improve public understanding of these critical and sensitive ecosystems.
For polar scientists, these principles define the important concepts to convey when communicating the broader impacts of their research. For educators, these principles provide guidance on significant concepts to teach about the Polar Regions.
The Principles below represent the current version as developed by the Polar-ICE team: Rutgers University, California State University – Monterey Bay, Monterey Bay Aquarium Research Institute (MBARI), Eidos Education, Indiana University and Open Minds Media. Special thanks to our contributors including scientists and educators from Lamont Doherty Earth Observatory, Byrd Center for Polar and Climate Research, The Ohio State University, PolarTREC, and the Long-term Ecological Research Programs – Palmer Station and McMurdo Dry Valleys.
The Arctic and Antarctic Regions are unique because of their location on Earth.
1A: The Arctic and Antarctic are both cold environments but have different geographical features.
- 1A-1: The Arctic is an ice-covered ocean surrounded by land.
- 1A-2: Sea ice on Arctic Ocean averages ~2 meters thick.
- 1A-3: Antarctica is an ice-covered continent (land) surrounded by the Southern Ocean.
- 1A-4: Ice sheets on Antarctica average ~2-4 kilometers thick.
- 1A-5: Millions of years ago, Antarctica was more remote and less accessible to humans.
1B: Earth’s tilted axis affects polar seasons – summer and winter. During summer (Arctic – Jun, Jul, Aug; Antarctic – Dec, Jan, Feb) the sun does not set, and during winter (Arctic – Dec, Jan, Feb; Antarctic – Jun, Jul, Aug) the sun does not rise.
1C: The physical characteristics of the environment (weather, climate, topography, geology) are significantly different.
- 1C-1: The air temperature in Antarctica is much colder than in the Arctic.
- 1C-2: Temperature at the Poles is moderated by predominance of ocean versus land as well as elevation. Most of the terrestrial portion of the Arctic, with the exception of Greenland, is at sea level, while Antarctica is averages ~ 2.5 kilometers above sea level in elevation.
1D: Polar climates create different living conditions.
- 1D-1: In the Arctic, terrestrial life is widespread in ecosystems such as tundra and ocean. There are native human populations in the Arctic.
- 1D-2: In the Antarctic, terrestrial life is not widespread and is generally limited to the continental margin and the ocean. Vegetation is limited to mosses, liverworts, lichens and fungi that can survive extreme environments. There are no native human populations in Antarctica.
Ice is the dominant feature of the Polar Regions.
2A: Ice is dynamic and comes in many shapes and sizes—big, small, floating in water or layered on land, thin or thick, solid or porous soft.
- 2A-1: Land ice includes glaciers and ice sheets made from compacted snow (freshwater). Glaciers and ice sheets can extend over the ocean. Ice sheets that extend over the ocean are called ice shelves.
- 2A-2: Glaciers can break off (calve) into chunks that fall into the ocean as icebergs and cause sea level to rise.
- 2A-3: Icebergs are made of freshwater and float in the ocean. Icebergs move with winds and ocean currents.
- 2A-4: Sea ice forms when sea water freezes. The resulting ice is made from mostly fresh water because the salt precipitates out during the freezing process.
2B: Ice shapes the Polar landscape.
- 2B-1: Tundra is a treeless area with permanently frozen soil (permafrost) and low growing vegetation.
- 2B-2: Ice sheets and continental glaciers (land ice) are not static. Due to gravity, they flow downhill at varying rates of speed. Moving ice can move rocks and erode soil in its path.
- 2B-3: Areas of land ice larger than 50km2 are found only on Greenland and Antarctica. The Antarctic ice sheets are the largest on Earth, containing 90% of the world’s ice, while the Greenland ice sheet contains 10%.
- 2B-4: It is estimated that all the world’s ice caps, glaciers and permanent snow contain 68.7% of the freshwater available on Earth. Freshwater is only 1.74% of the total amount of water on Earth. “Unlocking” freshwater from ice caps and glaciers will have ripple effects on the global ecosystem.
2C: Sea ice naturally shrinks and expands with the seasons. However, this natural dynamic cycle is affected by increasing air and water temperatures occurring at the Poles due to climate change.
Polar Regions play a central role in regulating Earth’s weather and climate.
3A: Polar oceans play a key role in global circulation of ocean water and air masses that keep the Earth temperate.
- 3A-1: Global wind circulation involves three types of cells: Hadley, Ferrel, and Polar cells. Air rises in the hot tropics and sinks at the cold poles. Winds bring warm air toward the poles and carry cold air to lower latitudes.
- 3A-2: Global ocean circulation (thermohaline circulation) is driven by density differences of water masses in the ocean. The dense (cold and salty) Arctic and Antarctic water masses are two important components of global circulation patterns.
- 3A-2a: Warmer surface waters from the equatorial regions travel towards the poles. As the water travels, it cools and sinks at the poles.
- 3A-2b: The sinking (more dense water) flows into the ocean basins and eventually upwells.
- 3A-2c: Ocean circulation has a large impact on the Earth’s climate. If ice caps, glaciers and permanent snow were to melt, that would “unlock” the freshwater which flows into the ocean – causing a “freshening” or increase of freshwater in the ocean and upsetting ocean circulation patterns.
3B: Ice and snow (white surfaces) reflect sunlight back into space. Ocean and land (dark surfaces) absorb more solar energy. As ice and snow disappear, heat is absorbed by exposed surfaces, which accelerates melting of additional ice and snow. Scientists use the term albedo to describe the measurement of the reflectivity of the Earth’s surface.
- 3B-1: Ice and snow have a high reflectivity (albedo) while rock and ocean surfaces have a low (reflectivity) albedo. Melting ice and snow produce a positive feedback loop.
- 3B-2: Positive feedback loops amplify a change in a system making it more unstable.
- 3B-3: Negative feedback buffers change in a system making it more stable.
- 3B-4: Snow and ice in Polar Regions are involved in mainly positive feedbacks, which is why the Arctic region is annually warming faster than the rest of the planet.
The Polar Regions have productive food webs.
4A: Productivity (generation of life) is tied to seasonal changes in sea ice cover, water and air temperature.
4B: Sea ice cover, water and air temperature change with the seasons.
- 4B-1: Phytoplankton, tiny plants at the base of the food web, grow abundantly during the long days of polar summer. Krill (small shrimp-like crustaceans) feed on plankton.
- 4B-2: Each winter, as sunlight and temperatures decrease, sea ice grows to cover large areas of ocean. Young krill survive their first winter by feeding on algae on the underside of the sea ice and the ice provides shelter from predators.
- 4B-3: Krill serve as food for the higher levels in the Polar food webs.
4C: The Antarctic food web is simple and dependent on ice.
- 4C-1: Antarctica is home to marine mammals (whales and seals) and sea birds, including penguins. Antarctica has not home to terrestrial mammals. Polar bears do not live in Antarctica.
- 4C-2: Many Antarctic species (krill, penguins) are dependent on ice cover to survive; they serve major roles in the Antarctic marine food web.
- 4C-3: There is a simple terrestrial food web that exists in regions of the Antarctic, but it is not directly connected to the marine food web.
4D: The Arctic has a more complex food web.
- 4D-1: The Arctic has many terrestrial mammals including musk ox, reindeer, caribou, fox, hare, lemmings, bears, birds and terrestrial plants, etc.
- 4D-2: The Arctic also has a marine food web that does interact with the terrestrial food web, with some animals like polar bears in both food webs. Penguins do not live in the Arctic.
4E: Marine and terrestrial predators are predictors (indicators) of change in food webs. Effects from climate change are causing disruptions in ecosystems. Predator displacement or food selection changes are resulting in systemic changes in Polar food webs. Examples include: in some regions, polar bears are feeding on geese; bird migration changes; fish populations are changing.
The Poles are experiencing the effects of climate change at an accelerating rate.
5A: Arctic sea ice is declining at a rapid rate.
- 5A-1: Scientists predict the Arctic will be largely free of sea ice during the summer months within 30 years.
- 5A-2: The receding ice cover affects the Arctic food webs and the global ocean circulation, however, the long-term impacts are unclear.
- 5A-3: Melting sea ice does not contribute to sea level rise. This ice is already floating in/on the water, therefore the water level stays the same as it melts.
5B: Antarctica is experiencing less sea ice loss than in the Arctic – for now.
- 5B-1: Antarctic and Southern Ocean air temperatures are predicted to rise in the future, threatening ice stability.
5C: The Western Antarctic Peninsula (WAP) is the fastest winter-warming region in the world (about 10 times faster than global average)
- 5C-1: Antarctic ice shelves are floating extensions of the land ice. They are critical to ice stability in Antarctica, forming a buttress to hold back the ice behind them. Antarctica is surrounded by ~45 ice shelves that are susceptible to a warming atmosphere and ocean.
- 5C-2: The warming Southern Ocean flows close to the WAP, causing melting at the ice shelves and the base of glaciers. This accelerates the WAP glacier melt and collapse.
- 5B-4: Increased glacial melt affects the WAP food web.
5D: Warmer Polar Regions have a moister atmosphere, which leads to more precipitation.
- 5D-1: Increased precipitation, falling as snow or rain, can affect Polar animals.
- 5D-1a: In Antarctica, Adelie penguins’ breeding can be disrupted by heavy snow cover and unseasonable rains.
- 5D-1b: In the Arctic, precipitation is predicted to increase by 20% by the end of the century, mostly in the form of rain. Increased rain will further melt snow, ice and permafrost, restricting land animals nesting sites and ability to forage. Increased rain will also cause “freshening” of the ocean water, which will impact the marine ecosystem.
5E: Effects of climate change at the Poles is directly connected to changes in sea level around the world.
- 5E-1: The amount of water frozen to create the Greenland and Antarctica ice sheets and glaciers helps regulate our current sea level.
- 5E-2: Sea-level rise is caused by melting ice sheets and glaciers, combined with the thermal expansion of seawater as the oceans warm.
- 5E-3: Global coastlines are home to 80% of the world’s population, which are being threatened by sea-level rise.
- 5E-4: Many Polar species will face migration, adaption, death or extinction in a changing climate.
5F: The Poles are locations of increasing Geopolitical issues.
- 5F-1: Decreasing ice cover in the Polar Regions will result in emerging geopolitical issues including: increased military presence, territorial boundary/sovereign rights issues, exploration and harvesting of natural resources (animal and mineral), increased tourism, failing infrastructure and more.
- 5F-2: The increasing human presence in the Polar Regions compounds existing concerns (pollution, overuse of fragile infrastructure, harvesting resources).
Humans are a part of the Polar system. The Arctic has a rich cultural history and diversity of Indigenous Peoples.
6A: Humans have inhabited the Arctic for thousands of years. There is evidence of human Arctic presence from over 40,000 years ago. Humans continually adapted to inhabit the unique environment.
6B: Polar systems affect humans in a variety of ways.
- 6B-1: Weather patterns – large dips in the jet stream can sweep cold air into lower latitudes where billions of people live.
- 6B-2: Climate change- changes at the Poles affect people around the world through global ecosystem changes.
- 6B-3: Food webs- loss of sea ice and a warming ocean is disrupting fisheries across the globe.
- 6B-4: Loss of sea ice is resulting in greater coastal erosion during winter storms.
6C: Climate change is affecting Arctic residents (about 4 million), including 40 different indigenous groups (about 10% of Arctic residents), through impacts to their environments, food webs and infrastructure.
- 6C-1: Receding sea ice is affecting animals that depend on ice cover (fish, polar bears, walruses, seals, humans).
- 6C-2: Species are migrating and/or declining, affecting the people who depend on those species for food, clothing, and other uses – and larger ecosystem implications. Importing goods to these regions is very expensive which significantly increases costs, so many Arctic residents depend on hunting and fishing for food.
- 6C-3: Thawing permafrost is damaging homes, roads, pipelines, buildings and ecosystems.
- 6C-4: Coastal villages in Alaska are particularly prone to the effects of coastal erosion and storm surge during winter storms. Some entire villages are relocating.
6D: Arctic indigenous people are important partners to the science community in understanding and observing the Arctic.
- 6D-1: Native knowledge of Polar Regions contributes to the understanding of natural ecological cycles and the impacts of climate change on the system.
- 6D-2: Traditional knowledge has proven essential for subsistence harvesting and for sustainable management of natural resources.
6E: The Arctic region of the United States holds sizable proved and potential conventional energy (oil and natural gas resources) and renewable energy (geothermal, tidal, wind, etc.). The impacts of extraction of the resources is questionable.
New technologies, sensors and tools — as well as new applications of existing technologies — are expanding scientists’ abilities to study the land, ice, ocean, atmosphere and living creatures of the Polar Regions.
7A: Historically, Polar explorers took photographs and collected observational data (primarily atmospheric and meteorological observations) at various intervals during explorations to the Poles, providing a discrete understanding of the Poles.
7B: Today, scientists use satellites, drifting buoys, tethered buoys, subsea observatories, unmanned submersibles, and automated weather stations to constantly and remotely study the Poles.
- 7B-1: This baseline information is coupled with regular scientific explorations to the Poles to collect samples and measurements, including photographic evidence.
7C: Piecing together historical data recorded by early explorers with ice cores and sediment cores gives scientists an understanding of natural history.
- 7C-1: Combining current data with historical data, scientists can construct models to understand connections in the past and improve predictions of future environmental conditions at the Poles.
7D: Antarctica’s high elevation and dry atmosphere allow measurements of cosmic microwave background (fossil light from the early universe).
7E: Scientists measure the ice and snow levels over many decades to observe the impact of climate change in the Arctic landscape.
7F: Scientists are gathering genetic information across a range of Polar species, from DNA to the broad ecosystem.
- Genomic sequencing of polar species provides insight into complex biological processes and biotechnological exploitation (development of new drugs, bioremediation, food systems, etc.)
Download a PDF of the Polar Literacy Principles PLP_Brochure_Feb2018