earth science

Pancake ice

Pancake ice is a earth science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Pancake ice rather than just read about it. In short: Pancake ice is a form of sea ice or freshwater ice that consists of round pieces of ice with diameters ranging from 30 centimetres (12 in) to 3 metres (9.8 ft) and thicknesses up to 10 centimetres (3.9 inches), depending on the local conditions. It forms as a result of wave action on slush or ice rind.

Key takeaways

Pancake ice belongs to earth science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Pancake ice to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Pancake ice from memory before moving on to harder problems.

Reference excerpt

Pancake ice is a form of sea ice or freshwater ice that consists of round pieces of ice with diameters ranging from 30 centimetres (12 in) to 3 metres (9.8 ft) and thicknesses up to 10 centimetres (3.9 inches), depending on the local conditions. It forms as a result of wave action on slush or ice rind.

Characteristics Pancake ice features elevated rims formed by piling of frazil ice or slush onto the edges of pancakes when they collide, both due to random bumping into each other and because of periodic compressions at wave troughs. These rims are the first indication of the onset of the formation of the pancake ice from less consolidated forms of ice.

Formation

Pancake ice forms in conditions of high wave activity, in contrast to other types of sea ice formed under calm conditions. Pancake ice can form in two processes: (1) on water covered to some degree in slush, shuga or grease ice, or (2) from breaking of ice rind, nilas or even gray ice in agitated conditions. If the waves are strong enough, pancakes can raft over each other, creating an uneven top and bottom surface on the ice. At this point, the pancake ice will fuse together and amalgamate into an ice floe. This ice floe will continue to grow over the winter. This process increases pancake ice's resilience, resulting in characteristic length scales less than ocean wavelengths and causing waves passing through pancake ice not to scatter.

Examples

Arctic Ocean

A notable example of pancake ice occurs in the Arctic Ocean, where a new prevalence of pancake ice is occurring, particularly along the ice edge, as a result of increasing Arctic wave activity.

References

External links

Definition of pancake ice from the Canadian Ice Service "Large 'ice pancake' forms on cold river in Braemar"—BBC News

Illustrations

Pancake ice: Pancake ice in the western part of the Baltic Sea — Pancake ice in the western part of the Baltic Sea

Worked examples

Example 1 — a first encounter with Pancake ice

Start with the simplest possible case. Write down what Pancake ice claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Pancake ice before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Pancake ice ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Pancake ice

In research: Pancake ice appears in earth science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Pancake ice in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Pancake ice is common in secondary-school and first-year university syllabi. It links to neighbouring topics Antarctica stubs, Arctic stubs, Glaciology stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Pancake ice outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Pancake ice in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pancake ice means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Pancake ice out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pancake ice in simple terms?

Why does Pancake ice matter?

Because it connects several earth science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Pancake ice?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Pancake ice.