earth science

Vibjörn Karlén

Vibjörn Karlén 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 Vibjörn Karlén rather than just read about it. In short: Vibjörn (Wibjörn) Karlén (born 26 August 1937 in Kristine, Kopparberg County, Sweden; died 22 October 2021) was a Swedish geologist who was professor emeritus of physical geography and quaternary geology at Stockholm University. In an article which describes Karlén as a paleoclimatologist, he is quoted as saying: "One of the big problems with trying to determine long-term temperature changes, is that weather records…

Key takeaways

Vibjörn Karlén 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 Vibjörn Karlén to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Vibjörn Karlén from memory before moving on to harder problems.

Reference excerpt

Vibjörn (Wibjörn) Karlén (born 26 August 1937 in Kristine, Kopparberg County, Sweden; died 22 October 2021) was a Swedish geologist who was professor emeritus of physical geography and quaternary geology at Stockholm University. In an article which describes Karlén as a paleoclimatologist, he is quoted as saying: "One of the big problems with trying to determine long-term temperature changes, is that weather records only go back to about 1860. By relying on statistical reconstruction of the last 1000 years, using only the temperature patterns of the last 140 years instead of actual temperature readings, the IPCC report and Summary missed both a major cooling period as well as a significant warming trend during that millennium." Karlén has also criticized the mainstream media for "spreading the exaggerated views of a human impact on climate." He was also named in a 2007 minority report of the U.S. Senate Environment and Public Works Committee as one of 400 "prominent scientists" who were said to dispute global warming. In 2010, he predicted that natural climate changes, caused to a large degree by the sun's activity, would more likely make the climate colder than warmer in the next decades. He was a contributing author to the Fraser Institute 2007 Independent Summary for Policymakers. Karlén was a member of the Royal Swedish Academy of Sciences and editor-in-chief of the journal Geografiska Annaler Series A, Physical Geography from 2004 to 2010.

References

Worked examples

Example 1 — a first encounter with Vibjörn Karlén

Start with the simplest possible case. Write down what Vibjörn Karlén 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 Vibjörn Karlén 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 Vibjörn Karlén 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 Vibjörn Karlén

In research: Vibjörn Karlén 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 Vibjörn Karlén 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: Vibjörn Karlén is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1937 births, 2021 deaths, 20th-century Swedish geographers, so understanding it makes those chapters shorter.
In everyday life: Look for Vibjörn Karlén 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.

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How to study Vibjörn Karlén in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Vibjörn Karlén 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 Vibjörn Karlén out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Vibjörn Karlén in simple terms?

Why does Vibjörn Karlén 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 Vibjörn Karlén?

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 Vibjörn Karlén.