earth science

Global Change Information System

Global Change Information System 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 Global Change Information System rather than just read about it. In short: The U.S. Global Change Research Program (USGCRP) develops and curates the Global Change Information System (GCIS) to establish "data interfaces and interoperable repositories of climate and global change data which can be easily and efficiently accessed, integrated with other data sets, maintained and expanded over time." The initial focus of GCIS is to support the United States Third National Climate Assessment (NC…

Key takeaways

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

Reference excerpt

The U.S. Global Change Research Program (USGCRP) develops and curates the Global Change Information System (GCIS) to establish "data interfaces and interoperable repositories of climate and global change data which can be easily and efficiently accessed, integrated with other data sets, maintained and expanded over time." The initial focus of GCIS is to support the United States Third National Climate Assessment (NCA3), which is to publish reports that enhance the transparency and ability of decision-makers to understand the conclusions and use of the underlying data for their own purposes.

Scope of work The project scope includes analyzing alterations in climate, land use and land cover, natural resources including water, agriculture and biodiversity, atmospheric composition, chemical composition and ecological systems that may alter the Earth's capacity to sustain life. Global change research includes activities aimed at describing and understanding the interactive physical, chemical and biological processes that regulate the Earth system; the unique environment that the Earth provides for life; changes that are occurring in the Earth system; and the manner in which such systems, environments and changes are influenced by human actions.

Provenance and semantics GCIS has developed information models and ontology to represent the content structure of the NCA3 and its associated provenance information and has been extending its models to incorporate more global change information. Records of objects and relationships within the GCIS are represented in a database for the Semantic Web, which can be queried using the SPARQL language. GCIS assigns globally unique persistent identifiers to all of the entities, activities, and agents relevant to provenance. Each identifier is mapped to a uniform resource identifier (URI) in the GCIS namespace, allowing use of those identifiers for the Semantic Web and other linked data systems. By categorizing, annotating, and linking provenance information, the GCIS becomes capable of answering provenance-tracking questions about global change research.

GCIS ontology The GCIS Ontology promotes representation and documentation by incorporating the World Wide Web Consortium (W3C)’s recommendation on provenance modeling (PROV) into the design. The ontology uses the namespace prefix GCIS. A conceptual map of the GCIS Ontology version 1.2 is accessible on the Web.

References

This article incorporates public domain material from About the Global Change Information System. U.S. Global Change Research Program.

Worked examples

Example 1 — a first encounter with Global Change Information System

Start with the simplest possible case. Write down what Global Change Information System 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 Global Change Information System 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 Global Change Information System 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 Global Change Information System

In research: Global Change Information System 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 Global Change Information System 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: Global Change Information System is common in secondary-school and first-year university syllabi. It links to neighbouring topics Climate change organizations based in the United States, Information systems, so understanding it makes those chapters shorter.
In everyday life: Look for Global Change Information System 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 Global Change Information System in 20 minutes

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

Frequently asked questions

What is Global Change Information System in simple terms?

Why does Global Change Information System 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 Global Change Information System?

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 Global Change Information System.