earth science

Margaret Delaney

Margaret Delaney 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 Margaret Delaney rather than just read about it. In short: Margaret (Peggy) Delaney is marine geochemist known for her research on trace elements to examine changes in ocean chemistry over time. Education and career Delaney earned her B.S. in chemistry from Yale University in 1973 and a Ph.D. from the Massachusetts Institute of Technology/Woods Hole Oceanographic Institution Joint Program (1983).

Key takeaways

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Reproduce the core statement of Margaret Delaney from memory before moving on to harder problems.

Reference excerpt

Margaret (Peggy) Delaney is marine geochemist known for her research on trace elements to examine changes in ocean chemistry over time.

Education and career Delaney earned her B.S. in chemistry from Yale University in 1973 and a Ph.D. from the Massachusetts Institute of Technology/Woods Hole Oceanographic Institution Joint Program (1983). Following her Ph.D., Delaney joined the University of California Santa Cruz in 1983, and later became chair of the Ocean Sciences Department. At the time of her retirement in 2020, Delaney was Vice Chancellor for Planning and Budget at the University of California Santa Cruz. In her service to the community, Delaney was the editor of the journal Paleoceanography and Paleoclimatology from 1996 to 1999. In 2005, Delaney started a three-year term as editor of the journal Earth and Planetary Sciences. She was also involved in the leadership and management of the Ocean Drilling Program (ODP) and the Integrated Ocean Drilling Program (IODP). In 2004, Delaney was elected a fellow of the American Geophysical Union and the citation noted her:

innovative work defining links between biogeochemically important elements and past changes in climate; and her altruistic and exemplary service to the oceanographic community

Research Delaney's research used geochemical measurements to examine changes in ocean chemistry. She looked at concentration of trace elements in shells of foraminifera and was the first to show that changes in the ratios of elements such as lithium, strontium, and calcium were linked to environmental conditions experienced by the foraminifera. These elemental ratios in corals can be used to reconstruct ocean chemistry and Delaney examined trace element levels in corals found at the Galapagos Islands. In marine sediments, Delaney examined the accumulation of phosphorus in the equatorial Pacific, tracked phosphorus from riverine sources and particles to the seafloor. Delaney applied these geochemical tools to studies of the Pliocene, the Paleocene-Eocene Thermal Maximum, and changes in the ocean currents around Antarctica.

Selected publications Delaney, M. L. (1998). "Phosphorus accumulation in marine sediments and the oceanic phosphorus cycle". Global Biogeochemical Cycles. 12 (4): 563–572. Bibcode:1998GBioC..12..563D. doi:10.1029/98GB02263. Wara, M. W.; Ravelo, Ana Christina; Delaney, Margaret L. (2005-07-29). "Permanent El Nino-Like Conditions During the Pliocene Warm Period". Science. 309 (5735): 758–761. Bibcode:2005Sci...309..758W. doi:10.1126/science.1112596. ISSN 0036-8075. PMID 15976271. S2CID 37042990. Delaney, Margaret Lois; Bé, Allan W.H.; Boyle, Edward A. (1985-06-01). "Li, Sr, Mg, and Na in foraminiferal calcite shells from laboratory culture, sediment traps, and sediment cores". Geochimica et Cosmochimica Acta. 49 (6): 1327–1341. Bibcode:1985GeCoA..49.1327D. doi:10.1016/0016-7037(85)90284-4. ISSN 0016-7037. Filippelli, Gabriel M.; Delaney, Margaret Lois (1996-05-01). "Phosphorus geochemistry of equatorial Pacific sediments". Geochimica et Cosmochimica Acta. 60 (9): 1479–1495. Bibcode:1996GeCoA..60.1479F. doi:10.1016/0016-7037(96)00042-7. ISSN 0016-7037.

Awards and honors Fellow, American Geophysical Union (2004) Fellow, The Oceanography Society (2005) Outstanding Educator Award, Association for Women Geoscientists (1993)

References

Worked examples

Example 1 — a first encounter with Margaret Delaney

Start with the simplest possible case. Write down what Margaret Delaney 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 Margaret Delaney 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 Margaret Delaney 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 Margaret Delaney

In research: Margaret Delaney 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 Margaret Delaney 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: Margaret Delaney is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fellows of the American Geophysical Union, Living people, Marine geologists, so understanding it makes those chapters shorter.
In everyday life: Look for Margaret Delaney 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 Margaret Delaney in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Margaret Delaney 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.
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Frequently asked questions

What is Margaret Delaney in simple terms?

Margaret (Peggy) Delaney is marine geochemist known for her research on trace elements to examine changes in ocean chemistry over time. Education and career Delaney earned her B.S. in chemistry from Yale University in 1973 and a Ph.D. from the Massachusetts Institute of Technology/Woods Hole Oceano…

Why does Margaret Delaney 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 Margaret Delaney?

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 Margaret Delaney.