astronomy

Sally Archibald

Sally Archibald is a astronomy 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 Sally Archibald rather than just read about it. In short: Sally Archibald is a South African scientist and Professor at the University of Witwatersrand. Her research primarily focuses on savanna ecosystems within the context of global climate change as well as the exploration of fire ecology and earth-system feedbacks.

Key takeaways

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

Reference excerpt

Sally Archibald is a South African scientist and Professor at the University of Witwatersrand. Her research primarily focuses on savanna ecosystems within the context of global climate change as well as the exploration of fire ecology and earth-system feedbacks. Archibald was the recipient of the 2012 Mercer Award for her co-authorship of the paper "Tree cover in sub-Saharan Africa: Rainfall and fire constrain forest and savanna as alternative stable states".

Early life and education Sally Archibald attended the University of Cape Town in Cape Town, Western Cape from 2000 to 2002 where she received her MSc in botany. In 2010, Archibald received her PhD in ecology from the University of Witwatersrand in Johannesburg, Gauteng.

Career and research Archibald began her career at the University of Cape Town as a researcher in the Department of Biological Sciences from 1999 to 2000. Her primary research centered on assessing the ecological status and reserve selection of urban freshwater systems. From 2007 to 2009, Archibald served as the Visiting Student Research Collaborator in the Department of Ecology and Evolutionary Biology at Princeton University in Princeton, New Jersey. Archibald was the Principal Researcher at the Council for Scientific and Industrial Research (CSIR), located in Pretoria, Guateng in the Natural Resources and Environmental Research area from 2005 to 2014. Archibald is currently a Professor of Animal, Plant and Environmental Sciences at the University of Witwatersrand where she has taught since 2012. She teaches undergraduate courses in Fundamentals of Ecology, Whole Plant Physiology, and Functional Ecology in Changing Environments. Archibald's work incorporates ecological data gathered from the field, remote sensing, biogeochemistry and modeling. Archibald is involved in research projects at Yale University, the University of Edinburgh and the University of Liverpool, and is also working on research projects with the Global Change and Ecosystems group at the CSIR where she studies topics ranging from the relationship between fire and animal grazers, land-atmosphere feedbacks and savannas around the world.

Awards and honors Sally Archibald and one of her co-authors, Carla Staver, were the 2012 recipients of the George Mercer Award for their paper "Tree cover in sub-Saharan Africa: Rainfall and fire constrain forest and savanna as alternative stable states" which was published in Ecology in 2011. The George Mercer Award is presented to a researcher under the age of 40 who has authored an outstanding ecological research paper within the past two years. The committee selected Archibald and Staver due to their application of ecological theory to the exploration of the feedbacks that impact global vegetation patterns. The research added many contributions to the field of ecology including that transitions from forest to savannah along tropical latitudes result from changing fire patterns and will occur in the near future.

Selected publications Sally Archibald has published over 120 works which have been cited over 8,000 times. Her research focuses on savanna ecology, global climate change, fire ecology, vegetation dynamics and earth-system feedbacks. Some of Archibald's most cited works are listed here.

Staver, A. C.; Archibald, S.; Levin, S. A. (2011). "The Global Extent and Determinants of Savanna and Forest as Alternative Biome States". Science. 334 (6053): 230–232. Bibcode:2011Sci...334..230S. doi:10.1126/science.1210465. PMID 21998389. S2CID 11100977. Archibald, Sally; Roy, David P.; Van Wilgen, Brian W.; Scholes, Robert J. (2009). "What limits fire? An examination of drivers of burnt area in Southern Africa". Global Change Biology. 15 (3): 613–630. Bibcode:2009GCBio..15..613A. CiteSeerX 10.1.1.506.9279. doi:10.1111/j.1365-2486.2008.01754.x. S2CID 53330863. {{cite journal}}: Cite uses deprecated parameter |citeseerx= (help) Archibald, S.; Bond, W. J.; Stock, W. D.; Fairbanks, D. H. K. (2005). "Shaping the Landscape: Fire–Grazer Interactions in an African Savanna". Ecological Applications. 15 (1): 96–109. Bibcode:2005EcoAp..15...96A. doi:10.1890/03-5210. Staver, A. Carla; Archibald, Sally; Levin, Simon (2011). "Tree cover in sub-Saharan Africa: Rainfall and fire constrain forest and savanna as alternative stable states". Ecology. 92 (5): 1063–1072. Bibcode:2011Ecol...92.1063S. doi:10.1890/10-1684.1. PMID 21661567. Lehmann, C. E. R.; Anderson, T. M.; Sankaran, M.; Higgins, S. I.; Archibald, S.; Hoffmann, W. A.; Hanan, N. P.; Williams, R. J.; Fensham, R. J.; Felfili, J.; Hutley, L. B.; Ratnam, J.; San Jose, J.; Montes, R.; Franklin, D.; Russell-Smith, J.; Ryan, C. M.; Durigan, G.; Hiernaux, P.; Haidar, R.; Bowman, D. M. J. S.; Bond, W. J. (2014). "Savanna Vegetation-Fire-Climate Relationships Differ Among Continents". Science. 343 (6170): 548–552. Bibcode:2014Sci...343..548L. doi:10.1126/science.1247355. PMID 24482480. S2CID 45942940. Lehmann, Caroline E. R.; Archibald, Sally A.; Hoffmann, William A.; Bond, William J. (2011). "Deciphering the distribution of the savanna biome". New Phytologist. 191 (1): 197–209. doi:10.1111/j.1469-8137.2011.03689.x. PMID 21463328.

References

Worked examples

Example 1 — a first encounter with Sally Archibald

Start with the simplest possible case. Write down what Sally Archibald claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Sally Archibald 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 Sally Archibald 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 Sally Archibald

In research: Sally Archibald appears in astronomy 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 Sally Archibald 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: Sally Archibald is common in secondary-school and first-year university syllabi. It links to neighbouring topics 21st-century South African botanists, 21st-century South African women scientists, Academic staff of the University of the Witwatersrand, so understanding it makes those chapters shorter.
In everyday life: Look for Sally Archibald 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 Sally Archibald in 20 minutes

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

Frequently asked questions

What is Sally Archibald in simple terms?

Why does Sally Archibald matter?

Because it connects several astronomy 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 Sally Archibald?

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 Sally Archibald.