Dr Andrea Burke

Senior Lecturer

tel: 01334 464015
fax:
email: ab276@st-andrews.ac.uk
room: 416  (Irvine Building)
Irvine Building
University of St Andrews
North Street
St Andrews
Fife
KY16 9AL
UK


General Information



My research is motivated by a desire to understand the interactions between ocean circulation, chemistry, and climate on a variety of timescales. To do this, I use isotope geochemistry and numerical modeling.  Current interests include: 

Southern Ocean circulation and CO2
Overturning circulation in the Southern Ocean plays a key role in CO2 regulation and heat transport.  Changes in Southern Ocean circulation are thought to control glacial-interglacial CO2 cycles in the past, and may have an important influence on anthropogenic 
CO2 uptake in the future.  To understand these processes I use radiocarbon as a tracer of ocean-atmosphere CO2 exchange and ocean circulation.  Much of my work has focused on deep sea corals, which provide an excellent archive for radiocarbon and other geochemical tracers, and can be precisely dated using uranium and thorium isotope ratios (Burke and Robinson, 2012, Chen et al., 2015).  This geochemical work is coupled with circulation modelling, including the application of inverse methods to explore protactinium/thorium changes in the deep Atlantic (Burke et al., 2011), and new approaches to dynamical modelling of Southern Ocean circulation (Ferrari et al., 2014; Burke, Stewart et al., 2015). 

Sulfur biogeochemistry and climate forcing
The sulfur cycle exerts an important control on earth's surface redox state, is intertwined with a variety of biogeochemical reactions, and may act as a major climate forcer.  To gain insights into these processes I make measurements of sulfur isotope ratios, using a new multi-collector inductively-coupled-plasma mass spectrometry (MC-ICPMS) technique (Paris et al., 2013).  The key advantage of this method is that it allows us to make measurements on extremely small samples, opening up a variety of exciting new research possibilities.  Current work includes constraining riverine fluxes of sulfur to the ocean, and reconstructions of climate forcing from volcanic sulfate aerosols.

 

 

Funding

Marie Curie Career Integration Grant (REINFORCE: Reconstructing and Interpreting the Forcing of Climate using Sulfur and Carbon Isotopes).  

NERC Standard Grant: REIMAGINATION: REconstructing and understanding the IMplications of surface radiocarbon AGe changes In the North Atlantic for overturning circulatTION)

 

Recent Publications

Struve, T, van de Flierdt, T, Burke, A, Robinson, LF, Hammond, SJ, Crocket, KC, Bradtmiller, LI, Auro, ME, Mohamed, KJ & White, NJ 2017, 'Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - Modern calibration and evaluation of palaeo-applications' Chemical Geology, vol 453, pp. 146-168. DOI: 10.1016/j.chemgeo.2017.01.022
Ivanovic, RF, Gregoire, LJ, Wickert, AD, Valdes, PJ & Burke, A 2017, 'Collapse of the North American ice saddle 14,500 years ago caused widespread cooling and reduced ocean overturning circulation' Geophysical Research Letters. DOI: 10.1002/2016GL071849
Ivanovic, R, Gregoire, L, Kageyama, M, Roche, D, Valdes, P, Burke, A, Drummond, R, Peltier, WR & Tarasov, L 2016, 'Transient climate simulations of the deglaciation 21-9 thousand years before present (version 1) - PMIP4 Core experiment design and boundary conditions' Geoscientific Model Development, vol 9, no. 7, pp. 2563-2587. DOI: 10.5194/gmd-9-2563-2016
Present, T, Paris, G, Burke, A, Fischer, W & Adkins, J 2015, 'Large Carbonate Associated Sulfate isotopic variability between brachiopods, micrite, and other sedimentary components in Late Ordovician strata' Earth and Planetary Science Letters, vol 432, pp. 187-198. DOI: 10.1016/j.epsl.2015.10.005
Chen, T, Robinson, LF, Burke, A, Southen, J, Spooner, P & Morris, PJ 2015, 'Synchronous centennial abrupt events in the ocean and atmosphere during the last deglaciation' Science, vol 349, no. 6255, pp. 1537-1541. DOI: 10.1126/science.aac6159
Burke, A, Stewart, AL, Adkins, JF, Ferrari, R, Jansen, MF & Thompson, AF 2015, 'The glacial mid-depth radiocarbon bulge and its implications for the overturning circulation' Paleoceanography, vol Early view. DOI: 10.1002/2015PA002778
Ferrari, R, Jansen, MF, Adkins, JF, Burke, A, Stewart, AL & Thompson, AF 2014, 'Antarctic sea ice control on ocean circulation in present and glacial climates' Proceedings of the National Academy of Sciences of the United States of America, vol 111, no. 24, pp. 8753-8758. DOI: 10.1073/pnas.1323922111
Margolin, AR, Robinson, LF, Burke, A, Waller, RG, Scanlon, KM, Roberts, ML, Auro, ME & van de Flierdt, T 2014, 'Temporal and spatial distributions of cold-water corals in the Drake Passage: insights from the last 35,000 years' Deep Sea Research Part II: Topical Studies in Oceanography, vol 99, pp. 237-248. DOI: 10.1016/j.dsr2.2013.06.008
Longworth, BE, Robinson, LF, Roberts, ML, Beaupre, SR, Burke, A & Jenkins, WJ 2013, 'Carbonate as sputter target material for rapid 14C AMS' Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, vol 294, pp. 328-334. DOI: 10.1016/j.nimb.2012.05.014
Thiagarajan, N, Gerlach, D, Roberts, ML, Burke, A, McNichol, A, Jenkins, WJ, Subhas, AV, Thresher, RE & Adkins, JF 2013, 'Movement of deep-sea coral populations on climatic timescales' Paleoceanography, vol 28, no. 1. DOI: 10.1002/palo.20023
Burke, A & Robinson, LF 2012, 'The Southern Ocean’s role in carbon exchange during the last deglaciation' Science, vol 335, no. 6068, pp. 557-561. DOI: 10.1126/science.1208163
Auro, ME, Robinson, LF, Burke, A, Bradtmiller, LI, Fleischer, MQ & Anderson, RF 2012, 'Improvements to 232-thorium, 230-thorium, and 231-protactinium analysis arising from GEOTRACES intercalibration' Limnology and Oceanography: Methods, vol 10, pp. 464-474. DOI: http://dx.doi.org/10.4319/lom.2012.10.464
McIntyre, CP, Roberts, ML, Burton, JR, McNichol, AP, Burke, A, Robinson, LF, von Reden, KF & Jenkins, WJ 2011, 'Rapid radiocarbon (14C) analysis of coral and carbonate samples using a continuous-flow accelerator mass spectrometry (CFAMS) system' Paleoceanography, vol 26, no. 4. DOI: 10.1029/2011PA002174
Bhatia, MP, Das, SB, Kujawinski, EB, Henderson, PB, Burke, A & Charette, MA 2011, 'Seasonal evolution of water source contributions to subglacial outflow: Insight from a new isotope-mixing model' Journal of Glaciology, vol 57, no. 205, pp. 929-941. DOI: http://dx.doi.org/10.3189/002214311798043861
Burke, A, Marchal, O, Bradtmiller, LI, McManus, JF & Francois, R 2011, 'Application of an inverse method to interpret 231Pa/230Th observations from marine sediments' Paleoceanography, vol 26, no. 1. DOI: 10.1029/2010PA002022
Burke, A, Robinson, LF, McNichol, AP, Jenkins, WJ, Scanlon, KM & Gerlach, DS 2010, 'Reconnaissance dating: A new radiocarbon method applied to assessing the temporal distribution of Southern Ocean deep-sea corals' Deep Sea Research Part I: Oceanographic Research Papers, vol 57, no. 1, pp. 1510-1520. DOI: http://dx.doi.org/10.1016/j.dsr.2010.07.010
Bockheim, JG, Kurz, MD, Soule, SA & Burke, A 2009, 'Genesis of active sand-filled polygons in lower and central Beacon Valley, Antarctica' Permafrost and Periglacial Processes, vol 20, no. 3, pp. 295-308. DOI: 10.1002/ppp.661
Gilbert, LA & Burke, A 2008, 'Depth-shifting cores incompletely recovered from the upper oceanic crust, IODP Hole 1256D' Geochemistry, Geophysics, Geosystems, vol 9, no. 8, Q08011. DOI: 10.1029/2008GC002010
Stoll, HM, Arevalos, A, Burke, A, Ziveri, P, Mortyn, G, Shimizu, N & Unger, D 2007, 'Seasonal cycles in biogenic production and export in Northern Bay of Bengal sediment traps' Deep Sea Research Part II: Topical Studies in Oceanography, vol 54, no. 5-7, pp. 558-580. DOI: http://dx.doi.org/10.1016/j.dsr2.2007.01.002


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