Branwen Williams
Associate Professor of Environmental Science
Office: Keck Science Center 227
Phone: 909-607-8017
Office Hours:
Web Site:
Educational Background:
Ph.D., Geological Sciences, School of Earth Sciences, Ohio State University, Columbus, OH (2009)
M.Sc., Biology, GEOTOP, University of Quebec at Montreal, Montreal, QC (2005)
B.Sc., Marine and Freshwater Biology, Department of Zoology, University of Guelph, Guelph, ON (2003)
Courses Taught:
EA 100L KS: Global Climate Change
EA 30L KS: Science and the Environment
EA 104 KS: Oceanography
Research Interests:
Development and interpretation of new types of proxy records from marine organisms
Penetration of anthropogenic carbon into marine environments and the resulting ocean acidification
Natural and anthropogenic-induced ocean and climate variability over the past millennium
Selected Publications List: Click to open new window.
1.   Dassié, E.P., DeLong, K.L., Kilbourne, K.H., Williams, B., et al . (2017). Save our Marine Annually-Resolved Proxy Archives (MARPA)!. EOS   98: 10.1029/2017EO068159.
2.   McMahon, K.**, Williams, B., Guilderson, T.P., Glynn, D., and McCarthy, M . (2017). Calibrating amino acid δ13C and δ15N offsets between polyp and protein skeleton to develop proteinaceous deep-sea corals as paleoceanographic archives. Geochimica et Cosmochimica Acta   220: 261-275. Article
3.   Williams, B., Halfar, J., DeLong, K.L., Smith, E., Steneck, R., Lebednik, P., Jacob, D.E., Fietzke, J., Moore, G.W.K . (2017). 20th century North Pacific decadal-scale variability is unique for the past 342 years. Geophysical Research Letters   44: 3761–3769, doi: 10.1002/2017GL073138.
4.   Chan, P., Halfar, J., Hetzinger, S., Adey, W., Zack, T., Moore, G.W.K., Wortmann, U.G., Williams, B., and Hou, A . (2017). Multicentennial Record of Labrador Sea Primary Productivity and Sea-Ice Variability Archived in Coralline Algal Ba/Ca. Nature Communications   8: 15543, doi: 10.1038/ncomms15543.
5.   Chan, P., Halfar, J., Hetzinger, S., Adey, W., Zack, T., Moore, G.W.K., Wortmann, U.G., Williams, B., and Hou, A . (2017). Multicentennial Record of Labrador Sea Primary Productivity and Sea-Ice Variability Archived in Coralline Algal Ba/Ca. Nature Communications   8: 15543 . Article
6.   Williams, B., Thibodeau, B., Chikaraishi, Y., Ohkouchi, N., Walnum, A., Grottoli, A., and Colin, P . (2016). Investigating variations in primary productivity in the Tropical Pacific Ocean due to multi-decadal nitricline depth fluctuation. Limnology and Oceanography   : 10.1002/lno.10364.
7.   Bougeois, L., Williams, B., Halfar, J., Konar, B., Adey, W., Kronz, A., and Wortmann, U . (2015). Does the coralline alga Leptophytum fecundum (Kjellman) capture paleoenvironmental variability in the Arctic Ocean?. Arctic, Antarctic, and Alpine Research   47: 167-179.
8.   Carilli, J., Williams, B., Schöne, B. R., Krause, R. A., & Fallon, S. J . (2015). Historical Contaminant Records from Sclerochronological Archives. Environmental Contaminants  Springer Netherlands : 355-391.
9.   Prouty, N.G., Roark, E.B., Andrews, A., Robinson, L., Hill, T., Sherwood, O., Willams, B., Guilderson, T., Fallon, S . (2015). Age, Growth Rates, and Paleoclimate Studies of Deep Sea Corals. The State of Deep-Sea Coral and Sponge Ecosystems of the United States Hourigan, T.F., Etnoyer, P.J., Cairns, S.D., Tsao, C.-F NOAA,Silver Spring 10: 1-21.
10.   Wang, X., Prokopenko, M., Sigman, D., Adkins, J.F., Robinson, L.F., Ren, H., Oleynik, S., Williams, B., and Haug, G . (2014). Isotopic composition of carbonate-bound organic nitrogen in deep-sea scleractinian corals: A new window into past biogeochemical change. Earth and Planetary Science Letters   400: 243-250. Article
11.   Williams, B., Halfar, J., DeLong, K., Hetzinger, S., Steneck, R.S., and Jacob, J.E . (2014). Multi-specimen and multi-site calibration of Aleutian coralline algae Mg/Ca to climate signals. Geochimica et Cosmochimica Acta   139: 190-204. Article
12.   Adey, W., Halfar, J., and Williams, B . (2013). Biological, physiological and ecological factors controlling clathrostrome formation and producing a precision Arctic/Subarctic marine climate archive: the calcified coralline genus Clathromorphum Foslie. Smithsonian Institution Contributions to the Marine Sciences   : .
13.   Hönisch, B., Ridgwell, A., Schmidt, D.N., Thomas, E., Gibbs, S.J., Sluijs, A., Zeebe, R., Kump, L., Martindale, R., Greene, S., Kiessling, W., Ries, J., Zachos, J., Royer, D., Barker, S., Marchitto Jr, T.M., Moyer, R., Pelejero, C, Ziveri, P., Foster, G.L., and Williams, B . (2012). The geological record of ocean acidification. Science   335: 1058-1063. Article
14.   Williams, B., Halfar, J., Steneck, R. S., Wortmann, U. G., Hetzinger, S., Adey, W., Lebednik, P., and Joachimski, M . (2011). Twentieth century d13C variability in surface water dissolved inorganic carbon recorded by coralline algae in the northern North Pacific Ocean and the Bering Sea. Biogeosciences   8: 165-174, doi: 10.5194/bg-8-165-2011.
15.   Williams, B., and Grottoli, A.G . (2011). Solution and laser ablation inductively coupled plasma mass spectrometry (ICP-MS) measurements of Br, I, Pb, Mn, Cd, Zn, and B in the organic skeleton of soft corals and black corals. Geochemistry, Geophysics, Geosystems   12: Q03011, doi:10.1029/2010GC003375 .
16.   Sinclair, D.J., Williams, B., Allard, G., Ghaleb, B., Ross, S.W., and Risk, M.J . (2011). Reproducibility of trace element profiles in a specimen of the deep-water Bamboo Coral Keratoisis sp.. Geochimica et Cosmochimica Acta   75: 5101-5121.
17.   Halfar, J., Williams, B., Hetzinger, S., Steneck, B., Lebednik, P.,Winsborough, C., Omar, G., and Chan, P . (2011). 225 years of Bering Sea climate and ecosystem dynamics archived by coralline algae. Geology   39: 579-582.
18.   Chan, P., Halfar, J., Williams, B., Hetzinger, S., Steneck, R., Zack, T., and Jacob, D . (2011). Freshening of the Alaska Coastal Current recorded by coralline algal Ba/Ca ratios. Journal of Geophysical Research   116: G01032, doi:10.1029/2010JG001548.
19.   Halfar, J., Hetzinger, S., Adey, W., Zack, T., Gamboa, G., Kunz, B., Williams, B., and Jacob, D . (2011). Coralline red algal growth increment widths archive North Atlantic climate variability. Palaeogeography, Palaeoclimatology, Palaeoecology   320: 71-80.
20.   Williams, B., and Grottoli, A.G . (2010). Variability in δ15N and δ13C values of alcyonacean and antipatharian corals from the western equatorial Pacific. Geochimica et Cosmochimica Acta   74: 5280-5288.
21.   Williams, B., and Grottoli, A.G . (2010). Recent shoaling of the nutricline and thermocline in the western tropical Pacific. Geophysical Research Letters   37: L22601, doi:10.1029/2010GL044867.
22.   Williams, B., Risk, M.J., Ross, S.W., and Sulak, K.J . (2007). Stable isotope records from deep-water antipatharians: 400-year records from the south-eastern coast of the United States of America. Bulletin of Marine Science   81: 437-447.
23.   Williams, B., Risk, M.J., Stone, R., Sinclair, D.J. and Ghaleb, B . (2007). Oceanographic changes in the Gulf of Alaska over the past century recorded in deep-water gorgonian corals. Marine Ecology Progress Series   335: 85-94.
24.   Williams, B., Risk, M.J., Ross, S.W., and Sulak, K.J . (2006). Deep-water Antipatharians: proxies of environmental change? . Geology   34: 773-776, doi: 10.1130/G22685.1.
25.   Sinclair, D.J., Williams, B., and Risk, M . (2006). Trace element "Vital Effects" - a ubiquitous feature of Scleractinian coral skeletons. Geophysical Research Letters   33: L17707, doi:10-102932006GL027183.
26.   Risk, M.J., Hall-Spencer, J., and Williams, B . (2005). Climate records from the Faroe-Shetland Trough using Lophelia pertusa (Linneaus, 1758). Cold-water Corals and Ecosystems, Erlangen Freiwald, A., Robert, M  : 1097-1108.