I am interested in discovering the interactions between climate and marine organisms by geochemical methods. The Cenozoic Era is the closest to present and has gone through significant climate changes. Temperature, pH and oxygen levels in the ocean are the most important parameters of climate and factors of biological evolution. I have been using I/Ca as a redox proxy of different water depths, which is especially sensitive during oxic-anoxic transition. A good deal of carbonate associated trace metals have also been used to reconstruct past climate, and probably most of them are affected by calcium concentration in seawater. Now I am using Na/Ca to study how [Ca] changed through the Cenozoic, given the relatively long and short residence time of Na and Ca in seawater, respectively. The reconstruction of [Ca] history would provide a good correcting method for element/Ca proxies.
After acquiring bachelor's degree from University of Science and Technology of China, I went to Syracuse Universtiy to pursue my PhD degree. My PhD work is mostly about applying I/Ca and I/TOC in carbonate and organic matter respectively to reconstructing paleo-redox conditions of the upper ocean and bottom seawater. Now at Rutgers I am developing Na/Ca in carbonate as a proxy of Ca concentration in seawater and expecting to capture the changes in oceanic Ca reservoir during the Cenozoic Era.
Zhou, X., E. Thomas, A.M.E. Winguth, A. Ridgewell, H. Scher, B.A.A. Hoogakker, R.E.M. Rickaby, and Z. Lu, Benthic foraminiferal I/Ca records indicate potentially expanded oxygen minimum zones during the late Paleocene-early Eocene, Paleoceanography, in press.
Lu, Z., B. A. A. Hoogakker, C. Hillenbrand, X. Zhou, E. Thomas, K. M. Gutchess, W. Lu, L. Jones, and R. E. M. Rickaby, Oxygen depletion recorded in upper waters of the glacial Southern Ocean, Nature Communications, 7, doi:10.1038/ncomms11146.
Zhou, X., Z. Lu, R. E. M. Rickaby, E. W. Domack, J. S. Wellner, and H. A. Kennedy, 2015, Ikaite abundance controlled by porewater phosphorus level: potential links to dust and productivity, Journal of Geology, 123, 269-281, DOI:10.1086/681918.
Zhou, X., H. C. Jenkyns, J. D. Owens, C. K. Junium, X. Zheng, B. B. Sageman, D. S. Hardisty, T. W. Lyons, A. Ridgewell, and Z. Lu, 2015, Upper ocean oxygenation dynamics from I/Ca ratios during the Cenomanian¨CTuronian OAE 2, Paleoceanography, 30, 510-526, 10.1002/2014PA002741.
Zhou, X., E. Thomas, R. E. M. Rickaby, A. M. E. Winguth, and Z. Lu, 2014, I/Ca evidence for upper ocean deoxygenation during the Paleocene-Eocene Thermal Maximum (PETM), Paleoceanography, 29, 964-975.