With training in Aquatic Biology and Oceanography, I work at the interface between sciences unraveling climate mysteries, exploring the relationship between sedimentary strata, and helping to improve water quality using electromagnetic sensing techniques.
My primary research interest is in the area of paleoclimate. I study sedimentary records to extract climate-related information on seasonal to glacial-interglacial time scales. I employ diverse methods ranging from marine micropaleontology to light isotope geochemistry and core and well logging to decipher Earth's climate record.
Sedimentology, Climate Change, Well Logging Energy/Sector, water quality, Environmental Geology, Climate, Environment, diversity in STEM education, geoscience STEM education, diversity and intercultural dialogue, interconnections of human organizations and social groups
Mitra, R., et al., (2019) Automated species-level identification of planktic foraminifera using convolutional neural networks, with comparison to human performance, Marine Micropaleontology, 147, 16-24
Dipre, G.R., et al. (2018) Plio-Pleistocene sedimentary record from the Northwind Ridge: new insights into paleoclimatic evolution of the western Arctic Ocean for the last 5 Mam, Arktos 4:24
Finkenbinder, M.S., et al. Millenial-scale variability in Holocene aquatic productivity from Burial Lake, Arctic Alaska
Lekki, J., et al Airborne Hyperspectral Imaging of Monitoring Harmful Algal Blooms in the Great Lakes Region: System Calibration and Validation From Photons to Algae Information: The Processes In-Between, NASA Technical Report, NASA Glenn Research Center
Steinman BA, Pompeani DP, Abbott MB, Ortiz JD, Stansell ND, Finkenbinder, MS, Mihindukulasooriya LN, and AL Hillman, Oxygen isotope records of Holocene climate variability in the Pacific Northwest, Quaternary Science Reviews 142, 40-60
Ali, KA, Ortiz, JD, Bonini, N, Shuman M, and C. Sydow, Application of Aqua MODIS sensor data for estimating Chlorophyll a in the turbid Case 2 waters of Lake Erie using bio-optical models, GIScience & Remote Sensing,
GS Bullerjahn, et al. Global solutions to regional problems: collecting global expertise to address the problem of harmful cyanobacterial blooms. A Lake Erie case study, Harmful Algae, 54, 223-238, 2016
Lajeunesse, P, et al. The Corossol Structure: a glaciated crater of possible impact origin in the northwestern Gulf of St. Lawrence (Eastern Canada) In Atlas of Submarine Glacial Landforms: Modern, Quaternary and Ancient, Geol. Society of London Memoir
Griffith, EM, Ortiz, JD, and Jefferson, AJ, Mimicking the Rayleigh Isotope Effect in the Ocean, Oceanography 28(4), 96–101, 2015
Bauch, D., Polyak, L, and Ortiz, JD, A Baseline for the vertical distribution of the stable carbon isotopes of dissolved inorganic carbon d13CDIC) in the Arctic Ocean, Arktos, 1(1):1-13, 2015
American Geophysical Union (AGU), Oceanography Society (TOS), Geological Society of America (GSA), Sigma Xi (Scientific research honor society), American Quaternary Association (AMQUA), National Association of Geoscience Teachers (NAGT), Northern Ohio Geological Society (NOGS)