- M.S., University of Alaska Fairbanks
- B.A., Bowdoin College
I study particle dynamics and water clarity at local, regional, and global scales. At local scales, my most recent field research focuses on how oysters in aquaculture settings mediate hydrodynamics, suspended particle characteristics, and water clarity. At regional scales, I investigate long term trends in Chesapeake Bay water clarity using observations and numerical modeling. I combine three methods to evaluate how water clarity has declined and potentially improved: a cruise-based dataset, satellite data, and 3D numerical modeling with the ChesROMS estuarine carbon and biogeochemistry (ECB) model. At global scales, I study marine particles as seen by optical imaging devices. For my M.S. work, I studied particle characteristics using the Underwater Vision Profiler (UVP) which photographs and sizes marine particles to investigate the total potential particulate carbon flux to depth.
- Pursuing Ph.D. Marine Science
Dissertation: Water clarity and suspended particle dynamics in Chesapeake Bay: local effects of oyster aquaculture, large scale processes, and long-term controls.
Advisors: Carl Friedrichs and Marjorie Friedrichs
- M.S. Oceanography, University of Alaska Fairbanks, 2015.
Certificate in Science Teaching and Outreach
Thesis: Investigating marine particle distributions and processes using in situ optical imaging in the Gulf of Alaska.
Advisor: Andrew McDonnell
- B.A. Earth and Oceanographic Science & Environmental Studies, Bowdoin College, 2013.
- Satellite Remote Sensing Training, Cornell University, Summer 2018.
- Study Abroad Program, Middlebury in Chile, Universidad Austral de Chile, Valdivia, Chile, Fall 2011.
- Turner, J.S., Pretty, J.L., & McDonnell, A.M.P. (2017) Marine particles in the Gulf of Alaska shelf system: spatial patterns and size distributions from in situ optics. Continental Shelf Research 145, 13-20 https://doi.org/10.1016/j.csr.2017.07.002
- Coastal Hydrodynamics and Sediment Dynamics Lab (CHSD)
- Biogeochemical Circulation Ocean Modeling (BioCOM)
- Long-term trends in water clarity in the Chesapeake Bay. September 2016 – present, Virginia Institute of Marine Science, Gloucester Point, Virginia. Currently investigating light attenuation, Secchi depth, and total suspended solids using time series analysis from 1984-present. Examining data from the Chesapeake Bay Program using time-series analysis.
- Implications of decreased shoreline erosion for water clarity in the Chesapeake Bay. November 2016 – present, Virginia Institute of Marine Science, Gloucester Point, Virginia. Currently using an estuarine biogeochemical model embedded within the ROMS hydrodynamic framework (ChesROMS-ECB) to investigate the effects of shoreline armoring on water clarity in the Chesapeake bay from the 1980s to present.
- Effects of southern Virginia oyster aquaculture on water clarity. February 2017 – May 2018, Virginia Institute of Marine Science, Gloucester Point, Virginia. Planned and developed sediment and water column field sampling, including in situ acoustics and optics, at four commercially-operating aquaculture sites in southwestern Chesapeake Bay. Trailered and captained small vessels, collected samples, performed laboratory analyses, and processed instrument datasets from 52 one-day sampling cruises. Mentored undergraduate students in the field and lab.
- Marine particle dynamics in the Gulf of Alaska. August 2013 – December 2015, University of Alaska Fairbanks. Participated on two 10-day oceanographic cruises in the Gulf of Alaska and one 6-week cruise in the Pacific Ocean. Collected data using two in-situ optical instruments. Analyzed data from a novel instrument to interpret large-particle processes occurring in the Gulf of Alaska and North Pacific Ocean.
- Clam Flat pH in Casco Bay, Maine. June 2012 – August 2012, Friends of Casco Bay, South Portland, Maine. Researched coastal acidification in southern Maine clam flats. Gathered and analyzed data on sediment pH and redox potential at 30 sites. Presented results at a symposium for community members, students, and environmental organizations.
- Investigating the effects of ocean acidification on Olympia oyster (Ostrea lurida) shell geochemistry. January 2013 – May 2013, Bowdoin College, Brunswick, Maine. Independent study incorporating mineral science and biological oceanography. Using scanning electron microscopy, studied the geochemical differences between oyster shells grown at current pCO2 concentrations and future pCO2 concentrations.