John A. Callahan

John A. Callahan

Visiting Assistant Professor

Office Location
125 Academy St.
216D Pearson Hall
University of Delaware
Newark, DE 19716



  • Ph.D. Climatology, Department of Geography and Spatial Sciences, University of Delaware; Title: Skew Surge and Extreme Coastal Flooding Events in the Delaware and Chesapeake Bays of the U.S. Mid-Atlantic Coast for 1980 – 2019
  • M.Sc. Geography, University of Delaware; Title: Estimation of Precipitable Water Over the Amazon Basin Using GOES Imagery
  • B.Sc. Physics, Temple University, Philadelphia, PA
  • B.Sc. Mathematics, Temple University, Philadelphia, PA

Research Interests

Meteorological drivers of storm surge and coastal flooding; tides and tidal data analysis; climate change and sea-level rise in the US Mid-Atlantic; coastal storm frequency and their impacts; regional atmospheric circulation patterns and teleconnections; natural hazards and coastal resilience; coastal inundation mapping; water resources; dendrochronology and climate-tree growth relationships; environmental data collection and distribution; satellite remote sensing of the atmosphere and land surface; time series and spatial statistics; machine learning and predictability; digital elevation models and watershed analysis; Lidar and GPS; uncertainty in lidar elevation estimates in coastal salt marshes; geographical information systems



Please see Google Scholar or ResearchGate for a list of my published works.


More Information

  • Curriculum Vitae
  • Personal website
  • Follow @JohnCallahan42 on Twitter
  • Delaware Resilient & Sustainable Communities League (RASCL), Science & Research Committee
  • Fifth National Climate Assessment (NCA5) Chapter Author (Coastal Effects)
  • US Climate Variability and Predictability Program (CLIVAR) Predictability, Predictions, and Applications Interface (PPAI) Panel
  • Delaware River Basin Commission (DRBC) Advisory Committee on Climate Change (ACCC)
  • Delaware State Hazard Mitigation Council
  • Chair of Delaware Sea-Level Rise Technical Committee (2015 – 2017)
  • American Meteorological Society (AMS)
  • American Geophysical Union (AGU)