Allan Frei

About

Allan Frei is a climatologist whose research interests have focused on the potential impact of climate change on hydrology, including snow cover and extreme storms and floods. Recent projects include an investigation of potential impacts of climate change on New York City’s water supply in collaboration with the New York City Department of Environmental Protection. Prof. Frei’s main educational interests have been in curriculum development for Environmental Studies and Physical Geography. Prof. Frei formerly served as Chair of the Department of Geography and Environmental Science at Hunter College, and currently serves as the advisor to Geography majors, and as a Deputy Director of the Institute for Sustainable Cities at Hunter College.

Department and Climate Courses

Department of Geography and Environmental Science
Weather and Climate
Earth System Science
Quantitative Techniques
Energy and Environment (co-teach)
Urban Water: Supply and Management (co-teach)
Data Analysis and Visualization in R (co-teach)

Climate Research

Climate Change, Climate Extremes, and New York City Water Supply
Nature-Based Solutions: Green Roofs and the surface energy and water balances

Citations

Selected Articles 2015-2024
Frei, Allan, 2023, Thermal Properties of green, white and other building roof materials and solar insolation: A case study in New York City, Building and Environment, V244, 110842, DOI: https://doi.org/10.1016/j.buildenv.2023.110842

Frei, Allan, Rajith Mukundan, Jie Chen, Rakesh Gelda, Emmet Owens, Jordan Gass, Arun Ravindranath, 2022, A cascading bias correction method for global climate model simulated multi-year precipitation variability, Journal of Hydrometeorology, V23(5), p. 697-713, DOI: 10.1175/JHM-D-21-0148.1

Chen, J., Li, X., Martel, J., Brissette, F.P., Zhang, X.J., & Frei, A., 2021. Relative Importance of Internal Climate Variability versus Anthropogenic Climate Change in Global Climate Change, Journal of Climate, 34(2), 465-478, https://journals.ametsoc.org/view/journals/clim/34/2/JCLI-D-20-0424.1.xml

Kelly-Voicu, P., Frei A., 2020, Hydrological and temperature variations between 1900 and 2016 in the Catskill Mountains, New York, USA, International Journal of Climatology, 40:1586-1606, DOI: 10.1002/joc.6289

Yeo M-H, Frei A, Gelda RK, Owens EM, 2019, A stochastic weather model for generating daily precipitation series at ungauged locations in the Catskill Mountain region of New York State. International Journal of Climatology, p. 1–19. https://doi.org/10.1002/joc.6230

Anandhi, Aavudai, Donald C. Pierson, and Allan Frei, 2019, Evaluation of Climate Model Performance for Water Supply Studies: Case Study for New York City, Journal of Water Resource Planning and Management, 145(8): 06019006

Suriano, Zachary, Daniel J. Leathers, Dorothy K. Hall, Allan Frei, 2019, Contribution of Snowfall from Diverse Synoptic Conditions in the Catskill/Delaware Watershed of New York State, International Journal of Climatology, V39, p.3608–3618, 10.1002/joc.6043
Mukundan, Rajith, Emmet Owens, Nachiketa Acharya, Allan Frei, Rakesh Gelda, 2019, Modeling streamflow sensitivity to climate change in New York City water supply streams using a stochastic weather generator, Journal of Hydrology: Regional Studies, V21, p. 147-158, DOI: 10.1016/j.ejrh.2019.01.001

Towey, K. L., J. F. Booth, A. Frei, and M. R. Sinclair, 2018: Track and Circulation Analysis of Tropical and Extratropical Cyclones that Cause Strong Precipitation and Streamflow Events in the New York City Watershed. J. Hydrometeor., 19, 1027 – 1042, doi: 10.1175/JHM-D-17-0199. https://journals.ametsoc.org/doi/full/10.1175/JHM-D-17-0199.1

Hall, Dorothy K., Allan Frei & Nicolo E. DiGirolamo, 2018, On the frequency of lake-effect snowfall in the Catskill Mountains, Physical Geography, DOI: 10.1080/02723646.2018.1440827

Frei, Allan and Petra Kelly-Voicu, 2017, Hurricane Irene and Tropical Storm Lee: how unusual were they in the Catskill Mountains?, Journal of Extreme Events, Vol. 4, No. 2 (2017) 1750009 (31 pages), DOI: 10.1142/S2345737617500099

Hall, Dorothy K., Nicolo E. DiGirolamo, Allan Frei, 2017 Contribution of Lake-Effect Snow to the Catskill Mountains Snowpack, Proceedings of the 74th Eastern Snow Conference, Ottawa, Ontario, Canada, June 2017

Acharya, Nachiketa, Allan Frei, Jie Chen, Leslie DeCristofaro, Emmet Owens, 2017, Evaluating stochastic precipitation generators for climate change impact studies of New York City’s primary water supply, Journal of Hydrometeorology, V18, p. 879-896, DOI: 10.1175/JHM-D-16-0169.1

Porter, James, Adao Matonse, Allan Frei, 2015, The New York City Operations Support Tool (OST): Managing water for millions of people in an era of changing climate and extreme hydrological events, Journal of Extreme Events, Vol. 2, No. 2 (2015) 1550008 (23 pages)

Frei, A., Kunkel Kenneth E., Matonse Adao, 2015, The Seasonal Nature of Extreme Hydrological Events in the Northeastern United States, Journal of Hydrometeorology, V16, No. 5, p. 2065-2085, doi:10.1175/JHM-D-14-0237.1