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Andrew W. Ellis

Professor and Director of Graduate Studies
Andrew W. Ellis
227 Wallace Hall


·     Climate science, meteorology

·     Hydroclimatic variability/change, snow, drought, water supply

·     Synoptic climate applications in hydroclimatology and meteorology

I am a native of Delaware and earned Bachelor of Arts (Geography, 1991), Master of Science (Geography, 1994), and Doctor of Philosophy (Climatology, 1997) degrees from the Geography program at the University of Delaware in Newark, Delaware.  In 1997, I joined the geography faculty at Arizona State University in Tempe, Arizona where I remained until leaving for Virginia Tech in July 2011. A hydroclimate scientist, my early research work focused on snowfall variability, snow cover-atmosphere interactions, and snow melt modeling. However, I spent several years working on lower atmospheric pollution problems before returning in recent years to a research agenda focused on water-related issues. Two research areas have been the focus of my most recent work. One area centers on understanding the occurrence of drought and its improved representation for monitoring and study. The second research area focuses on assessing the sustainability of fresh water resources for populations living in arid and semi-arid climates given population growth and the uncertain hydrological impacts of climate change.

Courses Regularly Taught:

·     Introduction to Earth’s Climate (GEOG 1524)

·     Dynamic Meteorology I (GEOG 3515)

·     Dynamic Meteorology II (GEOG 3516)

Recent Publications:

Marston ML, AW Ellis. 2021. Regional-scale variability and change in daily precipitation across the contiguous United States, 1949-2018. International Journal of Climatology.

Marston ML, AW Ellis. 2020. Delineating precipitation regions of the contiguous United States from cluster analyzed gridded data. Annals of the American Association of Geographers.

Ellis AW, ML Marston. 2020: Late 1990s cool season climate shift in eastern North America. Climatic Change.

Ellis AW, ML Marston, J Bahret. 2020: Changes in the frequency of cool season lake-effects within the North American Great Lakes region. Annals of the American Association of Geographers.

Marston ML, AW Ellis. 2019: Uniformity in the temporal distribution of precipitation through seasonal and annual timeframes across the Mid-Atlantic region of the United States, 1950-2017. Climate Research, 78, 69-81.

Ellis AW, T Greene. 2019: Synoptic climate evidence of a late-twentieth century change to earlier spring ice-out on Maine lakes, USA. Climatic Change, 153(3), 323-339.

Murphy KW, AW Ellis. 2019: An Analysis of Past and Present Megadrought Impacts Upon a Modern Water Resource System. Hydrological Sciences Journal, 64(1), 45-65.