Alex Hall

Professor

Department of Atmospheric and Oceanic Sciences


Atmos & Ocean Sci
7955 MSB
Los Angeles, CA 90095

Center for Climate Science

Climate Sensitivity Research Lounge

Department of Atmospheric and Oceanic Sciences

Curriculum Vitae

Bio

Alex Hall’s research is focused on reducing uncertainties associated with global climate change and involves a global perspective on earth’s climate. The overarching goal of his global climate research is to determine what controls the climate’s sensitivity to external forcing. His work also focuses on developing regional earth system models and studying the climate from a regional perspective to lay the groundwork for an understanding of climate change at scales most relevant to people and ecosystems.

Projects

The Future of Extreme Precipitation in California

Our researchers are investigating the effects of climate change on heavy precipitation events in the state. Specifically, we're focusing on atmospheric rivers, moisture-laden filaments of air that move across oceans and produce heavy precipitation when they make landfall. Understanding how atmospheric rivers are affected in a changing climate is key to smart water planning in the future.

Developing Metrics to Evaluate the Skill and Credibility of Downscaling

Within the climate science community, a variety of techniques are used to "downscale" information from global climate models and produce fine-scale projections of future climate, but the relative strengths and weaknesses of these techniques are not well-understood. In this project, we are comparing downscaling techniques and establishing best practices.

Los Angeles Skyline

Climate Change in the Los Angeles Region

The most comprehensive study of climate change in LA to date, the Climate Change in the Los Angeles Region Project was conducted by Center for Climate Science Faculty Director Alex Hall and his research group between 2010 and 2015. Dr. Hall and his team developed a novel method for bringing global climate model projections to high spatial resolution, creating neighborhood-by-neighborhood projections of future climate over the greater Los Angeles region under different scenarios of greenhouse gas emissions.

Sierra Nevada

Climate Change in the Sierra Nevada

Using an innovative technique to produce high-resolution future climate projections, our team is answering key questions about the fate of the Sierra Nevada snowpack, a critical natural resource that not only supports an iconic ecosystem but also provides freshwater to millions of Californians.

Publications

Anthropogenic Warming Impacts on California Snowpack During Drought

N. Berg and A. Hall

Published Work | 2017 | Geophysical Research Letters


Incorporating Snow Albedo Feedback Into Downscaled Temperature and Snow Cover Projections for California’s Sierra Nevada

D.B. Walton, A. Hall, N. Berg, M. Schwartz, F. Sun

Published Work | 2017 | Journal of Climate


California Winter Precipitation Change under Global Warming in the Coupled Model Intercomparison Project Phase 5 Ensemble

David Neelin, Baird Langenbrunner, Joyce Meyerson, Alex Hall, Neil Berg

Published Work | 2013 | American Meteorological Society


El Nio-Southern Oscillation impacts on winter winds over Southern California

Neil Berg, Alex Hall, Scott Capps, Mimi Hughes

Published Work | Journal of Climate Dynamics



Accumulation and melt dynamics of snowpack from a multiresolution regional climate model in the central Sierra Nevada, California

T. Pavelsky, S. Kapnick, A. Hall

Published Work | Journal of Geophysical Research-Atmospheres



A Hybrid Dynamical-Statistical Downscaling Technique, Part I: Development and Validation of the Technique.

D.B. Walton, F. Sun, A. Hall, and S.C. Capps

Published Work | Journal of Climate