Atmospheric general circulation; modern and paleo climate dynamics; a process / mechanistic-based understanding of climate variability and change; statistical methods; climate and society
My research interests are generally in the area of climate dynamics and, somewhat more specifically, on the range of processes that influence the large-scale atmospheric circulations. My overall research activities are currently organized into the following four research themes:
1) Processes in the three-dimensional budget of atmospheric momentum: Some common approaches to characterizing variability and change oversimplify and blur the richness of three-dimensional structures in the atmospheric flow. My research interest in this area is to objectively focus our view of regional and global-scale atmospheric variability and change over a wide range of time scales using observations and climate model experiments. A key motivation is to ascribe physical interpretations to associated spatial and temporal variability in the atmospheric momentum budget.
2) Enhancing our mechanistic understanding of ocean-ice-atmosphere interactions: Observations and many climate model projections of the future indicate a number of consistent changes to various components of the anthropogenically-forced coupled climate system (e.g., Arctic sea ice, storm tracks, ocean circulation). Investigating the temporal covariabiilty is a necessary first step to explore interesting interactions, but is insufficient to explore mechanistic interactions between different climate system components. My research interest in this area applies additional analysis constraints to more clearly examine physical processes associated with these interactions.
3) Climate dynamics in a paleo context: Past changes to the geography, topography, bathymetry, and atmospheric composition led to fundamental reorganizations of the climate system in general and to the atmospheric circulation in particular. By investigating robust indicators of paleoclimate from proxy-based records and comparing these with fully-coupled model experiments, we can explore not only the climates of the distant past, but also our own understanding of modern and future climate system sensitivity. My research interest in this area is focused on large paleoclimate changes implied by proxy indicators and on model experiments with very different radiative properties. My goal in this work is to examine the robustness of our observationally-based understanding of the atmospheric general circulation.
4) Climate, society, and efficient public policy: Climate variability and change imply a sequence of costs and benefits that accrue to different stakeholders at disparate points in time. Climate mitigation and/or adaptation policies also convey time-varying social costs (or benefits), but are designed to decrease the negative (or increase the positive) impacts of climate variability and change. In this simple framework, economically-efficient climate policy would consider the net present value of these two streams of costs and benefits to deliver the overall least-cost (or greatest-benefit) societal outcome. My research in this area applies various methods to explore coupled climate-economic interactions in a variety of managed systems using observations and models. This work is inherently collaborative and greatly enriched by partnerships with experts in related fields.
Atmospheric jet variability: Linking Structure, Evolution, and Mechanisms (jetSTREAM), in collaboration with PI Camille Li
Trans-Arctic Change: Extending Interdisciplinary Collaborations on the Environment (TRACEICE), in collaboration with co-PI Lars Henrik Smedsrud
If you are a prospective graduate student or post-doc and are interested in research related to the categories above (or in atmospheric science in general), please feel free to get an overview of our program here or make contact with me directly.
Ph.D. Atmospheric Sciences, University of Washington (2007)
M.P.A. Evans School of Public Affairs, University of Washington (2007)
M.S. Atmospheric Sciences, University of Washington (2003)
M.S. Environmental Engineering and Science, Stanford University (1998)
B.S. Environmental Engineering, University of Oklahoma (1997)
Francesco S. R. Pausata, Ph.D. (2010) Geophysical Institute, University of Bergen [co-advisor]
Kristen Ravnestad, M.S. (2010) Geophysical Institute, University of Bergen [co-advisor]
Solbjørg Apeland, M.S. (2010) Geophysical Institute, University of Bergen [co-advisor]
Svetlana A. Sorokina, Ph.D. (2014) Geophysical Institute, University of Bergen [co-advisor]
Joshua Cuzzone, Ph.D. (2014) CEOAS, Oregon State University [committee member]
Michael (Mike) Kula, M.S. student: CEOAS, Oregon State University [primary advisor]
Sihan (Meredith) Li, Ph.D. student: CEOAS, Oregon State University [committee member]
Stefan Keiderling, Ph.D. student (stipendiat): Geophysical Institute, University of Bergen [committee member]
Kathie Dello, Ph.D. student: School of Public Policy, Oregon State University [committee member]
Adjunct Associate Professor in Large-scale Atmospheric Dynamics: Geophysical Institute, University of Bergen (Norway)
Affiliate faculty: School of Public Policy (Oregon State University)
Affiliate faculty: Water Resources Graduate Program (Oregon State University)
Student publications are underlined.
# denotes that these authors contributed equally to the publication
Ciasto, L.M., C. Li, J.J. Wettstein, and N.G. Kvamstø. North Atlantic Storm Track Sensitivity to Projected Sea Surface Temperatures: Local Versus Remote Influences. Submitted: Journal of Climate.
Sorokina, S. A., # C. Li, # J.J. Wettstein, and N.G. Kvamstø, 2016. Two-way Coupling Between Barents Sea Ice and Anomalous Eurasian Winters. Journal of Climate 29: 495-511. DOI: 10.1175/JCLI-D-15-0046.1
Wettstein, J.J. and C. Deser, 2014. Internal Variability in Projections of Twenty-First-Century Arctic Sea Ice Loss: Role of the Large-Scale Atmospheric Circulation. Journal of Climate 27: 527-550. DOI: 10.1175/JCLI-D-12-00839.1
# Li, C. and # J.J. Wettstein, 2012. Thermally-driven and Eddy-driven Jet Variability in Reanalysis. Journal of Climate, 25: 1587-1596. DOI: 10.1175/JCLI-D-11-00145.1
Wettstein, J.J., J.S. Littell, J.M. Wallace and Z. Gedalof, 2011. Coherent Region-, Species- and Frequency-Dependent Local Climate Signals in Northern Hemisphere Tree-Ring Widths. Journal of Climate, 24: 5998-6012. DOI: 10.1175/2011JCLI3822.1
Pausata, F.S.R., C. Li, J.J. Wettstein, M. Kageyama and K.H. Nisancioglu, 2011. The Key Role of Topography in Altering North Atlantic Atmospheric Circulation during the Last Glacial Period. Climate of the Past, 7: 1089-1101. DOI: 10.5194/cp-7-1089-2011
Athanasiadis, P.J., J.M. Wallace and J.J. Wettstein, 2010. Patterns of Wintertime Jet Stream Variability and their Relation to the Storm Tracks. Journal of the Atmospheric Sciences 67: 1361-1381. DOI: 10.1175/2009JAS3270.1
Wettstein, J.J. and J.M. Wallace, 2010. Observed Patterns of Month-to-Month Storm Track Variability and their Relationship to the Background Flow. Journal of the Atmospheric Sciences 67: 1420-1437. DOI: 10.1175/2009JAS3194.1
Pausata, F.S.R., C. Li, J.J. Wettstein, K.H. Nisancioglu and D.S. Battisti, 2009. Changes in Atmospheric Variability in a Glacial Climate and the Impacts on Proxy Data: A Model Intercomparison. Climate of the Past 5: 489-502. DOI: 10.5194/cp-7-1089-2011
Wettstein, J.J. and L.O. Mearns, 2002. The Influence of the North Atlantic--Arctic Oscillation on Mean, Variance and Extremes of Temperature in the Northeastern United States and Canada. Journal of Climate 15: 3586-3600. DOI: 10.1175/1520-0442