# overview
I study the mathematical and physical aspects of the climate system. I use computer models of varying degrees of complexity to analyze weather and climate phenomena. My recent research is focused on the following scientific questions:

- What is the influence of large-scale phenomena such as El Nino and the Atlantic Meridional Mode on tropical cyclone activity?

- Do swirling eddies in the ocean affect atmospheric storms in the middle latitudes?

- Can statistical and machine learning approaches be used to analyze the relationship between atmospheric state and rainfall?

My broader interests include philosophy of science, especially in the context of climate prediction, as well as the innovative use of computers for research and teaching.

# keywords[]
4009 Electronics, Sensors And Digital Hardware

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5102 Atomic, Molecular And Optical Physics

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4012 Fluid Mechanics And Thermal Engineering

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Moisture Transport Between The Ocean And Atmosphere

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Mesoscale Sea Surface Temperature Feedback To The Atmosphere

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3709 Physical Geography And Environmental Geoscience

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3709 Physical Geography And Environmental Geoscience

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3709 Physical Geography And Environmental Geoscience

# educationAndTraining[].organization.label
Princeton University - (Princeton, New Jersey, United States)

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Free and Forced Variability of the Tropical Atlantic Ocean: Role of the Wind-Evaporation-Sea Surface Temperature Feedback

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A study of tropical instability waves over the atlantic using a coupled regional atmosphere-ocean model

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Thermodynamic coupling and predictability of tropical sea surface temperature

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Edge effect correction formula for superspheroids using the Debye series.

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Predictability of linear coupled systems. Part I: Theoretical analyses

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The Influence of ENSO Flavors on Western North Pacific Tropical Cyclone Activity

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Statistical significance of trends in monthly heavy precipitation over the US

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The preconditioning role of Tropical Atlantic Variability in the development of the ENSO teleconnection: implications for the prediction of Nordeste rainfall

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Co-rotating stationary states and vertical alignment of geostrophic vortices with thin cores

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The role of the wind-evaporation-sea surface temperature (WES) feedback in air-sea coupled tropical variability

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Atmospheric low-frequency variability and its relationship to midlatitude SST variability: Studies using the NCAR Climate System Model

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Dynamics in Atmospheric Physics. By Richard Lindzen. Cambridge University Press. Pp. 310. 25 (hardback)

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Oceanic forcing of Sahel rainfall on interannual to interdecadal time scales.

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American Association for the Advancement of Science (AAAS)

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Dynamical elements of predicting boreal spring tropical Atlantic sea-surface temperatures

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Importance of Resolving Kuroshio Front and Eddy Influence in Simulating North Pacific Storm Track

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Effect of Atlantic Meridional Overturning Circulation on Tropical Atlantic Variability: A Regional Coupled Model Study

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A teleconnection between Atlantic sea surface temperature and eastern and central North Pacific tropical cyclones

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The role of ocean dynamics in producing decadal climate variability in the North Pacific

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An investigation of tropical Atlantic bias in a high-resolution coupled regional climate model

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Interaction between tropical Atlantic variability and El Nino-Southern Oscillation

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Variability of the South Atlantic convergence zone simulated by an atmospheric general circulation model

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The Response of Atlantic Tropical Cyclones to Suppression of African Easterly Waves

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Evaluation of a Coupled Modeling Approach for the Investigation of the Effects of SST Mesoscale Variability on the Atmosphere

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Tropical pacific and Atlantic climate variability in CCSM3

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Importance of Resolving Kuroshio Front and Eddy Influence in Simulating the North Pacific Storm Track

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A Modeling Strategy for the Investigation of the Effect of Mesoscale SST Variability on Atmospheric Dynamics

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Midlatitude Mesoscale Ocean-Atmosphere Interaction and Its Relevance to S2S Prediction

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Sensitivity of the thermohaline circulation to surface buoyancy forcing in a two-dimensional ocean model

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On the. role of the south Atlantic atmospheric circulation in tropical Atlantic variability

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The Role of the Wind-Evaporation-Sea Surface Temperature (WES) Feedback as a Thermodynamic Pathway for the Equatorward Propagation of High-Latitude Sea Ice-Induced Cold Anomalies

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Distant Influence of Kuroshio Eddies on North Pacific Weather Patterns?

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The response of atmospheric heat transport to zonally-averaged SST trends

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On the interpretation of Caribbean paleo-temperature reconstructions during the Younger Dryas

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HURRICANES AND CLIMATE The US CLIVAR Working Group on Hurricanes

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The preconditioning role of the tropical Atlantic in the El Nio/Southern Oscillation's impact on Northeast Brazil rainfall variability

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Climate Impacts of CALIPSO-Guided Corrections to Black Carbon Aerosol Vertical Distributions in a Global Climate Model

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The three-dimensional structure of breaking Rossby waves in the polar wintertime stratosphere

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Ocean barrier layers' effect on tropical cyclone intensification.

# publications[].publisher
Proceedings of the National Academy of Sciences

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3-DIMENSIONAL QUASI-GEOSTROPHIC CONTOUR DYNAMICS, WITH AN APPLICATION TO STRATOSPHERIC VORTEX DYNAMICS

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Degree of simulated suppression of Atlantic tropical cyclones modulated by flavour of El Nino

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MULTIPLE EQUILIBRIA, NATURAL VARIABILITY, AND CLIMATE TRANSITIONS IN AN IDEALIZED OCEAN-ATMOSPHERE MODEL

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PIRATA: A Sustained Observing System for Tropical Atlantic Climate Research and Forecasting

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An Unprecedented Set of High-Resolution Earth System Simulations for Understanding Multiscale Interactions in Climate Variability and Change

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Tropical Pacific Ocean Dynamical Response to Short-Term Sulfate Aerosol Forcing

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A MULTIWAVE MODEL OF THE QUASI-BIENNIAL OSCILLATION

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The Impact of the El Nino-Southern Oscillation and Atlantic Meridional Mode on Seasonal Atlantic Tropical Cyclone Activity

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Pacific meridional mode and El Nino-southern oscillation

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Statistical and Machine Learning Methods Applied to the Prediction of Different Tropical Rainfall Types.

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The effect of local sea surface temperatures on atmospheric circulation over the tropical Atlantic sector

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Effect of Atlantic Meridional Overturning Circulation Changes on Tropical Atlantic Sea Surface Temperature Variability: A 2 1/2-Layer Reduced-Gravity Ocean Model Study

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Thermodynamic coupling and predictability of tropical sea surface temperature

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Improved Simulations of Atmospheric River Climatology and Variability in High-Resolution CESM

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Simulated precipitation response to SST forcing and potential predictability in the region of the South Atlantic convergence zone

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Central American mountains inhibit eastern North Pacific seasonal tropical cyclone activity.

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Influence of Mean Flow on the ENSO-Vertical Wind Shear Relationship over the Northern Tropical Atlantic

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North Atlantic climate variability: Phenomena, impacts and mechanisms

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High-Resolution Tropical Channel Model Simulations of Tropical Cyclone Climatology and Intraseasonal-to-Interannual Variability

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Advective ocean-atmosphere interaction: An analytical stochastic model with implications for decadal variability

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A hybrid coupled model study of tropical Atlantic variability

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Chaos in a periodically forced Lorenz system.

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Decadal variability and predictability in the midlatitude ocean-atmosphere system

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Predictive Statistical Representations of Observed and Simulated Rainfall Using Generalized Linear Models.

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Oceanic mixed layer feedback and Tropical Atlantic variability

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Interdecadal interactions between the tropics and midlatitudes in the Pacific basin

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EQUATORIAL SUPERROTATION AND MAINTENANCE OF THE GENERAL-CIRCULATION IN 2-LEVEL MODELS

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Stochasticity and spatial resonance in interdecadal climate fluctuations

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The effects of North Atlantic SST and sea ice anomalies on the winter circulation in CCM3. Part II: Direct and indirect components of the response

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Satellite-Observed Precipitation Response to Ocean Mesoscale Eddies

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Predictability of linear coupled systems. Part II: An application to a simple model of tropical Atlantic variability

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Winter Extreme Flux Events in the Kuroshio and Gulf Stream Extension Regions and Relationship with Modes of North Pacific and Atlantic Variability

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Ocean fronts and eddies force atmospheric rivers and heavy precipitation in western North America.

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Dynamics of the boreal summer African monsoon in the NSIPP1 atmospheric model

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Origins of the midlatitude Pacific decadal variability

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The cause of the fragile relationship between the Pacific El Nio and the Atlantic Nio.

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Impact of Atlantic SST and high frequency atmospheric variability on the 1993 and 2008 Midwest floods: Regional climate model simulations of extreme climate events

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The effects of North Atlantic SST and sea ice anomalies on the winter circulation in CCM3. Part I: Main features and storm track characteristics of the response

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Global multivariate point pattern models for rain type occurrence.

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Seasonal-to-decadal prediction using climate models: successes and challenges

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Tropical Atlantic seasonal predictability: The roles of El Nino remote influence and thermodynamic air-sea feedback

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Asian pollution climatically modulates mid-latitude cyclones following hierarchical modelling and observational analysis.

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HURRICANES AND CLIMATE: THE U.S. CLIVAR WORKING GROUP ON HURRICANES (vol 96, pg 997, 2015)

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The Barrier Layer of the Atlantic warm pool: Formation mechanism and influence on the mean climate

# researcherOn[].label
Investigation of the Effects of Oceanic Mesoscale Eddies on the Midlatitude Storm Tracks and Their Predictability

# researcherOn[].awardedBy.label
National Oceanic and Atmospheric Administration - (Washington D.C., District of Columbia, United States)

# researcherOn[].awardedBy.label
United States Department of Energy - (Washington D.C., District of Columbia, United States)

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DOE - Collaborative Research: Impacts of Aerosols and Air-Sea Interaction On Community Earth System Model (CESM) Biases In the Western Pacific Warm Pool Region

# researcherOn[].awardedBy.label
United States Department of Energy - (Washington D.C., District of Columbia, United States)

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Assessing the influence of background state and climate variability on tropical cyclones using initialized ensembles and mesh refinement in E3SM

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United States Department of Energy - (Washington D.C., District of Columbia, United States)

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The Impact of Canonical and Non-canonical El Niño and the Atlantic Meridional Mode on Atlantic Tropical Cyclones

# researcherOn[].awardedBy.label
National Science Foundation - (Arlington, Virginia, United States)

# researcherOn[].label
A Study of Frontal-Scale Air-Sea Interaction Along the Gulf Stream Extension Using A High-Resolution Coupled Regional Climate

# researcherOn[].awardedBy.label
National Science Foundation - (Arlington, Virginia, United States)

# researcherOn[].label
Role of Ocean Mesoscale Eddy Atmosphere Feedback in North Pacific and Atlantic Climate Variability: A High-Resolution Regional Climate Model Study

# researcherOn[].awardedBy.label
National Science Foundation - (Arlington, Virginia, United States)

# streetAddress
Texas A&M University; Meteorology; 3150 TAMU

# inTheNews[].label
Keppel-Aleks, Swann, and Xu Receive 2019 Global Environmental Change Early Career Award

# etdChairOf[].label
Zhu, Xiaojie (2013-05). Influence of Mean State on Climate Variability at Interannual and Decadal Time Scales. Doctoral Dissertation.

# etdChairOf[].label
Steinweg-Woods, Jesse Matthew (2016-04). A Lagrangian Analysis of Midlatitude Air-Sea Interaction Associated with Mesoscale Oceanic Eddies. Doctoral Dissertation.