# overview
I study the physics of the climate system and extreme weather, the climate-energy nexus, health impacts of climate change and extreme weather, and climate change policy.

# keywords[]
Cloud-Aerosol Lidar And Infrared Pathfinder Satellite Observations (CALIPSO)

# keywords[]
5102 Atomic, Molecular And Optical Physics

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Clouds And Earth's Radiant Energy System (CERES) Observations

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4101 Climate Change Impacts And Adaptation

# educationAndTraining[].organization.label
Harvard University - (Cambridge, Massachusetts, United States)

# awardsAndHonors[].label
Association of Former Students College-Level Teaching Distinguished Achievement Award, The

# publications[].label
The Effect of Forced and Unforced Variability on Heat Waves, Temperature Extremes, and Associated Population Risk in a CO2-Warmed World

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Statistical Properties of Horizontally Oriented Plates in Optically Thick Clouds From Satellite Observations

# publications[].publisher
Institute of Electrical and Electronics Engineers (IEEE)

# publications[].label
Effects of tropical deep convection on interannual variability of tropical tropopause layer water vapor

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The response of stratospheric water vapor to climate change driven by different forcing agents

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Study of Horizontally Oriented Ice Crystals with CALIPSO Observations and Comparison with Monte Carlo Radiative Transfer Simulations

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A test of the partitioning between ClO and ClONO<inf>2</inf> using simultaneous UARS measurements of ClO, NO<inf>2</inf>, and ClONO<inf>2</inf>

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Cloud and Aerosol Distributions From SAGE III/ISS Observations

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MEASUREMENTS OF WATER-VAPOR IN THE TROPICAL LOWER STRATOSPHERE DURING THE CEPEX CAMPAIGN - RESULTS AND INTERPRETATION

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

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SIMULTANEOUS, INSITU MEASUREMENTS OF OH, HO2, O3, AND H2O - A TEST OF MODELED STRATOSPHERIC HOX CHEMISTRY

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UARS/MLS cloud ice measurements: Implications for H2O transport near the tropopause

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The Science and Politics of Global Climate Change

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Instantaneous cloud overlap statistics in the tropical area revealed by ICESat/GLAS data

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Multimodel analysis of the water vapor feedback in the tropical upper troposphere

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A test of the partitioning between ClO and ClONO2 using simultaneous UARS measurements of ClO, NO2, and ClONO2

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Lower stratospheric chlorine partitioning during the decay of the Mt Pinatubo aerosol cloud

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Estimates of the Water Vapor Climate Feedback during El Nino-Southern Oscillation

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Tropopause-level thin cirrus coverage revealed by ICESat/Geoscience Laser Altimeter System

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Erythemal Radiation, Column Ozone, and the North American Monsoon

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Evolution of the Climate Forcing During the Two Years After the Hunga TongaHunga Ha'apai Eruption

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The influence of internal variability on Earth's energy balance framework and implications for estimating climate sensitivity

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Climate Change Increases Energy Demand and Cost in Texas

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CLIMATE AND CLIMATE CHANGE | Climate Feedbacks

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SPADE H2O MEASUREMENTS AND THE SEASONAL CYCLE OF STRATOSPHERIC WATER-VAPOR

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Comment on "A reexamination of the 'stratospheric fountain' hypothesis" by A. E. Dessler - Reply

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The Estimated Climate Impact of the Hunga Tonga-Hunga Ha & apos;apai Eruption Plume

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An Estimate of Equilibrium Climate Sensitivity From Interannual variability

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Transport of ice into the stratosphere and the humidification of the stratosphere over the 21st century.

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Suppression of deep convection over the tropical North Atlantic by the Saharan Air Layer

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Large anomalies in lower stratospheric water vapour and ice during the 2015-2016 El Nino

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Simulation of stratospheric water vapor and trends using three reanalyses

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Variations of stratospheric water vapor over the past three decades

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The True Cost of Heat: Evaluating Heat-Related Mortality Estimation Methods in Texas.

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Frequency of tropical precipitating clouds as observed by the Tropical Rainfall Measuring Mission Precipitation Radar and ICESat/Geoscience Laser Altimeter System

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Water-vapor climate feedback inferred from climate fluctuations, 2003-2008

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Comment on "A reexamination of the 'stratospheric fountain' hypothesis" by A. E. Dessler

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A model of HDO in the tropical tropopause layer

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Trends in tropospheric humidity from reanalysis systems

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A Radiative-Convective Equilibrium Perspective of Weakening of the Tropical Walker Circulation in Response to Global Warming

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Greater committed warming after accounting for the pattern effect

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Improved Surface Urban Heat Impact Assessment Using GOES Satellite Data: A Comparative Study With ERA-5

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Cloud and Aerosol Distributions from SAGE III/ISS Observations

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Testing chemistry-climate models' regulation of tropical lower-stratospheric water vapor

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Long-term variability in Saharan dust transport and its link to North Atlantic sea surface temperature

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Clouds and water vapor in the Northern Hemisphere summertime stratosphere

# publications[].label
The influence of internal variability on Earth's energy balance framework and implications for estimating climate sensitivity

# publications[].label
Estimation of the cirrus cloud scattering phase function from satellite observations

# publications[].label
The Effect of Forced and Unforced Variability on Heat Waves, Temperature Extremes, and Associated Population Risk in a CO₂-Warmed World

# publications[].label
Observations of Climate Feedbacks over 2000-10 and Comparisons to Climate Models

# publications[].label
A determination of the cloud feedback from climate variations over the past decade.

# publications[].publisher
American Association for the Advancement of Science (AAAS)

# publications[].label
A new approach to retrieving cirrus cloud height with a combination of MODIS 1.24-and 1.38-mu m channels

# publications[].label
The response of stratospheric water vapor to climate change driven by different forcing agents

# publications[].label
A reexamination of the "stratospheric fountain" hypothesis

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AN EXAMINATION OF THE TOTAL HYDROGEN BUDGET OF THE LOWER STRATOSPHERE

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Influence of convection on stratospheric water vapor in the North American monsoon region

# publications[].label
Tropical cloud-top height distributions revealed by the Ice, Cloud, and Land Elevation Satellite (ICESat)/Geoscience Laser Altimeter System (GLAS)

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Distribution and Radiative Forcing of Tropical Thin Cirrus Clouds

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The impact of gravity waves and cloud nucleation threshold on stratospheric water and tropical tropospheric cloud fraction

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The Impact of Neglecting Climate Change and Variability on ERCOT's Forecasts of Electricity Demand in Texas

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Chemistry and Physics of Stratospheric Ozone

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Comparisons between measurements and models of Antarctic ozone loss

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A model for transport across the tropical tropopause

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Water Vapor, Clouds, and Saturation in the Tropical Tropopause Layer.

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An Assessment of Climate Feedbacks in Observations and Climate Models Using Different Energy Balance Frameworks

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Evaluating Cloud Feedback Components in Observations and Their Representation in Climate Models

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Convective Hydration of the Upper Troposphere and Lower Stratosphere

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Estimating Transient Climate Response in a Large-Ensemble Global Climate Model Simulation

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MECHANISMS CONTROLLING WATER-VAPOR IN THE LOWER STRATOSPHERE - A TALE OF 2 STRATOSPHERES

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Persistent high latitude amplification of the Pacific Ocean over the past 10 million years.

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The impact of forcing efficacy on the equilibrium climate sensitivity

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Aviation-climate change research initiative (ACCRI) subject specific white paper (SSWP) on contrails/cirrus optics and radiation SSWP# VI, January 22, 2008

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An Analysis of the Short-Term Cloud Feedback Using MODIS Data

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The relationship between interannual and long-term cloud feedbacks

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Nitrogen partitioning in the middle stratosphere as observed by the Upper Atmosphere Research Satellite

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Modeling upper tropospheric and lower stratospheric water vapor anomalies

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An analysis of the dependence of clear-sky top-of-atmosphere outgoing longwave radiation on atmospheric temperature and water vapor

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The distribution of tropical thin cirrus clouds inferred from terra MODIS data

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Test of the Fixed Anvil Temperature Hypothesis

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The effects of convection on the summertime mid-latitude overworld

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BALLOON-BORNE IN-SITU MEASUREMENTS OF CLO AND OZONE - IMPLICATIONS FOR HETEROGENEOUS CHEMISTRY AND MIDLATITUDE OZONE LOSS

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The status of publishing AGU journals electronically

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Impact of convectively lofted ice on the seasonal cycle of tropical lower stratospheric water vapor

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THE DIURNAL-VARIATION OF HYDROGEN, NITROGEN, AND CHLORINE RADICALS - IMPLICATIONS FOR THE HETEROGENEOUS PRODUCTION OF HNO2

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Bulk properties of isentropic mixing into the tropics in the lower stratosphere

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Potential Problems Measuring Climate Sensitivity from the Historical Record

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Observations of deep convection in the tropics using the Tropical Rainfall Measuring Mission (TRMM) precipitation radar

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The impact of temperature resolution on trajectory modeling of stratospheric water vapour

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Response of Aerosol Direct Radiative Effect to the East Asian Summer Monsoon

# publications[].publisher
Institute of Electrical and Electronics Engineers (IEEE)

# publications[].label
The influence of thermodynamic phase on the retrieval of mixed-phase cloud microphysical and optical properties in the visible and near-infrared region

# publications[].publisher
Institute of Electrical and Electronics Engineers (IEEE)

# publications[].label
Convective mixing near the tropical tropopause: Insights from seasonal variations

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Interhemispheric asymmetry in the 1 mbar O-3 trend: An analysis using an interactive zonal mean model and UARS data

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An analysis of the regulation of tropical tropospheric water vapor

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Impacts of the Unforced Pattern Effect on the Cloud Feedback in CERES Observations and Climate Models

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Water vapor feedback in the tropical upper troposphere: Model results and observations

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An estimate of equilibrium climate sensitivity from interannual variability

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Impact of convectively lofted ice on the seasonal cycle of water vapor in the tropical tropopause layer

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Future Temperature-Related Deaths in the U.S.: The Impact of Climate Change, Demographics, and Adaptation.

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Cloud formation, convection, and stratospheric dehydration

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Cloud variations and the Earth's energy budget

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The effect of deep, tropical convection on the tropical tropopause layer

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Modeling upper tropospheric and lower stratospheric water vapor anomalies

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Contribution of different processes to changes in tropical lower-stratospheric water vapor in chemistry-climate models

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Regulation of H2O and CO in tropical tropopause layer by the Madden-Julian oscillation

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Principal component analysis of the evolution of the Saharan air layer and dust transport: Comparisons between a model simulation and MODIS and AIRS retrievals

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Selected science highlights from the first 5 years of the Upper Atmosphere Research Satellite (UARS) program

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Simulations of tropical upper tropospheric humidity

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Effect of convection on the summertime extratropical lower stratosphere

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Effects of convective ice evaporation on interannual variability of tropical tropopause layer water vapor

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Cirrus feedback on interannual climate fluctuations

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A model of HDO in the tropical tropopause layer

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CONTRAILS AND INDUCED CIRRUS Optics and Radiation

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Observations of convective cooling in the tropical tropopause layer in AIRS data

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Observations of deep convective influence on stratospheric water vapor and its isotopic composition

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The instability associated with the cross-Atlantic transport of Saharan dust and its meteorological implications

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Influence of convection on stratospheric water vapor in the North American Monsoon region

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Earth's Energy Imbalance More Than Doubled in Recent Decades

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Estimating Transient Climate Response in a large-ensemble global climate model simulation

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IN-SITU OBSERVATIONS IN AIRCRAFT EXHAUST PLUMES IN THE LOWER STRATOSPHERE AT MIDLATITUDES

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Characterizing unforced decadal climate variability in global climate model large ensembles

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Effects of convective ice lofting on H2O and HDO in the tropical tropopause layer

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Clouds and water vapor in the Northern Hemisphere summertime stratosphere

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Atmospheric science. A matter of humidity.

# publications[].publisher
American Association for the Advancement of Science (AAAS)

# publications[].label
BALLOON-BORNE MEASUREMENTS OF CLO, NO, AND O3 IN A VOLCANIC CLOUD - AN ANALYSIS OF HETEROGENEOUS CHEMISTRY BETWEEN 20 AND 30 KM

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Satellite observations of temporary and irreversible denitrification

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NEW FAST-RESPONSE PHOTOFRAGMENT FLUORESCENCE HYGROMETER FOR USE ON THE NASA ER-2 AND THE PERSEUS REMOTELY PILOTED AIRCRAFT

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Five-Year Climatology of Midtroposphere Dry Air Layers in Warm Tropical Ocean Regions as Viewed by AIRS/Aqua

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The effects of tropical cirrus clouds on the abundance of lower stratospheric ozone

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Analysis of the correlations between atmospheric boundary-layer and free-tropospheric temperatures in the tropics

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The impact of temperature vertical structure on trajectory modeling of stratospheric water vapor

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MEASUREMENTS OF STRATOSPHERIC CARBON-DIOXIDE AND WATER-VAPOR AT NORTHERN MIDLATITUDES - IMPLICATIONS FOR TROPOSPHERE-TO-STRATOSPHERE TRANSPORT

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Simulation of stratospheric water vapor and trends using three reanalyses

# publications[].label
Determination of the amount of water vapor entering the stratosphere based on Halogen Occultation Experiment (HALOE) data

# publications[].label
The effect of forced change and unforced variability in heat waves, temperature extremes, and associated population risk in a CO2-warmed world

# publications[].label
Impact of dataset choice on calculations of the short-term cloud feedback

# publications[].label
UARS measurements of ClO and NO2 at 40 and 46 km and implications for the model ''ozone deficit''

# publications[].label
THE DISTRIBUTION OF HYDROGEN, NITROGEN, AND CHLORINE RADICALS IN THE LOWER STRATOSPHERE - IMPLICATIONS FOR CHANGES IN O(3) DUE TO EMISSION OF NO(Y) FROM SUPERSONIC AIRCRAFT

# publications[].label
Trajectory model simulations of ozone and carbon monoxide in the Upper Troposphere and Lower Stratosphere (UTLS)

# publications[].label
Analysis of cirrus in the tropical tropopause layer from CALIPSO and MLS data: A water perspective

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On the control of stratospheric humidity

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Trajectory model simulations of ozone (O-3) and carbon monoxide (CO) in the lower stratosphere

# publications[].label
Comment on "Balloon-borne observations of water vapor and ozone in the tropical upper troposphere and lower stratosphere" by H. Vomel et al.

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Maintenance of Lower Tropospheric Temperature Inversion in the Saharan Air Layer by Dust and Dry Anomaly

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An Assessment of Climate Feedbacks in Observations and Climate Models Using Different Energy Balance Frameworks

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CORRELATED OBSERVATIONS OF HCL AND CLONO2 FROM UARS AND IMPLICATIONS FOR STRATOSPHERIC CHLORINE PARTITIONING

# researcherOn[].label
Mechanisms Regulating Water Vapor And Clouds in the Tropical and Extratropical Lower Stratosphere

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

# researcherOn[].label
NRS / NASA Earth and Space Science Fellowship (NESSF) Program - 2014-( Prev title: Nasa-Earth and Space Science Fellowship 2012)

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

# researcherOn[].label
Using trajectory calculations to study mass and trace gas transport into the stratosphere

# researcherOn[].awardedBy.label
Johnson Space Center - (Houston, Texas, United States)

# researcherOn[].label
Using SAGEIII Measurements and Numerical Models to Investigate Aerosol, Cloud, and Water-Vapor Physical Processes in the Upper Troposphere/Lower Stratosphere Region

# researcherOn[].awardedBy.label
Ames Research Center - (Mountain View, California, United States)

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

# researcherOn[].label
Understanding transport of mass, water vapor, and tropospheric pollutants into the stratosphere

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

# researcherOn[].label
Assessing the Impact of TTL Cirrus on the Climate System - CloudSat and CALIPSO Science Team Recompete/ROSES-2015

# researcherOn[].awardedBy.label
Langley Research Center - (Hampton, Virginia, United States)

# researcherOn[].label
Using Large Ensemble Simulations from Multiple Global Climate Models to Quantify the Internal Decadal Climate Variability

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

# researcherOn[].label
Understanding Long-Term Variations in Stratospheric Water Vapor

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

# researcherOn[].label
Measurements of Cloud Radiative Impact On the Climate Using Calipso, Cloudsat, and Other A-Train Sensors

# researcherOn[].awardedBy.label
National Aeronautics and Space Administration - (Washington D.C., District of Columbia, 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

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Green Daily: The Making of Worst-Case Climate Scenarios

# inTheNews[].label
Texas A&M Scientists: Record Antarctic Heat Reflects Current, Future Climate Trends

# inTheNews[].label
Scientists Predict an ‘Above Normal’ Atlantic Hurricane Season

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Climate change could be worse than our worst-case analysis: Texas A&M’s Dessler

# inTheNews[].label
Two New Coronaviruses Make the Leap into Humans

# inTheNews[].label
Here we go again: Texas, climate change and the power grid

# inTheNews[].label
Texas experts react to news of warming Antartica

# inTheNews[].label
Is climate change amping up the Pacific Northwest heat wave? Yes — and it’s time to stop asking.

# etdChairOf[].label
Verma, Abhishek (2011-12). Definitions of Clear-sky Fluxes and Implications. Master's Thesis.

# etdChairOf[].label
Wang, Tao (2014-05). Trajectory Simulations of H2O, O3, and CO in the Upper Troposphere and Lower Stratosphere (UTLS). Doctoral Dissertation.

# etdChairOf[].label
Cardona, Allison Leanne (2008-10). The frequency of tropopause-level thick and thin cirrus clouds as observed by CALIPSO and the relationship to relative humidity and outgoing longwave radiation. Master's Thesis.

# etdChairOf[].label
Lee, Joonsuk (2009-06). Mixed-phase clouds, thin cirrus clouds, and OLR over the tropics: observations, retrievals, and radiative impacts. Doctoral Dissertation.

# etdChairOf[].label
Solbrig, Jeremy E. (2010-10). Thin Cloud Length Scales Using CALIPSO and CloudSat Data. Master's Thesis.

# etdChairOf[].label
Adams, Brooke K (2018-08). Understanding the Impact of Internal Variability on Estimates of the Transient Climate Response. Master's Thesis.

# etdChairOf[].label
Smalley, Kevin (2016-12). Predicting Lower Stratospheric Water Vapor from Chemistry-Climate Models Using a Multivariate Linear Regression. Master's Thesis.

# etdChairOf[].label
Yu, Wandi (2017-12). Model Simulation of Convectively Lofted Ice Contribution to Stratospheric Water Vapor. Master's Thesis.

# etdChairOf[].label
Kummer II, John Reese (2017-08). An Estimate of ECS Based on Observations: The Impact of Forcing Efficacy. Master's Thesis.

# etdChairOf[].label
Casey, Sean Patrick (2007-08). The frequency of tropical precipitating clouds as observed by the TRMM PR and ICESat/GLAS. Master's Thesis.

# etdChairOf[].label
Zhou, Chen (2014-07). Attribution Analysis of Cloud Feedback. Doctoral Dissertation.

# etdChairOf[].label
Casey, Sean P. (2009-12). An Assessment of Factors Limiting Tropical Congestus Cloud-Top Heights. Doctoral Dissertation.

# etdChairOf[].label
Ye, Hao (2018-05). Effects of Convective Ice Evaporation on Water Vapor Interannual Variability in the Tropical Tropopause Layer (TTL). Doctoral Dissertation.

# etdChairOf[].label
Wang, Xun (2017-08). A Trajectory Study of the Seasonal Cycle of the Tropical Lower Stratospheric Water Vapor in Chemistry-Climate Models in Comparison with Observations. Master's Thesis.

# etdChairOf[].label
Wang, Tao (2011-05). Analysis of the Tropical Tropopause Layer Cirrus in CALIPSO and MLS Data - A Water Perspective. Master's Thesis.

# etdChairOf[].label
Christenberry, Aaron Joseph (2012-05). Seasonal and Regional Variability of Stratospheric Dehydration. Master's Thesis.