Posts by Collection

Aman Gupta

Aman is a PhD student in my group.

Kevin DallaSanta

Kevin is a PhD student in my group.

Martin Jucker

Postdoctoral Research Scientist, 2014-2016.

A Mechanism and Simple Dynamical Model of the North Atlantic Oscillation and Annular Modes

Official version

Vallis, G. K., E. P. Gerber, P. J. Kushner and B. A. Cash, 2004: A Mechanism and Simple Dynamical Model of the North Atlantic Oscillation and Annular Modes. J. Atmos. Sci., 61, 264-280, doi:10.1175/1520-0469(2004)061<0264:AMASDM>2.0.CO;2.

A Stochastic Model for the Spatial Structure of Annular Patterns of Variability and the North Atlantic Oscillation

Official version

Gerber E. P. and G. K. Vallis, 2005: A Stochastic Model for the Spatial Structure of Annular Patterns of Variability and the NAO. J. Climate, 18, 2101-2118, doi:10.1175/JCLI3337.1.

Eddy–Zonal Flow Interactions and the Persistence of the Zonal Index

Official version

Gerber E. P. and G. K. Vallis, 2007: Eddy–Zonal Flow Interactions and the Persistence of the Zonal Index. J. Atmos. Sci., 64, 3296-3311, doi:10.1175/JAS4006.1.

Local and hemispheric dynamics of the North Atlantic Oscillation, annular patterns and the zonal index

Official version

Vallis G. K. and E. P. Gerber, 2008: Local and Hemispheric Dynamics of the North Atlantic Oscillation, Annular Patterns and the Zonal Index. Dyn. Atmos. and Ocean, 44, 184-212, doi:10.1016/j.dynatmoce.2007.04.003.

Testing the Annular Mode Autocorrelation Time Scale in Simple Atmospheric General Circulation Models

Official version

Gerber, E. P., S. Voronin, and L. M. Polvani, 2008: Testing the Annular Mode Autocorrelation Timescale in Simple Atmospheric General Circulation Models. Mon. Wea. Rev., 136, 1523-1536, doi:10.1175/2007MWR2211.1.

Annular mode time scales in the Intergovernmental Panel on Climate Change Fourth Assessment Report models

Official version

Gerber, E. P., L. M. Polvani, and D. Ancukiewicz, 2008: Annular Mode Time Scales in the Intergovernmental Panel on Climate Change Fourth Assessment Report Models. Geophys. Res. Lett., 35, doi:10.1029/2008GL035712.

On the Zonal Structure of the North Atlantic Oscillation and Annular Modes

Official version

Gerber E. P. and G. K. Vallis, 2009: On the Zonal Structure of the NAO and Annular Modes. J. Atmos. Sci., 66, 332-352, doi:10.1175/2008JAS2682.1.

Stratosphere–Troposphere Coupling in a Relatively Simple AGCM: The Importance of Stratospheric Variability

Official version

Gerber, E. P. and L. M. Polvani, 2009: Stratosphere-troposphere Coupling in a Relatively Simple AGCM: The Importance of Stratospheric Variability. J. Climate, 22, 1920-1933, doi:10.1175/2008JCLI2548.1.

Stratospheric influence on the tropospheric circulation revealed by idealized ensemble forecasts

Official version

Gerber, E. P., C. Orbe, and L. M. Polvani, 2009: Stratospheric Influence on the Tropospheric Circulation Revealed by Idealized Ensemble Forecasts. Geophys. Res. Lett., 36, L24801, doi:10.1029/2009GL040913.

Intermodel variability of the poleward shift of the austral jet stream in the CMIP3 integrations linked to biases in 20th century climatology

Official version

Kidston, J. and E. P. Gerber, 2010: Intermodel Variability of the Poleward Shift of the Austral Jet Stream in the CMIP3 Integrations Linked to Biases in 20th Century Climatology. Geophys. Res. Lett., 37, L09708, doi:10.1029/2010GL042873.

Stratosphere‐troposphere coupling and annular mode variability in chemistry‐climate models

Official version

Gerber, E. P., M. P. Baldwin, and CCMVal-2 coauthors, 2010: Stratosphere-Troposphere Coupling and Annular Mode Variability in Chemistry-Climate Models. J. Geophys. Res., 115, D00M06, doi:10.1029/2009JD013770.

Impact of stratospheric ozone on Southern Hemisphere circulation change: A multimodel assessment

Official version

Son, S.-W., E.P. Gerber, J. Perlwitz, L.M. Polvani, N. Gillett, K.-H.Seo, and CCMVal-2 coauthors, 2010: The Impact of Stratospheric Ozone on Southern Hemisphere Circulation Changes: A Multimodel Assessment. J. Geophys. Res., 115, D00M07, doi:10.1029/2010JD014271.

Antarctic ozone depletion and trends in tropopause Rossby wave breaking

Official version

Ndarana, T., D. W. Waugh, L. M. Polvani, G. Correa, and E. P. Gerber, 2012: Antarctic ozone depletion and trends in tropopause Rossby wave breaking. Atmosph. Sci. Lett., 13, 164-168, doi:10.1002/asl.384.

Assessing and Understanding the Impact of Stratospheric Dynamics and Variability on the Earth System

Official version

Gerber, E. P., A. Butler, N. Calvo, A. Charlton-Perez, M. Giorgetta, E. Manzini, J. Perlwitz, L. M. Polvani, F. Sassi, A. A. Scaife, T. A. Shaw, S.-W. Son and S. Watanabe, 2012: Assessing and Understanding the Impact of Stratospheric Dynamics and Variability on the Earth System. Bull. Amer. Meteor. Soc., 93, 845-859, doi: 10.1175/BAMS-D-11-00145.1.

Abrupt Circulation Responses to Tropical Upper-Tropospheric Warming in a Relatively Simple Stratosphere-Resolving AGCM

Official version

Wang, S., E. P. Gerber, and L. M. Polvani, 2012: Abrupt Circulation Responses to Upper Tropospheric Warming in a Relatively Simple Stratosphere-Resolving AGCM. J. Climate, 25, 4097-4115, doi:10.1175/JCLI-D-11-00166.1.

Stratospheric versus Tropospheric Control of the Strength and Structure of the Brewer–Dobson Circulation

Official version

Gerber, E. P., 2012: Stratospheric versus Tropospheric Control of the Strength and Structure of the Brewer-Dobson Circulation. J. Atmos. Sci., 69, 2857-2877, doi:10.1175/JAS-D-11-0341.1.

The role of stratosphere‐troposphere coupling in the occurrence of extreme winter cold spells over northern Europe

Official version

Tomassini, L., E. P. Gerber, M. P. Baldwin, F. Bunzel and M. Giorgetta, 2012: The role of stratosphere-troposphere coupling in the occurrence of extreme winter cold spells over Northern Europe. J. Adv. in Model. Earth Syst., 4, M00A03, doi:10.1029/2012MS000177.

The Effect of Tropospheric Jet Latitude on Coupling between the Stratospheric Polar Vortex and the Troposphere

Official version

Garfinkel, C. I., D. W. Waugh, and E. P. Gerber, 2013: The Effect of Tropospheric Jet Latitude on Coupling between the Stratospheric Polar Vortex and the Troposphere. J. Climate, 26, 2077-2097, doi:10.1175/JCLI-D-12-00301.1.

On the lack of stratospheric dynamical variability in low‐top versions of the CMIP5 models

Official version

Charlton-Perez, A. J. and 27 Coauthors (including E. P. Gerber), 2013: On the lack of stratospheric dynamical variability in low-top versions of the CMIP5 models. J. Geophys. Res. Atmos., 118, 2494-2505, doi:10.1002/jgrd.50125.

Climate Processes: Clouds, Aerosols and Dynamics

Official version

Sherwood, S. C., M. J. Alexander, A. R. Brown, N. A. McFarlane, E. P. Gerber, G. Feingold, A. A. Scaife, and W. W. Grabowski, 2013: Climate Processes: Clouds, Aerosols and Dynamics. Climate Science for Serving Society: Research, Modelling and Prediction Priorities, G. R. Asrar and J. W. Hurrell, Eds. 73-103, doi:10.1007/978-94-007-6692-1_4.

The Role of High-Latitude Waves in the Intraseasonal to Seasonal Variability of Tropical Upwelling in the Brewer–Dobson Circulation

Official version

Ueyama, R., E. P. Gerber, J. M. Wallace and D. M. W. Frierson, 2013: The role of high-latitude waves in the intraseasonal to seasonal variability of tropical upwelling in the Brewer-Dobson circulation. J. Atmos. Sci., 70, 1631-1648, doi:10.1175/JAS-D-12-0174.1.

Understanding Hadley Cell Expansion versus Contraction: Insights from Simplified Models and Implications for Recent Observations

Official version

Tandon, N. F., E. P. Gerber, A. H. Sobel, and L. M. Polvani, 2013: Understanding Hadley Cell Expansion vs. Contraction: Insights from Simplified Models and Implications for Recent Observations. J. Climate, 26, 4304-4321, doi:10.1175/JCLI-D-12-00598.1.

Compensation between Resolved and Unresolved Wave Driving in the Stratosphere: Implications for Downward Control

Official version

Cohen, N. Y., E. P. Gerber, and O. Buhler, 2013: Compensation between Resolved and Unresolved Wave Driving in the Stratosphere: Implications for Downward Control . J. Atmos. Sci., 70, 3780-3798, doi:10.1175/JAS-D-12-0346.1.

Impacts of the north and tropical Atlantic Ocean on the Antarctic Peninsula and sea ice

Official version

Li, X., D. H. Holland, E. P. Gerber, and C. Yoo, 2014: Impacts of North and Tropical Atlantic Ocean on the Antarctic Peninsula and Sea Ice. Nature, 505, 538-542, doi:10.1038/nature12945.

Northern winter climate change: Assessment of uncertainty in CMIP5 projections related to stratosphere‐troposphere coupling

Official version

Manzini, E., A. Yu. Karpechko and 21 Coauthors (including E. P. Gerber), 2014: Northern winter climate change: Assessment of uncertainty in CMIP5 projections related to stratosphere – troposphere coupling. J. Geophys. Res. Atmos., 119, 7979–7998, doi:10.1002/2013JD021403.

Quantifying the Summertime Response of the Austral Jet Stream and Hadley Cell to Stratospheric Ozone and Greenhouse Gases

Official version

Gerber, E. P. and S.-W. Son, 2014: Quantifying the Summertime Response of the Austral Jet Stream and Hadley Cell to Stratospheric Ozone and Greenhouse Gases. J. Climate, 27, 5538-5559, doi:10.1175/JCLI-D-13-00539.1.

The predictability of the extratropical stratosphere on monthly time‐scales and its impact on the skill of tropospheric forecasts

Official version

Tripathi, O. and 15 Coauthors (including E. P. Gerber), 2014: Review: The Predictability of the Extra-tropical Stratosphere on monthly timescales and its Impacts on the Skill of Tropospheric Forecasts. Quart. J. Roy. Met. Soc., 141, 987-1003, doi:10.1002/qj.2432.

What Drives the Brewer–Dobson Circulation?

Official version

Cohen, N. Y., E. P. Gerber, and O. Buhler, 2014: What drives the Brewer-Dobson Circulation? J. Atmos. Sci., 71, 3837-3855, doi:10.1175/JAS-D-14-0021.1.

The Impact of Baroclinic Eddy Feedback on the Persistence of Jet Variability in the Two-Layer Model

Official version

Zurita-Gotor, P., J. Blanco-Fuentes, and E. P. Gerber, 2014: The impact of baroclinic eddy feedback on the persistence of jet variability in the two layer model. J. Atmos. Sci., 71, 410-429, doi:10.1175/JAS-D-13-0102.1.

A Rossby Wave Bridge from the Tropical Atlantic to West Antarctica

Official version

Li, X., E. P. Gerber, D. H. Holland, and C. Yoo, 2015: A Rossby Wave Bridge from the Tropical Atlantic to West Antarctica. J. Climate, 28, 2256–2273, doi:10.1175/JCLI-D-14-00450.1.

Seasonal Variability of the Polar Stratospheric Vortex in an Idealized AGCM with Varying Tropospheric Wave Forcing

Official version

Sheshadri, A., R. A. Plumb, and E. P. Gerber, 2015: Seasonal Variability of the Polar Stratospheric Vortex in an Idealized AGCM with Varying Tropospheric Wave Forcing. J. Atmos. Sci., 72, 2256–2273, doi:10.1175/JAS-D-14-0191.1.

Rossby Waves Mediate Impacts of Tropical Oceans on West Antarctic Atmospheric Circulation in Austral Winter

Official version

Li, X., E. P. Gerber, D. H. Holland, and C. Yoo, 2015: Rossby Waves Mediate Impacts of Tropical Oceans on West Antarctic Atmospheric Circulation in Austral Winter. J. Climate, 28, 8151-8164, doi:10.1175/JCLI-D-15-0113.1.

Constraining Future Summer Austral Jet Stream Positions in the CMIP5 Ensemble by Process-Oriented Multiple Diagnostic Regression

Official version

Wenzel, S., V. Eyring, E. P. Gerber and A. Yu. Karpechko 2016: Constraining Future Austral Jet Stream Position and Shifts in the CMIP5 Ensemble by Process-oriented Multiple Diagnostic Regression, J. Climate, 9, 673-687, doi:10.1175/JCLI-D-15-0412.1.

Is the Brewer‐Dobson circulation increasing or moving upward?

Official version

Oberlaender-Hayn, S., E. P. Gerber, J. Abalichin, H. Akiyoshi, A. Kerschbaumer, A. Kubin, M. Kunze, U. Langematz, S. Meul, M. Michou, O. Morgenstern and L. D. Oman, 2016: Is the Brewer-Dobson circulation increasing, or moving upward? Geophys. Res. Lett., 43, doi:10.1002/2015GL067545.

Examining the Predictability of the Stratospheric Sudden Warming of January 2013 Using Multiple NWP Systems

Official version

Tripathi, O. P., M. Baldwin, A. Charlton-Perez, M. Charron, J. C. H. Cheung, S. D. Eckermann, E. Gerber, D. R. Jackson, Y. Kuroda, A. Lang, J. McLay, R. Mizuta, C. Reynolds, G. Roff, M. Sigmond, S.-W. Son, and T. Stockdale, 2016: Examining the Predictability of the Stratospheric Sudden Warming of January 2013 Using Multiple NWP Systems, Mon. Wea. Rev., 144, 1935-1960 doi:10.1175/MWR-D-15-0010.1.

The Model Intercomparison Project on the climatic response to Volcanic forcing (VolMIP): experimental design and forcing input data for CMIP6

Official version

Zanchettin, D. and 23 coauthors (including E. P. Gerber), 2016: The Model Intercomparison Project on the climatic response to Volcanic forcing (VolMIP): Experimental design and forcing input data, Geosci. Model Dev., 9, 2701-2719, doi:10.5194/gmd-9-2701-2016.

The Rain Is Askew: Two Idealized Models Relating Vertical Velocity and Precipitation Distributions in a Warming World

Official version

Pendergrass, A. and E. P. Gerber, 2016: The rain is askew: Two idealized models relating the vertical velocity and precipitation distributions in a warming world, J. Climate, 29, 6445-6462, doi:10.1175/JCLI-D-16-0097.1.

The Dynamics and Variability Model Intercomparison Project (DynVarMIP) for CMIP6: assessing the stratosphere–troposphere system

Official version

Gerber, E. P. and E. Manzini, 2016: The Dynamics and Variability Model Intercomparison Project (DynVarMIP) for CMIP6: Assessing the stratosphere–troposphere system, Geosci. Model Dev., 9, 3413-3425, doi:10.5194/gmd-9-3413-2016.

The Relationship between Age of Air and the Diabatic Circulation of the Stratosphere

Official version

Linz, M., R. A. Plumb, E. P. Gerber, and A. Sheshadri 2016: The relationship between age of air and the diabatic circulation of the stratosphere, J. Atmos. Sci., 73, 4507-4518, doi:10.1175/JAS-D-16-0125.1.

What Makes an Annular Mode Annular?

Official version

Gerber, E. P. and D. W. J. Thompson, 2017: What makes an annular mode annular? J. Atmos. Sci., 74, 317-332, doi:10.1175/JAS-D-16-0191.1.

Introduction to the SPARC Reanalysis Intercomparison Project (S-RIP) and overview of the reanalysis systems

Official version

Fujiwara, M., Wright, J., and 34 coauthors (including E. P. Gerber), 2017: Introduction to the SPARC Reanalysis Intercomparison Project (SRIP) and overview of the reanalysis systems, Atmos. Chem. Phys., 17, 1417-1452, doi:10.5194/acp-17-1417-2017.

Defining Sudden Stratospheric Warmings in Models: Accounting for Biases in Model Climatologies

Official version

Kim, J., S.-W. Son, E. P. Gerber, and H.-S. Park, 2017: Defining Sudden Stratospheric Warmings in Models: Accounting for Biases in Model Climatologies, J. Climate, 30, 5529-5546, doi:10.1175/JCLI-D-16-0465.1

Untangling the Annual Cycle of the Tropical Tropopause Layer with an Idealized Moist Model

Official version

Jucker, M. and E. P. Gerber, 2017: Untangling the annual cycle of the tropical tropopause layer with an idealized moist model, J. Climate, 30, 7339-7358, doi:10.1175/JCLI-D-17-0127.1.

The strength of the meridional overturning circulation of the stratosphere

Official version

Linz, M., R. A. Plumb, E. P. Gerber, F. J. Haenel, G. Stiller, D. E. Kinnison, A. Ming, and J. L. Neu, 2017: The strength of the meridional overturning circulation of the stratosphere, Nature Geo., 10, 663-667, doi:10.1038/ngeo3013.

Optimizing the Definition of a Sudden Stratospheric Warming

Official version

Butler, A. and E. P. Gerber, 2018: Optimizing the definition of a sudden stratospheric warming. J. Climate, 31, 2337-2344, doi:10.1175/JCLI-D-17-0648.1.

Isca, v1.0: A Framework for the Global Modelling of the Atmospheres of Earth and Other Planets at Varying Levels of Complexity

Official version

Vallis, G. K., G. Colyer, R. Geen, E. P. Gerber, M. Jucker, P. Maher, A. Paterson, M. Pietschnig, J. Penn, and S. I. Thomson, 2018: Isca, v1.0: A Framework for the Global Modelling of the Atmospheres of Earth and Other Planets at Varying Levels of Complexity. Geosci. Model. Dev., 11, 843-859, doi:10.5194/gmd-11-843-2018.

Quantifying the variability of the annular modes: Reanalysis uncertainty vs. sampling uncertainty

Official version

Gerber, E. P. and P. Martineau, 2018: Quantifying the variability of the annular modes: Reanalysis uncertainty vs. sampling uncertainty. Atmos. Chem. Phys., 18, 17099-17117, doi:10.5194/acp-18-17099-2018.

The Downward Influence of Sudden Stratospheric Warmings: Association with Tropospheric Precursors

Official version

White, I., C. Garfinkel, E. P. Gerber, M. Jucker, V. Aquila, and L. Oman, 2019: The Downward Influence of Sudden Stratospheric Warmings: Association with Tropospheric Precursors, J. Climate, 32, 85-108 doi:10.1175/JCLI-D-18-0053.1.

Sub-seasonal Predictability and the Stratosphere

Official version

Butler, A., A. Charlton-Perez, D. I. V. Domeisen, C. Garfinkel, E. P. Gerber, P. Hitchcock, A. Y. Karpechko, A. C. Maycock, M. Sigmond, I. Simpson, and S.-W. Son, 2019: Sub-seasonal Predictability and the Stratosphere, Sub-seasonal to Seasonal Prediction: The Gap Between Weather and Climate Forecasting, A. W. Robserton and F. Vitart, Eds., 223-241, doi:10.1016/B978-0-12-811714-9.00011-5.

The Circulation Response to Volcanic Eruptions: The Key Roles of Stratospheric Warming and Eddy Interactions

Official version

DallaSanta, K., E. P. Gerber, and M. Toohey, 2019: The Circulation Response to Volcanic Eruptions: The Key Roles of Stratospheric Warming and Eddy Interactions, J. Climate, 32, 1101-1120, doi:10.1175/JCLI-D-18-0099.1.

Model Hierarchies for Understanding Atmospheric Circulation

Official version

Maher, P., E. P. Gerber, B. Medeiros, T. Merlis, S. Sherwood, A. Sheshadri, A. Sobel, G. Vallis, A. Voigt, and P. Zurita-Gotor, 2019: Model hierarchies for understanding atmospheric circulation, Rev. Geophys., 57, 250-280, doi:10.1029/2018RG000607.

Imagining Simpler Worlds to Understand the Complexity of Our Own

Official version

Gerber, E. P., K. DallaSanta, and A. Gupta, 2019: Imagining Simpler Worlds to Understand the Complexity of Our Own, J. Adv. in Model. Earth Syst., 11, 2862–2867, doi:10.1029/2019MS001753.

The building blocks of Northern Hemisphere wintertime stationary waves

Official version to appear

Garfinkel, C. I., I. White, E. P. Gerber, M. Jucker, and M. Erez, 2020: The building blocks of Northern Hemisphere wintertime stationary waves, J. Climate., in press.

The generic nature of the tropospheric response to sudden stratospheric warmings

Official version to appear. Supplemental material.

White, I., C. I. Garfinkel, E. P. Gerber, M. Jucker, P. Hitchcock, and J. Rao, 2020: The generic nature of the tropospheric response to sudden stratospheric warmings, J. Climate., in press.

Intraseasonal Variability in the Midlatitudes: The Role of Stratosphere

Published: April 13, 2008

Two lectures on the stratospheric influence on tropospheric weather and climate

Published: May 04, 2009

What can Idealized GCMs Tell us About the Stratosphere and Climate Change?

Published: May 24, 2009

What can Idealized GCMs Tell us About the Stratosphere and Climate Change?

Published: July 19, 2009

On the time scales of midlatitude atmospheric variability: Eddy-mean flow interactions and coupling from on high

Published: March 22, 2010

On the time scales of midlatitude atmospheric variability

Published: August 08, 2010

The upper atmosphere in the Earth system and in Earth system modeling

Published: September 28, 2011

Climate Change and Variability in the Southern Hemisphere: An Atmospheric Dynamics Perspective

Published: October 19, 2011

Modeling the extratropical jets: Connections between the mean climate, variability, and response to anthropogenic forcing

Published: October 24, 2011

Mechanisms Driving the BDC: A perspective from idealized models

Published: June 25, 2012

The Influence of Ozone Depletion on the Atmospheric Circulation

Published: February 25, 2013

Understanding and predicting the Brewer-Dobson circulation

Published: January 12, 2014

Storm tracks in comprehensive climate models

Published: August 25, 2015

The tropical tropopause layer in an idealized moist model: Tropical vs. extratropical control

Published: February 16, 2016

How should we quan- tify the role of gravity wave driving in the Brewer-Dobson Circulation?

Published: May 16, 2016

Untangling the tropical tropopause layer with an idealized moist model: Tropical vs. extratropical control

Published: December 12, 2016

The Circulation Response to Volcanic Eruptions

Published: June 28, 2018

The Circulation Response to Volcanic Eruptions

Published: July 18, 2018

Volcanic eruptions: A natural case study for understanding the storm track response to external forcing

Published: August 31, 2018

How to be a Successful Graduate Student: One Ex-student’s Insight on How to get through Graduate School and Find a Job

Published: September 14, 2018

The Annular Modes in reanalyses: The value of conventional and surface-observation only based reanalyses in the Northern Hemisphere

Published: October 02, 2018

The annular modes in reanalyses: The value of conventional and surface-observation input reanalyses in the Northern Hemisphere

Published: January 10, 2019

Untangling the Annual Cycle of the Tropical Tropopause Layer with an Idealized Moist Model

Published: February 26, 2019

The Circulation Response to Volcanic Eruptions

Published: February 27, 2019

Untangling the Annual Cycle of the Tropical Tropopause Layer with an Idealized Moist Model

Published: March 01, 2019

The Circulation Response to Volcanic Eruptions

Published: April 05, 2019

Untangling the Annual Cycle of the Tropical Tropopause Layer with an Idealized Moist Model

Published: April 17, 2019

The Incredible Shrinking Stratosphere

Published: June 10, 2019

Revisiting the Tropopause-Jet Relationship in a Hierarchy of Atmospheric Models

Published: June 27, 2019

The Circulation Response to Volcanic Eruptions

Published: September 23, 2019

The Response of the Jet Streams to Global Warming Across a Hierarchy of Models

Published: October 22, 2019

Trace Gas Transport in the Stratosphere: Opportunities and Challenges

Published: November 19, 2019

The transport of trace gases through the stratosphere impacts surface climate. Small changes in stratospheric water vapor, on the order of one part per million, can impact surface temperature by as much as a tenth of a degree. A sudden drop in stratospheric water vapor of this magnitude – a response to internal variability of the atmosphere – was observed in 2000. Chemistry climate model simulations of stratospheric ozone also depend critically on the transport of ozone and ozone depleting substances, and biases in transport are a leading source of uncertainty in the recovery of stratospheric ozone. Volcanic aerosols (and the possibility of injecting sulfur into the stratosphere for climate intervention) provides another example of the importance of stratospheric tracer transport for the climate at the surface.

Downward migration of the zonal-mean circulation in the tropical atmosphere

Published: December 11, 2019

The annular modes of the extratropical atmosphere have received much attention for quantifying and predicting variability of the jet streams and storm tracks, despite the limited zonal coherence of midlatitude variability. In the tropics, annular Huctuations of the circulation have not been investigated, despite the comparative dominance of zonal-mean variations in this region, associated with weak temperature gradients at low latitudes.

Downward Migration in the Zonal Mean Circulation of the Tropical Atmosphere

Published: January 31, 2020

This is my first ever virtual colloquium visit. From the comforts of my own office, I’ll present my talk over the internet, coupled with a day of virtual meetings with students, postdocs, and faculty. The goal is to reduce our CO2 footprint – something our field should mindful of more than any other – but it will also help reduce the “family footprint”, i.e. the impact on spouses left to deal with kids who tend to get sick this time of year. Ugh. Only catch is that the seminar is 3:30 pm on a Friday, Pacific time!

Downward Migration in the Zonal Mean Circulation of the Tropical Atmosphere

Published: April 06, 2020

The Science and Policy of Climate Change

First Year Seminar, Fall, 2018

Thursdays, 2:00-4:30, Warren Weaver Hall 1314
Office Hours: Wednesday 2-3 pm and Thursday 1-2 pm, Warren Weaver Hall 911

Dynamics of the Earth’s Atmosphere and Climate

MATH-UA 228 / ENVST-UA 360, Spring, 2019

Lectures: Monday and Wednesday, 9:30-10:45, Warren Weaver Hall 312
Laboratory: Friday, 9:30-10:45, Warren Weaver Hall 517
Office Hours: Monday and Wednesday, 11-12, Warren Weaver Hall 911

The Science and Policy of Climate Change

First Year Seminar, Fall, 2019

Thursdays, 2:00-4:30, Warren Weaver Hall 1314
Office Hours: Wednesday 2-3 pm and Thursday 1-2 pm, Warren Weaver Hall 911

Atmospheric Dynamics

MATH-GA 3004, Spring, 2020

Lectures: Tuesday 1:25-3:15 pm, Warren Weaver Hall 512
Office Hours: Tuesday 3:30-4:30 and Wednesday 2:30-3:30, Warren Weaver Hall 911