Project

4012

Chief Investigator

KLEKOCIUK, Dr Andrew - Australian Antarctic Division

Title

Polar FORCeS: Polar Feedbacks between Ozone Recovery and Climate in the Southern hemisphere

Project aims

During the past 3 decades, man-made ozone depleting chemicals have caused dramatic reductions in stratospheric ozone over Antarctica each spring. These ozone changes have influenced climate in the Southern Hemisphere, particularly during summer, but the nature of the effects is not well understood. This project uses atmospheric data and world-class climate models to gain new insights into how variations in the regional distribution of ozone couples to the Earth system in the Antarctic and Southern Ocean region, and how the coupling will respond to the expected future recovery in ozone levels.

Project gallery


Project Summary of the Season 2012/13

The project began using the Australian Community Climate and Earth System Simulator (ACCESS) to provide the Australian contribution to the international Chemistry-Climate Model Initiative (CCMI) project. This is the first time that Australia has participated in an assessment program of this type. In performing this work, we have extended and improved the capability of ACCESS to more accurately simulate climate in the Antarctic region. We have also undertaken evaluation of Australian climate model simulations for the 5th Climate Model Intercomparison Project (CMIP5) to provide a benchmark to evaluate our CCMI runs. In addition, we have analysed historical atmospheric measurements for the Antarctic region to help understand the mechanism behind circulation changes related to greenhouse gas and ozone changes, and to evaluate how chemistry-climate models represent these changes.

Project Summary of the Season 2013/14

During the last year we successfully completed three chemistry-climate model simulations using the Australian Community Climate and Earth System Simulator (ACCESS). These simulations provide Australia's initial contribution to the Chemistry-Climate Model Initiative (CCMI) which is a comparison of state-of-the-art climate models that will inform future assessments of global climate. We have started to evaluate the performance of our simulations in comparison with observations, other simulations with ACCESS that have used a simplified description of ozone concentrations and other climate models to evaluate the sensitivity of climate in the Antarctic region to changes in ozone. While we find some biases in the ability of our model to represent the Antarctic atmosphere during the observational period from 1960-2010 (primarily in terms of an underestimation of the depth of the Antarctic ozone hole and a cold bias in spring stratospheric temperatures), our simulations generally have improved performance compared with models that participated in the previous chemistry-climate model assessment (the 2nd Chemistry-Climate Model Validation) - aspects of the performance of our simulations can be gauged from panels A and B in the attached project image. We are currently accumulating further simulations so that we can adequately characterise the internal variability of our model and assess the sensitivity of surface climate in the Antarctic region to the distribution of ozone.

Project Summary of the Season 2014/15

During the last year we successfully completed two further chemistry-climate model simulations using the Australian Community Climate and Earth System Simulator (ACCESS). These simulations add to Australia's contribution to the Chemistry-Climate Model Initiative (CCMI) which is a comparison of state-of-the-art climate models that will inform future assessments of global climate. The new simulations separately evolve ozone depleting substances and greenhouse gases over the period 1960 to 2100, and are being used with our earlier model output to evaluate the sensitivity of Antarctic surface climate to anthropogenic influences. We have submitted a manuscript for peer review which evaluates the performance of our initial simulations against historical observations. Aspects of the performance of our simulations can be gauged from Figs. 1 and 2 in the attached project image. Our model output is currently being made available publicly through the CCMI archive at the British Atmospheric Data Centre. We have progressed the design of further simulations which will test the sensitivity of the Antarctic surface climate to the distribution of stratospheric ozone. We have also progressed investigations of trends and variability of polar ozone, publishing details on the link with of Pacific sea surface temperature anomalies, and completed an analysis which shows that changes in the large scale pattern of spring ozone over Antarctica over the past decade are concomitant the warming hiatus that has taken been observed in the eastern Pacific since 2001.

Project Summary of the Season 2015/16

During the last year we successfully completed further chemistry-climate model simulations using the Australian Community Climate and Earth System Simulator (ACCESS). These simulations add to Australia's contribution to the Chemistry-Climate Model Initiative (CCMI) which is a comparison of state-of-the-art climate models that will inform future assessments of global climate. The new simulations provide additional ensemble members to evaluate internal variability in the model. Our model output is currently being made available publicly through the CCMI archive at the British Atmospheric Data Centre. We have progressed the implementation of further simulations which will test the sensitivity of the Antarctic surface climate to the distribution of stratospheric ozone. The new simulations includes the use of an advanced configuration of the chemistry-climate version of ACCESS model, which for the first time involves a coupled ocean. We have also prepared for peer review a manuscript which describes future changes in the distribution of Antarctic ozone based on our model simulations.

Final Summary of Project Achievements

During the past 3 decades, human-produced ozone depleting chemicals have caused dramatic reductions in stratospheric ozone over Antarctica each spring. These ozone changes have influenced climate in the Southern Hemisphere, particularly during summer, but the nature of the effects is not well understood. This project created a new Australian capability in chemistry-climate modelling which enabled new insights to be gained into how variations in the regional distribution of ozone couples to the Earth system in the Antarctic and Southern Ocean region, and how the coupling will respond to the expected future recovery in ozone levels. The key findings include (a) a new assessment of the strength and variability of the Antarctic polar vortex, demonstrating that long-term changes in its shape and position are controlled by greenhouse gases and ozone depleting substances; (b) that recovery of the Antarctic ozone hole to 1980 levels is likely in the range 2055-2062; and (c) there remains uncertainty in how ozone depletion is influenced by interactions with key climate gases including methane, carbon dioxide and nitrous oxide, and how these effects couple with Antarctic surface climate.

Category 1: Peer-reviewed literature

Gies P., Klekociuk A., Tully M., Henderson S., Javorniczky J., King K., Lemus-Deschamps L., Makin J. (2013) Low Ozone over Southern Australia in August 2011 and its Impact on Solar Ultraviolet Radiation Levels, Photochemistry and Photobiology 89. 984-994; [Ref: 15063]

Siddaway J.M., Petelina S.V., Karoly D.J., Klekociuk A.R., Dargaville R.J. (2013) Evolution of Antarctic ozone in September–December predicted by CCMVal-2 model simulations for the 21st century, Atmospheric Chemistry and Physics 13(8). 4413-4427; [Ref: 15080]

Tully M.B., Klekociuk A.R., Rhodes S.K. (2013) Trends and Variability in Total Ozone from a Mid-Latitude Southern Hemisphere Site: The Melbourne Dobson Record 1978–2012, Atmosphere-Ocean 8pp; [Ref: 15137]

Alexander S.P., Klekociuk A.R., McDonald A.J., Pitts M.C. (2013) Quantifying the role of orographic gravity waves on polar stratospheric cloud occurrence in the Antarctic and the Arctic, Journal of Geophysical Research 118(20). 11,493–11,507; [Ref: 15140]

Evtushevsky O., Grytsai A., Milinevsky G. (2014) On the regional distinctions in annual cycle of total ozone in the northern midlatitudes, Remote Sensing Letters 5(3). 205-212; [Ref: 15192]

Reid P.A., Tully M.B., Klekociuk A.R., Krummel P.B., Rhodes S.K. (2013) Seasonal climate summary southern hemisphere (spring 2012): warmer and drier across much of Australia, along with a new southern hemisphere sea ice extend record, Australian Meteorological and Oceanographic Journal 63(3). 427-442; [Ref: 15337]

Evtushevsky O.M., Kravchenko V.O., Hood L.L., Milinevsky G.P. (2015) Teleconnection between the central tropical Pacific and the Antarctic stratosphere: spatial patterns and time lags, Climate Dynamics 44(7-8). 1841-1855; [Ref: 15474]

Klekociuk A.R., Tully M.B., Krummel P.B., Gies H.P., Petelina S.V., Alexander S.P., Deschamps L.L., Fraser P.J., Henderson S.I., Javorniczky J., Shanklin J.D., Siddaway J.M., Stone K.A. (2015) The Antarctic Ozone Hole in 2011, Australian Meteorological and Oceanographic Journal 64(4). 293-311; [Ref: 15514]

Klekociuk A.R., Tully M.B., Krummel P.B., Gies H.P., Alexander S.P., Fraser P.J., Henderson S.I., Javorniczky J., Petelina S.V., Shanklin J.D., Schofield R., Stone K.A. (2015) The Antarctic Ozone Hole in 2012, Australian Meteorological and Oceanographic Journal 64(4). 313–330; [Ref: 15515]

Dameris M., Godin-Beekmann S., Alexander S., Braesicke P., Chipperfield M., de Last A.T.J., Orsolini Y., Rex M., Santee M.L. (2014) Update on Polar ozone: Past, present, and future, in: Scientific Assessment of Ozone Depletion: 2014, Global Ozone Research and Monitoring Project – Report No. 55 Chapter 3; [Ref: 15571]

Klekociuk A.R., Krummel P.B., Tully M.B., Gies H.P., Alexander S.P., Fraser P.J., Henderson S.I., Jovorniczky J., Shanklin J.D., Schofield R., Stone K.A. (2015) The Antarctic ozone hole during 2013, Australian Meteorological and Oceanographic Journal 65(2). 247-266; [Ref: 15739]

Hope P., Reid P., Tobin S., Tully M.B., Klekociuk A.R., Krummel P.B. (2015) Seasonal climate summary southern hemisphere (spring 2014): El Niño continues to try to break through, and Australia has its warmest spring on record (again!), Australian Meteorological and Oceanographic Journal 65(2). 267-292; [Ref: 15740]

Turney C.S.M., Fogwill C.J., Klekociuk A.R., van Ommen T.D., Curran M.A.J., Moy A.D., Palmer J.G. (2015) Tropical and mid-latitude forcing of continental Antarctictemperatures, The Cryosphere 9(6). 2405-2415; [Ref: 15741]

Stone K.A., Morgenstern O., Karoly D.J., Klekociuk A.R., French W.J., Abraham N.L., Schofield R. (2016) Evaluation of the ACCESS – chemistry–climate model for the Southern Hemisphere, Atmospheric Chemistry and Physics 16. 2401-2415; [Ref: 15753]

Klekociuk A.R., Wienecke B. (2017) Antarctic environment, in: Australia state of the environment 2016: Department of the Environment And Energy .; [Ref: 15847]

Morgenstern O., Hegglin M.I., Rozanov E., O'Connor F.M., Abraham N.L., Akiyoshi H., Archibald A.T., Bekki S., Butchart N., Chipperfield M.P., Deushi M., Dhomse S.S., García R.R., Hardiman S.C., Horowitz L.W., Jöckel P., Josse B., Kinnison D., Lin M., Mancini E., Manyin M.E., Marchand M., Marécal V., Michou M., Oman L.D., Pitari G., Plummer D.A., Revell L.E., Saint-Martin D., Schofield R., Stenke A., Stone K., Sudo K., Tanaka T.Y., Tilmes S., Yamashita Y., Yoshida K., Zeng G. (2017) Review of the global models used within phase 1 of the Chemistry–Climate Model Initiative (CCMI), Geoscientific Model Development 10. 639-671; [Ref: 15888]

Jackson W.J., Argent R.M., Bax N.J., Bui E., Clark G.F., Coleman S., Cresswell I.D., Emmerson K.M., Evans K., Hibberd M.F., Johnston E.L., Keywood M.D., Klekociuk A.R., Mackay R., Metcalfe D., Murphy H., Rankin A., Smith D.C., Wienecke B. (2017) Overview, in: Australia state of the environment 2016: Department of the Environment And Energy .; [Ref: 15910]

Grystai A., Klekociuk A., Milinevsky G., Evtushevsky O., Stone K. (2017) Evolution of the eastward shift in the quasi-stationary minimum of the Antarctic total ozone column, Atmospheric Chemistry and Physics 17. 1741-1758; [Ref: 15911]

Ayarzagüena B., Polvani L.M., Langematz U., Akiyoshi H., Bekki S., Butchart N., Dameris M., Deushi M., Hardiman S.C., Jöckel P., Klekociuk A.R., Marchand M., Michou M., Morgenstern O., O'Connor F.M., Oman L.D., Plummer D.A., Revell L., Rozanov E., Saint-Martin D., Scinocca J., Stenke A., Stone K., Yamashita Y., Yoshida K., Zeng G. (2018) No robust evidence of future changes in major stratospheric sudden warmings: a multi-model assessment from CCMI, Atmospheric Chemistry and Physics 18(15). 11277-11287; [Ref: 16005]

Orbe C., Yang H., Waugh D.W., Zeng G., Morgenstern O., Kinnison D.E., Lamarque J.-F. , Tilmes S., Plummer D.A., Scinocca J., Josse B., Marécal V., Jöckel P., Oman L.D., Strahan S.E., Deushi M., Tanaka T.Y., Yoshida K., Akiyoshi H., Yamashita Y., Stenke A., Revell L., Sukhodolov T., Rozanov E., Pitari G., Visioni D., Stone K.A., Schofield R., Banerjee A. (2018) Large-scale tropospheric transport in the Chemistry Climate Model Initiative (CCMI) simulations, Atmosphere, Chemistry and Physics 18. 7217-7235; [Ref: 16030]

Morgenstern O., Stone K.A., Schofield R., Akiyoshi H., Yamashita Y., García R.R., Kinnison D.E., Sudo K., Plummer D.A., Scinocca J., Oman L.D., Manyin M.E., Zeng G., Rozanov E., Stenke A., Revell L., Pitari G., Mancini E., Di Genova G., Visioni D., Dhomse S.S., Chipperfield M.P. (2018) Ozone sensitivity to varying greenhouse gases and ozone-depleting substances in CCMI-1 simulations, Atmospheric Chemistry and Physics 18. 1091-1114; [Ref: 16032]

Langematz U., Tully M., Calvo N., Dameris M., de Lat A.J.T, Klekociuk A., Muller R., Young P. (2019) Update on Polar Stratospheric Ozone: Past, Present, and Future, in: Polar Stratospheric Ozone: Past, Present, and Future 1-63; [Ref: 16037]

Dhomse S.S., Kinnison D., Chipperfield M.P., Salawitch R.J., Cionni I., Hegglin M.I., Abraham N.L., Akiyoshi H., Archibald A.T., Bednarz E.M., Bekki S., Braesicke P., Butchart N., Dameris M., Deushi M., Frith M., Hardiman S., Hassler B., Horowitz L.W., Hu R.M., Jöckel P., Josse B., Kirner O., Kremser S., Langematz U., Lewis J., Marchand M., Lin M., Mancini E., Marécal V., Michou M., Morgenstern O., O'Connor F.M., Oman L., Pitari G., Plummer D.A., Pyle J.A., Revell L.E., Rozanov E., Schofield R., Stenke A., Stone K., Sudo K., Tilmes S., Visioni D., Yamashita Y., Zeng G. (2018) Estimates of ozone return dates from Chemistry-Climate Model Initiative simulations, Atmospheric Chemistry and Physics .; [Ref: 16135]

Orbe C., Yang H., Waugh D.W., Zeng G., Morgenstern O., Kinnison D.E., Lamarque J.-F. , Tilmes S., Plummer D.A., Scinocca J., Josse B., Marécal V., Jöckel P., Oman L.D., Strahan S.E., Deushi M., Tanaka T.Y., Yoshida K., Akiyoshi H., Yamashita Y., Stenke A., Revell L., Sukhodolov T., Rozanov E., Schofield R., Stone K., Visioni D., Pitari G., Banerjee A. (2018) Large-scale tropospheric transport in the Chemistry–Climate Model Initiative (CCMI) simulations, Atmospheric Chemistry and Physics .; [Ref: 16136]

Bergstrom D.M., Woehler E.J., Klekociuk A.R., Pook M.J., Massom R.A. (2018) Extreme events as ecosystems drivers: ecological consequences of anomalous Southern Hemisphere weather patterns during the 2001/02 austral spring-summer, Advances in Polar Science 29(3). 190-204; [Ref: 16172]

Wang Y., Shulga V., Milinevsky G., Patoka A., Evtushevsky O., Klekociuk A.R., Han O., Grytsai W., Shulga D., Myshenko V., Antyufeyev O. (2019) Winter 2018 major sudden stratospheric warming impact on midlatitude mesosphere from microwave radiometer measurements, Atmospheric Chemistry and Physics 10303–1031; [Ref: 16213]

Nicely J.M., Duncan B.N., Hanisco T.F., Wolfe G.M., Salawitch R.J., Deushi M., Haslerud A.S., Jöckel P., Josse B., Kinnison D.E., Klekociuk A., Manyin M.E., Marécal V., Morgenstern O., Murray L.T., Myhre G., Oman L.D., Pitari G., Pozzer A., Quaglia I., Revell L.E., Rozanov E., Stenke A., Stone K., Strahan S., Tilmes S., Tost H., Westervelt D.M., Zeng G. (2020) A machine learning examination of hydroxyl radical differences among model simulations for CCMI-1, Atmospheric Chemistry and Physics 1341–1361; [Ref: 16234]

Robinson S.A., Klekociuk A.R., King D.H., Pizarro Rojas M., Zúñiga G.E., Bergstrom D.M. (2020) The 2019/2020 summer of Antarctic heatwaves, Global Change Biology 3178-3180; [Ref: 16323]

French W.J.R., Klekociuk A.R., Mulligan F.J. (2020) Analysis of 24 years of mesopause region OH rotational temperature observations at Davis, Antarctica – Part 2: Evidence of a quasi-quadrennial oscillation (QQO) in the polar mesosphere, Atmospheric Chemistry and Physics 8691–8708; [Ref: 16324]

Shi Y., Shulga V., Ivaniha O., Wang Y., Evtushevsky O., Milinevsky G., Klekociuk A., Patoka A., Han W., Shulga D. (2020) Comparison of Major Sudden Stratospheric Warming Impacts on the Mid-Latitude Mesosphere Based on Local Microwave Radiometer CO Observations in 2018 and 2019, Remote Sensing 1-19; [Ref: 16343]

Siddaway J., Klekociuk A., Alexander S.P., Grytsai A., Milinevsky G., Dargaville R., Ivaniha O., Evtushevsky O. (2020) Assessment of the zonal asymmetry trend in Antarctic total ozone column using TOMS measurements and CCMVal-2 models, Ukrainian Antarctic Journal 2. 50-58; [Ref: 16376]

Tritscher I., Pitts M.C., Poole L.R., Alexander S.P., Cairo F. (2021) Polar Stratospheric Clouds: Satellite Observations, Processes, and Role in Ozone Depletion, Reviews of Geophysics .; [Ref: 16819]

Category 3: Article

Stone K. (2014) Why we celebrate World Ozone Day, ACR Centre for Excellence in Climate System Science .; [Ref: 15572]

Klekociuk A., Gabriel A. (2013) Advancing ozone research in Australia and New Zealand - The Ozone Science Group, Bulletin of the Australian Meteorological and Oceanographic Society 26(5). 81-82; [Ref: 15125]

Category 3: Conference paper

Krummel P.B., Fraser P.J., Klekociuk A.R., Tully M.B. (2013) The 2013 Antarctic ozone hole, Atmospheric Composition and Chemistry Observations and Modelling Conference incorporating the Cape Grim Annual Science Meeting, Aspendale, Victoria, Australia 27-29 November 2013 .; [Ref: 15135]

Krummel P.B., Fraser P.J., Klekociuk A.R., Tully M.B., Derek N. (2015) The 2015 Antarctic ozone hole, Atmospheric Composition & Chemistry Observations & Modelling Conference incorporating the Cape Grim Annual Science Meeting 2015, South Durras, Australia, 11-13 November 2015 .; [Ref: 15734]

O'Farrell S., Klekociuk A.R., French W.J.R., Knight C. (2015) Examining the influence of ozone change on the SAM using ACCESS, Combined ARCCSS Workshop on Model errors, development and evaluation and Eighteenth Informal ACCESS Model Evaluation Workshop, Melbourne, Australia, 18 November 2015 .; [Ref: 15736]

O'Farrell S., Klekociuk A.R., Alexander S.P., Knight C. (2015) The response of the ACCESS climate model to recent ozone change over Antarctica and the Southern Ocean, 26th International Union of Geodesy and Geophysics (IUGG) General Assembly, 22 June - 2 July 2015, Prague, Czech Republic .; [Ref: 15535]

Krummel P., Klekociuk A.R., Fraser P. (2014) The 2014 Ozone Hole, 50th meeting of Advanced Global Atmospheric Gases Experiment (AGAGE) scientists, Scripps Institution of Oceanography, La Jolla, USA, 8-13 December 2014 .; [Ref: 15433]

Category 3: Poster

Stone K.A., Klekociuk A.R., Morgenstern O., Karoly D.J., French W.J.R., Abraham N.L., Schofield R. (2015) Evaluation of the Australian Community Climate and Earth-System Simulator Chemistry-Climate Model, 4th IGAC/SPARC Chemistry Climate Model Initiative Workshop, Frascati, Italy 7-9 October 2015 .; [Ref: 15737]

Milinevsky G., Grytsai A., Klekociuk A.R., Evtushevsky O., Stone K. (2018) Antarctic ozone asymmetry and regional climate changes, Scientific Committee on Antarctic Research Open Science Conference, Davos, Switzerland, 19-23 June 2018 AC-2_928; [Ref: 16021]

Milinevsky G., Grytsai A., Klekociuk A.R., Evtushevsky O. (2013) Backward movement of ozone minimum position as a possible consequence of ozone recovery over Antarctica, American Geophysical Union 2013 Fall Meeting, San Francisco USA, 9-12 December 2013 .; [Ref: 15136]

Alexander S.P., Zhang K., Klekociuk A.R., McDonald A.J., Pitts M.C., Norman R.J., Carter B.A. (2013) On the use of GPS-RO to quantify the effect of mountain waves on polar stratosphere clouds and to diagnose polar UTLS dynamical processes, Fifth International Workshop on Occultations for Probing Atmosphere and Climate, Leibnitz, Austria, September 2013 .; [Ref: 15143]

Klekociuk A.R., Alexander S.P., Stone K., Morgenstern O., French W.J.R., Schofield R., Wales S., Karoly D.J., Vohralik P., Dargaville R. (2014) Quasi-Stationary Rossby Waves in the Southern Extratropics: An Examination of Meteorological Reanalyses and Climate Model Simulations, Stratosphere-troposphere Processes and their Role in Climate (SPARC) 2014 General Assembly, Queenstown, New Zealand, 12-17 January 2014 .; [Ref: 15170]

Morgenstern O., Zeng G., Klekociuk A.R., Dennison F., McDonald A., Abraham L., Osprey A., O'Connor F. (2014) Recent Antarctic Climate Change and Its Relation to Stratospheric Ozone Depletion and Increases on Long-lived Greenhouse Gases, Stratosphere-troposphere Processes and their Role in Climate (SPARC) 2014 General Assembly, Queenstown, New Zealand, 12-17 January 2014 .; [Ref: 15172]

McDonald A.J., Dennison F., Morgenstern O., Klekociuk A.R. (2014) Patterns of Southern Hemisphere Climate Change and their Relationships, Stratosphere-troposphere Processes and their Role in Climate (SPARC) 2014 General Assembly, Queenstown, New Zealand, 12-17 January 2014 .; [Ref: 15173]

Tully M.B., Morgenstern O., Evans R.D., Klekociuk A.R., Rhodes S.K., Zeng G. (2014) Trends in Total Column Ozone from Australian and New Zealand Dobson Sites, Stratosphere-troposphere Processes and their Role in Climate (SPARC) 2014 General Assembly, Queenstown, New Zealand, 12-17 January 2014 .; [Ref: 15174]

Dennison F., McDonald A.J., Morgenstern O., Klekociuk A.R. (2014) Annular Modes and Stratosphere-Troposphere Coupling in Chemistry-Climate Models, Stratosphere-troposphere Processes and their Role in Climate (SPARC) 2014 General Assembly, Queenstown, New Zealand, 12-17 January 2014 .; [Ref: 15175]

Alexander S., Stone K., Klekociuk A., Morgenstern O., French J., Karoly D., Schofield R. (2014) The Australian Contribution to CCMI Part I: Evaluation of Polar Stratospheric Dynamics in ACCESS-CCM, Stratosphere-troposphere Processes and their Role in Climate (SPARC) 2014 General Assembly, Queenstown, New Zealand, 12-17 January 2014 .; [Ref: 15263]

Stone K., Schofield R., Rhodes S., Tully M., Karoly D. (2014) An Updated Retrieval of Ozone Profile Information from the Australian Dobson Observational Network, Stratosphere-troposphere Processes and their Role in Climate (SPARC) 2014 General Assembly, Queenstown, New Zealand, 12-17 January 2014 .; [Ref: 15264]

Stone K., Klekociuk A., French J., Schofield R., Morgenstern O., Karoly D. (2013) Initial results from the Australian contribution to CCMI, ARC Centre of Excellence for Climate System Science, 2013 Annual Workshop, Lorne, Victoria, Australia, 10-13 November 2013 .; [Ref: 15265]

O'Farrell S., Klekociuk A.R. (2014) Investigation of ACCESS climate models response to recent ozone perturbations over Antarctica and the Southern Ocean, Australian Meteorological and Oceanographic Society (AMOS) National Conference, Hobart, Australia, 12-14 February 2014 .; [Ref: 15177]

Klekociuk A.R., Stone K., Morgenstern O., French J., Karoly D., Schofield R., Alexander S. (2013) The Australian Contribution to CCMI: Early Results from ACCESS1.3c Runs, Chemistry-Climate Model Initiative (CCMI) 2013 Science Workshop, Boulder, United States, 14-16 May 2013 .; [Ref: 15269]

Schofield R., Hassim M., Lane T.P., Wohltmann I., Rex M. (2013) Modelling tropical tropopause layer convection processes driving stratospheric composition, Australian Meteorological and Oceanographic Society (AMOS) National Conference, Melbourne, Australia, 11-13 February 2013 ,; [Ref: 15270]

Klekociuk A.R., Alexander S.P. (2012) Southern polar stratospheric metrics of the Australian Community Climate and Earth System Simulator (ACCESS), 3rd International Conference on Earth System Modelling, Hamburg, Germany, 17-21 September 2012 .; [Ref: 15126]

Alexander S.P., Klekociuk A.R., Murphy D.J. (2012) High-resolution Antarctic observations of the stratospheric influence on the troposphere, 3rd International Conference on Earth System Modelling, Hamburg, Germany, 17-21 September 2012 .; [Ref: 15127]

Galbally I., Brunke E., Cuperiro M., Klekociuk A.R., Luppo S., Molloy S., Morgenstern O., Oltmans S., Scheel H.E., Tully M., Zeng G. (2013) The distribution and long term trends in ozone in the Southern Hemisphere extra-tropical boundary layer and free troposphere, Australian Meteorological and Oceanographic Society (AMOS) National Conference, Melbourne, Australia, 11-13 February 2013 .; [Ref: 14975]

Klekociuk A.R., Alexander S.P., French W.J.R. (2013) Assessment of polar atmospheric characteristics in Australian CMIP5 models, Australian Meteorological and Oceanographic Society (AMOS) National Conference, Melbourne, Australia, 11-13 February 2013 .; [Ref: 14976]

Tully M., Klekociuk A.R. (2013) Reprocessing of the Broadmeadows and Macquarie Island ozonesonde record as part of the SI2N Past Changes in the vertical distribution of ozone initiative, Australian Meteorological and Oceanographic Society (AMOS) National Conference, Melbourne, Australia, 11-13 February 2013 .; [Ref: 14977]

Alexander S.P., Klekociuk A.R., McDonald A.J., Pitts M.C. (2013) Quantifying the role of orographic gravity waves in influencing polar stratospheric cloud occurrence, Davos Atmosphere and Cryosphere Assembly 2013, Davos, Switzerland, 8-12 July 2013 .; [Ref: 15130]

Alexander S.P., Klekociuk A.R., Siddaway J., Grystai A., Melinivsky G., Petelina S., Schofield R., Stone K. (2013) Influences of circulation changes on the distribution of Antarctic stratospheric ozone, Davos Atmosphere and Cryosphere Assembly 2013, Davos, Switzerland, 8-12 July 2013 .; [Ref: 15132]

Stone K., Klekociuk A.R., Schofield R., Morgenstern O., Karoly D. (2013) The Australian Contribution to CCMI Part II: Model evaluation using Southern Hemispheric ozone observations, Chemistry-Climate Model Initiative Workshop 2013, Boulder, Colorado, USA, 14-16 May 2013 .; [Ref: 15134]

Schofield R., Avallone L., Kalnajs L., Hertzog A., Stone K., Karoly D., Rex M. (2013) Ozone loss rates from Concordiasi Balloon experiment comparison with recommended kinetics, World Climate Research Programme (WCRP) Special Workshop: Climatic Effects of Ozone Depletion in the Southern Hemisphere, Buenos Aires, Argentina, 25 February - 1 March 2013 .; [Ref: 15103]

Stone K., Schofield R., Dargaville R., Klekociuk A.R., Tully M., Morgenstern O., Emmerson K., Karoly D. (2012) A comparison of the ACCESS model with satellite and ozonesonde observations over Australia and Antarctica, ARC Centre of Excellence for Climate System Science First Annual Workshop, Hobart, Tasmania, 25-27 September 2012 .; [Ref: 14798]

Category 3: Verbal presentation

Galbally I.E., Brunke E.-G., Cuperiro M., Klekociuk A.R., Luppo S., Molloy S., Morgenstern O., Oltmans S.J., Scheel H.E., Tully M.B., Zeng G. (2012) Long-term Trends of Ozone in the Southern Hemisphere Extra-tropical Boundary Layer and Free Troposphere, 12th Open Science Conference of International Global Atmospheric Chemistry, Beijing, China, 17-21 September 2012 .; [Ref: 14799]

Krummel P.B., Fraser P.J., Klekociuk A.R., Tully M.B., Steele L.P., Trudinger C.M., Etheridge D.M., Derek N., O'Doherty S., Simmonds P.G., Miller B.R., Mühle J., Weiss R.F., Oram D.E., Prinn R.G., Wang H.J. (2012) The 2012 Ozone Hole and updated Equivalent Effective Stratospheric Chlorine data, Atmospheric Composition Observations and Modelling Conference incorporating the Cape Grim Annual Science Meeting 2012, South Durras, NSW, Australia, 28-30 November 2012 .; [Ref: 14971]

Galbally I., Brunke E., Cuperiro M., Klekociuk A.R., Luppo S., Molloy S., Morgenstern O., Oltmans S., Scheel H.-E., Tully M., Zeng G. (2012) Tropospheric ozone distribution and trends at Cape Grim and in the extra쳌-tropical Southern Hemisphere, Atmospheric Composition Observations and Modelling Conference incorporating the Cape Grim Annual Science Meeting 2012, South Durras, NSW, Australia, 28-30 November 2012 .; [Ref: 14972]

Klekociuk A.R., Siddaway J., Grytsai A., Milinevsky G., Alexander S., Petelina S., Schofield R., Stone K. (2013) Trends in the distribution of Antarctic stratospheric ozone: relationships with circulation changes, Australian Meteorological and Oceanographic Society (AMOS) National Conference, Melbourne, Australia, 11-13 February 2013 .; [Ref: 14973]

Schofield R., Lane T., Wohltmann I., Rex M. (2013) Tropical tropopause layer processes driving stratospheric composition - focus on polar ozone relevant species, XXXII SCAR and Open Science Conference, Portland, Oregon, USA, 13-25 July 2012 .; [Ref: 15104]

Avallone L., Schofield R., Hertzog A., Kalnajs L. (2012) Calculations of Ozone Loss Rates within the Antarctic “Ozone Hole” using Quasi-Lagrangian Measurements of Ozone made during the Concordiasi Long-duration Balloon Campaign, Quadrennial Ozone Symposium 2012, Toronto, Canada, 27-31 August .; [Ref: 15105]

Alexander S.P., Klekociuk A.R. (2013) Ground-based observations of Antarctic clouds using a Rayleigh LiDAR at Davis (69S, 78E), Davos Atmosphere and Cryosphere Assembly 2013, Davos, Switzerland, 8-12 July 2013 .; [Ref: 15129]

Tully M., Klekociuk A.R. (2012) Interannual variability in total ozone from a mid-latitude Southern Hemisphere site - the Melbourne Dobson record 1978-2012, Quadrennial Ozone Symposium 2012, Toronto, Canada, 27-31 August .; [Ref: 14796]

Schofield R., Frey W., Hassim M., Lane T.P., Rex M., Deckelmann H. (2013) Uncertainties due to Convection over the Maritime Continent: Implications for Stratospheric Sulfur, SPARC Workshop: Stratospheric Sulfur and its Role in Climate (SSiRC), Atlanta, Georgia, USA, 28-30 October 2013 .; [Ref: 15266]

Morgenstern O., Zeng G., Dean S., Rickard G., McDonald A., Stone K., Schofield R., Karoly D., Klekociuk A.R. (2013) Antarctic and Southern-Hemisphere climate change: The role of chemistry-climate models, Strategic Science in Antarctica Conference, Hobart, Australia, 24-26 June 2013 .; [Ref: 15268]

Stone K., Klekociuk A.R., French W.J.R., Schofield R., Morgenstern O., Karoly D. (2014) The Australian contribution to the Chemistry-Climate Model Initiative: results from the Ref-C1 hind cast simulation, Australian Meteorological and Oceanographic Society (AMOS) National Conference, Hobart, Australia, 12-14 February 2014 .; [Ref: 15176]

Alexander S.P., Klekociuk A.R., Murphy D.J., French W.J.R., Love P. (2013) Wave Dynamics in the Antarctic Region, Asia Oceania Geosciences Society 10th Annual Meeting, Brisbane, Queensland, Australia 24-28 June 2013 .; [Ref: 15141]

Klekociuk A.R., Nicely J., Wolfe G., Hanisco T.F., Deushi M., Duncan B.M., Haslerud A.S., Jöckel P., Josse B., Kinnison D.E., Manyin M.E., Morgenstern O., Murray L.T., Myhre G., Oman L.D., Pitari G., Pozzer A., Quaglia I., Revell L.E., Rozanov E., Salawitch R.J., Stenke A., Stone K., Strahan S., Tilmes S., Tost H., Westervelt D.M., Zeng G. (2019) Machine Learning Examination of Hydroxyl Radical Differences Between Chemistry-Climate Model and Chemical Transport Model Simulations for CCMI-1. Tri-MIP-athlon-2:, The second joint AerChem MIP RFMIP / PDRMIP Workshop in support of CMIP6, Princeton University, 11-14 June 2019. .; [Ref: 16175]

Ayarzagüena B., Oberländer-Hayn S., Langematz U., Abalichin J., Akiyoshi H., Hardiman S., Klekociuk A., Marchand M., Meul S., Michou M., Morgenstern O., Oman L., Stenke A., Shibata S. (2016) Response of sea surface temperature to climate change and its influence on the wintertime polar vortex in chemistry-climate models, SPARC Workshop Stratospheric Change and its Role in Climate Prediction (SHARP), Berlin, Germany, 16-19 February, 2016 .; [Ref: 15754]

Ayarzagüena B., Langematz U., Polvani L.M., Abalichin J., Akiyoshi A., Klekociuk A.R., Michou M., Morgenstern O., Oman L.D., Shibata K. (2015) Future changes in Major Stratospheric Warmings in CCMI models, American Meteorological Society 95th Annual Meeting, Phoenix, USA, 3-8 January 2015, .; [Ref: 15434]

O'Farrell S., Klekociuk A.R., French W.J.R. (2014) Investigation of ACCESS climate models response to recent ozone perturbations over Antarctica and the Southern Ocean, XXXIII SCAR Biennial Meetings and Open Science Conference, Auckland, New Zealand, 23 August-3 September 2014 .; [Ref: 15432]