Extreme temperature and precipitation response to solar dimming and stratospheric aerosol geoengineering

Abstract. We examine extreme temperature and precipitation under two potential geoengineering methods forming part of the Geoengineering Model Intercomparison Project (GeoMIP). The solar dimming experiment G1 is designed to completely offset the global mean radiative forcing due to a CO2-quadrupling experiment (abrupt4 × CO2), while in GeoMIP experiment G4, the radiative forcing due to the representative concentration pathway 4.5 (RCP4.5) scenario is partly offset by a simulated layer of aerosols in the stratosphere. Both G1 and G4 geoengineering simulations lead to lower minimum temperatures (TNn) at higher latitudes and on land, primarily through feedback effects involving high-latitude processes such as snow cover, sea ice and soil moisture. There is larger cooling of TNn and maximum temperatures (TXx) over land compared with oceans, and the land–sea cooling contrast is larger for TXx than TNn. Maximum 5-day precipitation (Rx5day) increases over subtropical oceans, whereas warm spells (WSDI) decrease markedly in the tropics, and the number of consecutive dry days (CDDs) decreases in most deserts. The precipitation during the tropical cyclone (hurricane) seasons becomes less intense, whilst the remainder of the year becomes wetter. Stratospheric aerosol injection is more effective than solar dimming in moderating extreme precipitation (and flooding). Despite the magnitude of the radiative forcing applied in G1 being ∼ 7.7 times larger than in G4 and despite differences in the aerosol chemistry and transport schemes amongst the models, the two types of geoengineering show similar spatial patterns in normalized differences in extreme temperatures changes. Large differences mainly occur at northern high latitudes, where stratospheric aerosol injection more effectively reduces TNn and TXx. While the pattern of normalized differences in extreme precipitation is more complex than that of extreme temperatures, generally stratospheric aerosol injection is more effective in reducing tropical Rx5day, while solar dimming is more effective over extra-tropical regions.

[1]  Duoying Ji,et al.  Global streamflow and flood response to stratospheric aerosol geoengineering , 2018, Atmospheric Chemistry and Physics.

[2]  Duoying Ji,et al.  A statistical examination of the effects of stratospheric sulfate geoengineering on tropical storm genesis , 2018, Atmospheric Chemistry and Physics.

[3]  Duoying Ji,et al.  Tropical atmospheric circulation response to the G1 sunshade geoengineering radiative forcing experiment , 2018, Atmospheric Chemistry and Physics.

[4]  D. Schrag,et al.  Regional Climate Variability Under Model Simulations of Solar Geoengineering , 2017 .

[5]  Ben Kravitz,et al.  Marine cloud brightening – as effective without clouds , 2017 .

[6]  K. Emanuel,et al.  Impacts of hemispheric solar geoengineering on tropical cyclone frequency , 2017, Nature Communications.

[7]  Simone Tilmes,et al.  Impacts of stratospheric sulfate geoengineering on tropospheric ozone , 2017 .

[8]  Shingo Watanabe,et al.  Response to marine cloud brightening in a multi-model ensemble , 2017 .

[9]  Shingo Watanabe,et al.  Shortwave radiative forcing, rapid adjustment, and feedback to the surface by sulfate geoengineering: analysis of the Geoengineering Model Intercomparison Project G4 scenario , 2017 .

[10]  S. Tilmes,et al.  Impact of the GeoMIP G1 sunshade geoengineering experiment on the Atlantic meridional overturning circulation , 2017 .

[11]  Trude Storelvmo,et al.  Thermodynamic and dynamic responses of the hydrological cycle to solar dimming , 2016 .

[12]  C. Tebaldi,et al.  What would it take to achieve the Paris temperature targets? , 2016 .

[13]  Shingo Watanabe,et al.  The Geoengineering Model Intercomparison Project Phase 6 (GeoMIP6): simulation design and preliminary results , 2015 .

[14]  B. Kravitz,et al.  Atlantic hurricane surge response to geoengineering , 2015, Proceedings of the National Academy of Sciences.

[15]  Ulrike Niemeier,et al.  What is the limit of climate engineering by stratospheric injection of SO 2 , 2015 .

[16]  Thomas Birner,et al.  Changes in the width of the tropical belt due to simple radiative forcing changes in the GeoMIP simulations , 2015 .

[17]  Duoying Ji,et al.  Impacts, effectiveness and regional inequalities of the GeoMIP G1 to G4 solar radiation management scenarios , 2015 .

[18]  E. Highwood,et al.  Stratospheric dynamics and midlatitude jets under geoengineering with space mirrors and sulfate and titania aerosols , 2015 .

[19]  Johannes Quaas,et al.  Climate extremes in multi-model simulations of stratospheric aerosol and marine cloud brightening climate engineering , 2014 .

[20]  Duoying Ji,et al.  Description and basic evaluation of Beijing Normal University Earth System Model (BNU-ESM) version 1 , 2014 .

[21]  V. Aquila,et al.  Stratospheric ozone response to sulfate geoengineering: Results from the Geoengineering Model Intercomparison Project (GeoMIP) , 2014 .

[22]  T. Mauritsen,et al.  Arctic amplification dominated by temperature feedbacks in contemporary climate models , 2014 .

[23]  B. Kravitz,et al.  Arctic cryosphere response in the Geoengineering Model Intercomparison Project G3 and G4 scenarios , 2014 .

[24]  J. Kay,et al.  Can regional climate engineering save the summer Arctic sea ice? , 2014 .

[25]  O. Boucher,et al.  Arctic sea ice and atmospheric circulation under the GeoMIP G1 scenario , 2014 .

[26]  William M. Putman,et al.  Configuration and assessment of the GISS ModelE2 contributions to the CMIP5 archive , 2014 .

[27]  Mark Lawrence,et al.  An overview of the Geoengineering Model Intercomparison Project (GeoMIP) , 2013 .

[28]  A. Robock,et al.  Arctic Cryosphere Response in the Geoengineering Model Intercomparison Project (GeoMIP) G3 and G4 scenarios , 2013 .

[29]  Ben Kravitz,et al.  A multimodel examination of climate extremes in an idealized geoengineering experiment , 2013 .

[30]  Hauke Schmidt,et al.  Solar irradiance reduction via climate engineering: Impact of different techniques on the energy balance and the hydrological cycle , 2013 .

[31]  P. Rasch,et al.  Sea spray geoengineering experiments in the geoengineering model intercomparison project (GeoMIP): Experimental design and preliminary results , 2013 .

[32]  Shingo Watanabe,et al.  The hydrological impact of geoengineering in the Geoengineering Model Intercomparison Project (GeoMIP) , 2013 .

[33]  Shingo Watanabe,et al.  The impact of abrupt suspension of solar radiation management (termination effect) in experiment G2 of the Geoengineering Model Intercomparison Project (GeoMIP) , 2013 .

[34]  P. Rasch,et al.  Climate model response from the Geoengineering Model Intercomparison Project (GeoMIP) , 2013 .

[35]  K. Emanuel.  Downscaling CMIP5 climate models shows increased tropical cyclone activity over the 21st century , 2013, Proceedings of the National Academy of Sciences.

[36]  W. Lau,et al.  A canonical response of precipitation characteristics to global warming from CMIP5 models , 2013 .

[37]  A. Kirkevåg,et al.  The Norwegian Earth System Model, NorESM1-M – Part 1: Description and basic evaluation of the physical climate , 2013 .

[38]  J. Chiang,et al.  Increase in the range between wet and dry season precipitation , 2013 .

[39]  F. Zwiers,et al.  Climate extremes indices in the CMIP5 multimodel ensemble: Part 2. Future climate projections , 2013 .

[40]  F. Zwiers,et al.  Climate extremes indices in the CMIP5 multimodel ensemble: Part 1. Model evaluation in the present climate , 2013 .

[41]  R. Vose,et al.  Global Land-Based Datasets for Monitoring Climatic Extremes , 2013 .

[42]  A. Robock,et al.  Coupled Model Intercomparison Project 5 (CMIP5) simulations of climate following volcanic eruptions , 2012 .

[43]  Mark Lawrence,et al.  Solar irradiance reduction to counteract radiative forcing from a quadrupling of CO2: climate responses simulated by four earth system models , 2012 .

[44]  Karl E. Taylor,et al.  An overview of CMIP5 and the experiment design , 2012 .

[45]  D. Easterling,et al.  Changes in climate extremes and their impacts on the natural physical environment , 2012 .

[46]  A. Evan.  Atlantic hurricane activity following two major volcanic eruptions , 2012 .

[47]  S. Seneviratne,et al.  Global changes in extreme events: regional and seasonal dimension , 2012, Climatic Change.

[48]  D. Radinović,et al.  Criteria for heat and cold wave duration indexes , 2012, Theoretical and Applied Climatology.

[49]  Andy Ridgwell,et al.  Climatic effects of surface albedo geoengineering , 2011 .

[50]  C. Jones,et al.  Development and evaluation of an Earth-System model - HadGEM2 , 2011 .

[51]  G. Hegerl,et al.  Indices for monitoring changes in extremes based on daily temperature and precipitation data , 2011 .

[52]  R. Corlett,et al.  Impacts of warming on tropical lowland rainforests. , 2011, Trends in ecology & evolution.

[53]  S. Emori,et al.  MIROC-ESM 2010: model description and basic results of CMIP5-20c3m experiments , 2011 .

[54]  A. Ryaboshapko,et al.  Climate response to aerosol injection at different stratospheric locations , 2011 .

[55]  K. Calvin,et al.  The RCP greenhouse gas concentrations and their extensions from 1765 to 2300 , 2011 .

[56]  Leon D. Rotstayn,et al.  The CSIRO Mk3L climate system model version 1.0 – Part 1: Description and evaluation , 2011 .

[57]  K. Taylor,et al.  The Geoengineering Model Intercomparison Project (GeoMIP) , 2011 .

[58]  Olivier Boucher,et al.  A comparison of the climate impacts of geoengineering by stratospheric SO2 injection and by brightening of marine stratocumulus cloud , 2011 .

[59]  K. Denman,et al.  Carbon emission limits required to satisfy future representative concentration pathways of greenhouse gases , 2011 .

[60]  D. Weisenstein,et al.  Efficient formation of stratospheric aerosol for climate engineering by emission of condensible vapor from aircraft , 2010 .

[61]  I. Simmonds,et al.  The central role of diminishing sea ice in recent Arctic temperature amplification , 2010, Nature.

[62]  Andrew Gettelman,et al.  Impact of geoengineered aerosols on the troposphere and stratosphere , 2009 .

[63]  Georgiy L. Stenchikov,et al.  Regional climate responses to geoengineering with tropical and Arctic SO2 injections , 2008 .

[64]  K. Taylor,et al.  Impact of geoengineering schemes on the global hydrological cycle , 2008, Proceedings of the National Academy of Sciences.

[65]  Jonathan M. Gregory,et al.  Mechanisms for the land/sea warming contrast exhibited by simulations of climate change , 2008 .

[66]  N. Diffenbaugh,et al.  Heat stress intensification in the Mediterranean climate change hotspot , 2007 .

[67]  D. Stone,et al.  Testing the Clausius–Clapeyron constraint on changes in extreme precipitation under CO2 warming , 2007 .

[68]  J. Gregory,et al.  Land/sea warming ratio in response to climate change: IPCC AR4 model results and comparison with observations , 2007 .

[69]  G. Meehl,et al.  Going to the Extremes , 2006 .

[70]  Thomas C. Peterson,et al.  Changes in daily temperature and precipitation extremes in central and south Asia , 2006 .

[71]  P. Crutzen.  Albedo Enhancement by Stratospheric Sulfur Injections: A Contribution to Resolve a Policy Dilemma? , 2006 .

[72]  Randal D. Koster,et al.  Soil Moisture Memory in AGCM Simulations: Analysis of Global Land–Atmosphere Coupling Experiment (GLACE) Data , 2004 .

[73]  M. Allen,et al.  Constraints on future changes in climate and the hydrologic cycle , 2002, Nature.

[74]  M. Haylock,et al.  Observed coherent changes in climatic extremes during the second half of the twentieth century , 2002 .

[75]  Philip W. Jones.  First- and Second-Order Conservative Remapping Schemes for Grids in Spherical Coordinates , 1999 .

[76]  J. Latham,et al.  Control of global warming? , 1990, Nature.

[77]  Q. Wang.  Interactive comment on “ A statistical examination of the effects of stratospheric sulphate geoengineering on tropical storm genesis ” by Qin , 2018 .

[78]  E. Highwood,et al.  Weakened tropical circulation and reduced precipitation in response to geoengineering , 2014 .

[79]  Kerry A. Emanuel,et al.  Downscaling CMIP 5 climate models shows increased tropical cyclone activity over the 21 st century , 2013 .

[80]  Corinne Le Quéré,et al.  Climate Change 2013: The Physical Science Basis , 2013 .

[81]  Corinne Le Quéré,et al.  Climate Change 2013: The Physical Science Basis , 2013 .

[82]  T. Stocker,et al.  Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation. A Special Report of Working Groups I and II of IPCC Intergovernmental Panel on Climate Change , 2012 .

[83]  T. Takemura,et al.  Geoscientific Model Development MIROC-ESM 2010 : model description and basic results of CMIP 5-20 c 3 m experiments , 2011 .

[84]  C. Jones,et al.  Interactive comment on “ Development and evaluation of an Earth-system model – HadGEM 2 ” , 2011 .

[85]  G. Meehl,et al.  An intercomparison of model-simulated historical and future changes in extreme events , 2007 .

[86]  J. Feichter,et al.  Atmospheric Chemistry and Physics Global Indirect Aerosol Effects: a Review , 2005 .

[87]  P. Bainum,et al.  Space utilization and applications in the pacific , 1990 .

[88]  E. Antevs,et al.  CLIMATIC CHANGES. , 1923, Science.