Boucher O, Randall D, Artaxo P, Bretherton C, Feingold G, Forster P, et al. Clouds and aerosols. In: Stocker TF, Qin D, Plattner GK, Tignor M, Allen SK, Boschung J, et al., editors. Climate change 2013: the physical science basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK, and New York, NY, USA: Cambridge University Press; 2013. pp. 571–658.
Kay JE, Wood R. Timescale analysis of aerosol sensitivity during homogeneous freezing and implications for upper tropospheric water vapor budgets. Geophys Res Lett. 2008;35:L10809.
Twomey S. Pollution and the planetary albedo. Atmos Environ. 1974;8:1251–8.
Kärcher B, Lohmann U. A parameterization of cirrus cloud formation: heterogeneous freezing. J Geophys Res. 2003;108:4402.
Albrecht B. Aerosols, cloud microphysics, and fractional cloudiness. Science. 1989;245:1227–30.
Xue H, Feingold G. Large-eddy simulations of trade wind cumuli: investigation of aerosol indirect effects. J Atmos Sci. 2006;63:1605–22.
Wood R. Cancellation of aerosol indirect effects in marine stratocumulus through cloud thinning. J Atmos Sci. 2007;64:2657–69.
Sandu I, Brenguier JL, Geoffroy O, Thouron O, Masson V. Aerosols impacts on the diurnal cycle of marine stratocumulus. J Atmos Sci. 2008;65:2705–18.
Seifert A, Heus T, Pincus R, Stevens B. Large-eddy simulation of the transient and near-equilibrium behavior of precipitating shallow convection. J Adv Model Earth Syst. 2015. doi:10.1002/2015MS000489.
Pincus R, Baker MB. Effect of precipitation on the albedo susceptibility of clouds in the marine boundary layer. Nature. 1994;372:250–2.
Fan J, Leung LR, Rosenfeld D, Chen Q, Li Z, Zhang J, et al. Microphysical effects determine macrophysical response for aerosol impacts on deep convective clouds. Proc Natl Acad Sci U S A. 2013;110:E4581–90.
Savic-Jovcic V, Stevens B. The structure and mesoscale organization of precipitating stratocumulus. J Atmos Sci. 2008;65:1587–605.
Small JD, Chuang PY, Feingold G, Jiang H. Can aerosols decrease cloud lifetime? Geophys Res Lett. 2009;36:L16806.
Ackerman AS, Kirkpatrick MP, Stevens DE, Toon OB. The impact of humidity above stratiform clouds on indirect aerosol climate forcing. Nature. 2004;432:1014–7.
Lohmann U. A glaciation indirect aerosol effect caused by soot aerosols. Geophys Res Lett. 2002;29:1052–6.
Storelvmo T, Kristjánsson JE, Lohmann U, Iversen T, Kirkevåg A, Seland O. Modeling of the Wegener-Bergeron-Findeisen process—implications for aerosol indirect effects. Environ Res Lett. 2008;3:045001.
Storelvmo T, Kristjánsson JE, Lohmann U, Iversen T, Kirkevåg A, Seland O. Corrigendum: modeling of the Wegener-Bergeron-Findeisen process—implications for aerosol indirect effects. Environ Res Lett. 2010;5:019801.
Ackerman AS, Toon OB, Stephens DE, Heymsfield AJ, Ramanathan V, Welton EJ. Reduction of tropical cloudiness by soot. Science. 2000;288:1042–7.
Koch D, Del Genio AD. Black carbon semi-direct effects on cloud cover: review and synthesis. Atmos Chem Phys. 2010;10:7685–96.
Sakaeda N, Wood R, Rasch PJ. Direct and semidirect aerosol effects of Southern African biomass burning aerosol. J Geophys Res. 2011;116:D12205.
Wilcox EM. Direct and semi-direct radiative forcing of smoke aerosols over clouds. Atmos Chem Phys. 2012;12:139–49.
Stevens B, Feingold G. Untangling aerosol effects on clouds and precipitation in a buffered system. Nature. 2009;461:607–13.
Quaas J, Bony S, Collins WD, Donner L, Illingworth AJ, Jones A, et al. In: Current understanding and quantification of clouds in the changing climate system and strategies for reducing critical uncertainties. MIT, Cambridge, ISBN 9780262012874; 2009. pp. 557–573.
Lohmann U, Rotstayn L, Storelvmo T, Jones A, Menon S, Quaas J, et al. Total aerosol effect: forcing or radiative flux perturbation. Atmos Chem Phys. 2010;10:3235–46.
Gregory J, Webb M. Tropospheric adjustment induces a cloud component in CO2 forcing. J Clim. 2008;21:58–71.
Zelinka MD, Andrews T, Forster PM, Taylor KE. Quantifying components of aerosol-cloud-radiation interactions in climate models. J Geophys Res. 2014;119:7599–615.
Sherwood SC, Bony S, Boucher O, Bretherton C, Forster PM, Gregory JM, et al. Adjustments in the forcing-feedback framework for understanding climate change. Bull Am Meteorol Soc. 2015;96:217–28.
Cherian R, Venkataraman C, Quaas J, Ramachandran S. GCM simulations of aerosol extinction, heating and effects on precipitation over India. J Geophys Res. 2013;118:2938–55.
Twomey S, Warner J. Comparison of measurements of cloud droplets and cloud nuclei. J Atmos Sci. 1967;24:702–3.
Feingold G, Eberhard WL, Veron DE, Previdi M. First measurements of the Twomey indirect effect using ground-based remote sensors. Geophys Res Lett. 2003;30:1287.
Werner F, Ditas F, Siebert H, Simmel M, Wehner B, Pilewskie P, et al. Twomey effect observed from collocated microphysical and remote sensing measurements over shallow cumulus. J Geophys Res. 2014;119:1534–45.
Lohmann U, Lesins G. Stronger constraints on the anthropogenic indirect aerosol effect. Science. 2002;298:1012–5.
Sekiguchi M, Nakajima T, Suzuki K, Kawamoto K, Higurashi A, Rosenfeld D, et al. A study of the direct and indirect effects of aerosols using global satellite data sets of aerosol and cloud parameters. J Geophys Res. 2003;108:4699.
Quaas J, Boucher O, Bréon FM. Aerosol indirect effects in POLDER satellite data and in the Laboratoire de Météorologie Dynamique-Zoom (LMDZ) general circulation model. J Geophys Res. 2004;109:D08205.
Quaas J, Boucher O. Constraining the first aerosol indirect radiative forcing in the LMDZ GCM using POLDER and MODIS satellite data. Geophys Res Lett. 2005;32(L17814).
Quaas J, Boucher O, Lohmann U. Constraining the total aerosol indirect effect in the LMDZ and ECHAM4 GCMs using MODIS satellite data. Atmos Chem Phys. 2006;6:947–55.
Suzuki K, Golaz JC, Stephens GL. Evaluating cloud tuning in a climate model with satellite observations. Geophys Res Lett. 2013;40:4464–8.
Quaas J, Boucher O, Bellouin N, Kinne S. Satellite-based estimate of the direct and indirect aerosol climate forcing. J Geophys Res. 2008;113(D05204).
Quaas J, Ming Y, Menon S, Takemura T, Wang M, Penner J, et al. Aerosol indirect effects—general circulation model intercomparison and evaluation with satellite data. Atmos Chem Phys. 2009;9:8697–717.
Chen YC, Christensen MW, Stephens GL, Seinfeld JH. Satellite-based estimate of global aerosol-cloud radiative forcing by marine warm clouds. Nat Geosci. 2014;7:643–6.
Bellouin N, Jones A, Haywood J, Christopher SA. Updated estimate of aerosol direct radiative forcing from satellite observations and comparison against the Hadley Centre climate model. J Geophys Res. 2008;113:D10205.
Carslaw KS, Lee LA, Reddington CL, Pringle KJ, Rap A, Forster PM, et al. Large contribution of natural aerosols to uncertainty in indirect forcing. Nature. 2013;503:67–71.
Schaefer VJ. The production of ice crystals in a cloud of supercooled water droplets. Science. 1946;104:457–9.
Simpson J, Simpson RH, Andrews DA, Eaton MA. Experimental cumulus dynamics. Rev Geophys. 1965;3:387–431.
Langmuir I. The production of rain by a chain reaction in cumulus clouds at temperatures above freezing. J Meteorol. 1948;5:175–92.
Bowen EG. A new method of stimulating convective clouds to produce rain and hail. QJR Meteorol Soc. 1952;78:37–45.
Biswas KR, Kapoor RK, Kanuga KK, Ramana Murty BV. Cloud seeding experiment using common salt. J Appl Meteorol. 1967;6:914–23.
National Research Council. Critical issues in weather modification research. Washington D.C., USA: The National Academies Press; 2003. ISBN 978-0-309-09053-7.
Levin Z, Halfon N, Alpert P. Reassessment of rain enhancement experiments and operations in Israel including synoptic considerations. Atmos Res. 2010;97:513–25.
Ghate VP, Albrecht BA, Kollias P, Jonsson HH, Breed DW. Cloud seeding as a technique for studying aerosol-cloud interactions in marine stratocumulus. Geophys Res Lett. 2007;34:L14807.
Russell LM, Sorooshian A, Seinfeld JH, Albrecht BA, Nenes A, Ahlm L, et al. Eastern pacific emitted aerosol cloud experiment. Bull Am Meteorol Soc. 2013;94:709–29.
Latham J, Bower K, Choularton T, Coe H, Connolly P, Cooper G, et al. Marine cloud brightening. Philos Transact A Math Phys Eng Sci. 2012;370:4217–62.
Wood R, Ackerman TP. Defining success and limits of field experiments to test geoengineering by marine cloud brightening. Clim Chang. 2013;121:459–72.
Conover JH. Anomalous cloud lines. J Atmos Sci. 1966;23:778–85.
Coakley Jr JA, Durkee PA, Nielsen K, Taylor JP, Platnick S, Albrecht BA, et al. The appearance and disappearance of ship tracks on large spatial scales. J Atmos Sci. 2000;57:2765–78.
Durkee PA, Chartier RE, Brown A, Trehubenko EJ, Rogerson SD, Skupniewicz C, et al. Composite ship track characteristics. J Atmos Sci. 2000;57:2542–53.
Noone KJ, Öström E, Ferek RJ, Garrett T, Hobbs PV, Johnson DW, et al. A case study of ships forming and not forming tracks in moderately polluted clouds. J Atmos Sci. 2000;57:2729–47.
Coakley Jr JA, Bernstein RL, Durkee PA. Effect of ship-stack effluents on cloud reflectivity. Science. 1987;237:1020–2022.
Wang H, Feingold G. Modeling mesoscale cellular structures and drizzle in marine stratocumulus. Part II: the microphysics and dynamics of the boundary region between open and closed cells. J Atmos Sci. 2009;66:3257–75.
Goren T, Rosenfeld D. Satellite observations of ship emission induced transitions from broken to closed cell marine stratocumulus over large areas. J Geophys Res. 2012;117:D17206.
Goren T, Rosenfeld D. Decomposing aerosol cloud radiative effects into cloud cover, liquid water path and Twomey components in marine stratocumulus. Atmos Res. 2014;138:378–93.
Lauer A, Eyring V, Hendricks J, Jöckel P, Lohmann U. Global model simulations of the impact of ocean-going ships on aerosols, clouds, and the radiation budget. Atmos Chem Phys. 2007;7:5061–79.
Peters K, Quaas J, Stier P, Graßl H. Processes limiting the emergence of detectable aerosol indirect effects on tropical warm clouds in global aerosol-climate model and satellite data. Tellus B. 2014;66:24054.
Campmany E, Grainger RG, Dean SM, Sayer AM. Automatic detection of ship tracks in ATSR-2 satellite imagery. Atmos Chem Phys. 2009;9:1899–905.
Schreier M, Mannstein H, Eyring V, Bovensmann H. Global ship track distribution and radiative forcing from 1 year of AATSR data. Geophys Res Lett. 2007;34:L17814.
Schreier M, Joxe L, Eyring V, Bovensmann H, Burrows JP. Ship track characteristics derived from geostationary satellite observations on the west coast of southern Africa. Atmos Res. 2010;95:32–9.
Peters K, Quaas J, Graßl H. A search for large-scale effects of ship emissions on clouds and radiation in satellite data. J Geophys Res. 2011;116:D24205.
Capaldo K, Corbett JJ, Kasibhatla P, Fischbeck P, Pandis SN. Effects of ship emissions on sulphur cycling and radiative climate forcing over the ocean. Nature. 1999;400:743–6.
Ackerman AS, Toon OB, Taylor JP, Johnson DW, Hobbs PV, Ferek RJ. Effects of aerosols on cloud albedo: evaluation of Twomey’s parameterization of cloud susceptibility using measurements of ship tracks. J Atmos Sci. 2000;57:2684–95.
Chen YC, Christensen MW, Xue L, Sorooshian A, Stephens GL, Rasmussen RM, et al. Occurrence of lower cloud albedo in ship tracks. Atmos Chem Phys. 2012;12:8223–35.
Christensen MW, Coakley Jr JA, Tahnk WR. Morning-to-afternoon evolution of marine stratus polluted by underlying ships: implications for the relative lifetimes of polluted and unpolluted clouds. J Atmos Sci. 2009;66:2097–106.
Christensen MW, Suzuki K, Zambri B, Stephens GL. Ship track observations of a reduced shortwave aerosol indirect effect in mixed-phase clouds. Geophys Res Lett. 2014;41:6970–7. This study is an excellent example on how the careful, statistical analysis of ship tracks is useful to assess processes of aerosol-cloud interactions.
Coakley Jr JA, Walsh CD. Limits to the aerosol indirect radiative effect derived from observations of ship tracks. J Atmos Sci. 2002;59:668–80.
Christensen MW, Stephens GL. Microphysical and macrophysical responses of marine stratocumulus polluted by underlying ships: evidence of cloud deepening. J Geophys Res. 2011;116:D03201.
Boucher O. Air traffic may increase cirrus cloudiness. Nature. 1999;397:30–1.
Burkhardt U, Kärcher B. Global radiative forcing from contrail cirrus. Nat Clim Chang. 2011;1:54–8.
Hendricks J, Kärcher B, Lohmann U, Ponater M. Do aircraft black carbon emissions affect cirrus clouds on the global scale? Geophys Res Lett. 2005;32:L12814.
Ming Y, Ramaswamy V. A model investigation of aerosol-induced changes in tropical circulation. J Clim. 2011;24:5125–33.
Schwartz SE. Are global cloud albedo and climate controlled by marine phytoplankton? Nature. 1988;336:441–5.
Kishcha P, Starobinets B, Kalashnikova O, Long CN, Alpert P. Variations of meridional aerosol distribution and solar dimming. J Geophys Res. 2009;114:D00D14.
Feng Y, Ramanathan V. Investigation of aerosol-cloud interactions using a chemical transport model constrained by satellite observations. Tellus. 2010;62B:69–86.
Han Q, Rossow WB, Lacis AA. Near-global survey of effective droplet radii in liquid water clouds using ISCCP data. J Clim. 1994;7:465–97.
Stevens B. Rethinking the lower bound on aerosol radiative forcing. J Clim. 2015;28:4794–819. This study exploits the hemispheric contrast to infer constraints on the magnitude of the anthropogenic aerosol radiative forcing.
Longley ID, Inglis DWF, Gallagher MW, Williams PI, Allan JD, Coe H. Using NOx and CO monitoring data to indicate fine aerosol number concentrations and emission factors in three UK conurbations. Atmos Environ. 2005;39:5157–69.
Bian H, Chin M, Kawa SR, Yu H, Diehl T, Kucsera T. Multiscale carbon monoxide and aerosol correlations from satellite measurements and the GOCART model: implication for emissions and atmospheric evolution. J Geophys Res. 2010;115, D07302.
Edwards DP, Emmons LK, Hauglustaine DA, Chu DA, Gille JC, Kaufman YJ, et al. Observations of carbon monoxide and aerosols from the Terra satellite: Northern Hemisphere variability. J Geophys Res. 2004;109:D24202.
Avey L, Garrett TJ, Stohl A. Evaluation of the aerosol indirect effect using satellite, tracer transport model, and aircraft data from the International Consortium for Atmospheric Research on Transport and Transformation. J Geophys Res. 2007;112:D10S33.
Chameides WL, Luo C, Saylor R, Streets D, Huang Y, Bergin M, et al. Correlation between model-calculated anthropogenic aerosols and satellite-derived cloud optical depths: indication of indirect effect? J Geophys Res. 2002;107:4085.
Schwartz SE, Harshvardhan, Benkovitz CM. Influence of anthropogenic aerosol on cloud optical depth and albedo shown by satellite measurements and chemical transport modeling. Proc Natl Acad Sci U S A. 2002;99:1784–9.
Kawamoto K, Hayasaka T, Uno I, Ohara T. A correlative study on the relationship between modeled anthropogenic aerosol concentration and satellite-observed cloud properties over east Asia. J Geophys Res. 2006;111:D19201.
Beirle S, Platt U, Wenig M, Wagner T. Weekly cycle of NO2 by GOME measurements: a signature of anthropogenic sources. Atmos Chem Phys. 2003;3:2225–32.
Gordon AH. Weekdays warmer than weekends? Nature. 1994;367:324–5.
Cerveny RS, Balling Jr RC. Weekly cycles of air pollutants, precipitation and tropical cyclones in the coastal NW Atlantic region. Nature. 1998;394:561–3.
Bäumer D, Vogel B. An unexpected pattern of distinct weekly periodicities in climatological variables in Germany. Geophys Res Lett. 2007;34:L03819.
Sanchez-Lorenzo A, Laux P, Hendricks-Franssen HJ, Georgoulias AK, Calbó J, Vogl S, et al. Assessing large-scale weekly cycles in meteorological variables: a review. Atmos Chem Phys. 2012;12:5755–71. This article provides a comprehensive review about weekly cycles and the challenges in clearly identifying these as well as in exploiting the information to gain knowledge about aerosol effects.
Quaas J, Boucher O, Jones A, Weedon GP, Kieser J, Joos H. Exploiting the weekly cycle as observed over Europe to analyse aerosol indirect effects in two climate models. Atmos Chem Phys. 2009;9:8493–501.
Vestreng V, Myhre G, Fagerli H, Reis S, Tarrasón L. Twenty-five years of continuous sulphur dioxide emission reduction in Europe. Atmos Chem Phys. 2007;7:3663–81.
Liepert BG. Observed reductions in surface solar radiation in the United States and worldwide from 1961 to 1990. Geophys Res Lett. 2002;29(10). doi:10.1029/2002GL014913.
Wild M, Gilgen H, Roesch A, Ohmura A, Long CN, Dutton EG, et al. From dimming to brightening: decadal changes in solar radiation at Earth’s surface. Science. 2005;308:847–50.
Vautard R, Yiou P, van Oldenborgh GJ. Decline of fog, mist and haze in Europe over the past 30 years. Nat Geosci. 2009;2:115–9.
Yang X, Yao Z, Li Z, Fan T. Heavy air pollution suppresses summer thunderstorms in Central China. J Atmos Sol-Terr Phys. 2013;95-96:28–40.
Cherian R, Quaas J, Salzmann M, Wild M. Pollution trends over Europe constrain global aerosol forcing as simulated by climate models. Geophys Res Lett. 2014;41:2176–81. This article is a prime example on how to exploit analysis-observed trends in order to constrain the aerosol radiative forcing.
Quaas J, Boucher O, Dufresne JL, Le Treut H. Impacts of greenhouse gases and aerosol direct and indirect effects on clouds and radiation in atmospheric GCM simulations of the 1930–1989 period. Clim Dyn. 2004;23:779–89.
Bollasina M, Ming Y, Ramaswamy V. Anthropogenic aerosols and the weakening of the South Asian summer monsoon. Science. 2011;334:502–5.
Salzmann M, Weser H, Cherian R. Robust response of Asian summer monsoon to anthropogenic aerosols in CMIP5 models. J Geophys Res. 2014;119:11321–37.
Rotstayn LD, Lohmann U. Tropical rainfall trends and the indirect aerosol effect. J Clim. 2002;15:2103–16.
Booth BBB, Dunstone NJ, Halloran PR, Andrews T, Bellouin N. Aerosols implicated as a prime driver of twentieth-century North Atlantic climate variability. Nature. 2012;484:228–32.
Travis DJ, Carleton AM, Lauritsen RG. Contrails reduce daily temperature range. Nature. 2002;418:601.
Travis DJ, Carleton AM, Lauritsen RG. Regional variations in U.S. diurnal temperature range for the 11-14 September 2001 aircraft groundings: evidence of jet contrail influence on climate. J Clim. 2004;17:1123–34.
Gao Y, Liu X, Zhao C, Zhang M. Emission controls versus meteorological conditions in determining aerosol concentrations in Beijing during the 2008 Olympic Games. Atmos Chem Phys. 2011;11:12437–51.
Cermak J, Knutti R. Beijing Olympics as an aerosol field experiment. Geophys Res Lett. 2009;36:L10806.
Gong DY, Wang W, Qian Y, Bai W, Guo Y, Mao R. Observed holiday aerosol reduction and temperature cooling over East Asia. J Geophys Res. 2014;119:6306–24.
Saha U, Talukdar S, Jana S, Maitra A. Effects of air pollution on meteorological parameters during Deepawali festival over an Indian urban metropolis. Atmos Environ. 2014;98:530–9.
Stephens GL, Li J, Wild M, Clayson CA, Loeb N, Kato S, et al. An update on Earth’s energy balance in light of the latest global observations. Nat Geosci. 2012;5:691–6.