Volcanic forcing for climate modeling: a new microphysics-based data set covering years 1600–present

Abstract. As the understanding and representation of the impacts of volcanic eruptions on climate have improved in the last decades, uncertainties in the stratospheric aerosol forcing from large eruptions are now linked not only to visible optical depth estimates on a global scale but also to details on the size, latitude and altitude distributions of the stratospheric aerosols. Based on our understanding of these uncertainties, we propose a new model-based approach to generating a volcanic forcing for general circulation model (GCM) and chemistry–climate model (CCM) simulations. This new volcanic forcing, covering the 1600–present period, uses an aerosol microphysical model to provide a realistic, physically consistent treatment of the stratospheric sulfate aerosols. Twenty-six eruptions were modeled individually using the latest available ice cores aerosol mass estimates and historical data on the latitude and date of eruptions. The evolution of aerosol spatial and size distribution after the sulfur dioxide discharge are hence characterized for each volcanic eruption. Large variations are seen in hemispheric partitioning and size distributions in relation to location/date of eruptions and injected SO2 masses. Results for recent eruptions show reasonable agreement with observations. By providing these new estimates of spatial distributions of shortwave and long-wave radiative perturbations, this volcanic forcing may help to better constrain the climate model responses to volcanic eruptions in the 1600–present period. The final data set consists of 3-D values (with constant longitude) of spectrally resolved extinction coefficients, single scattering albedos and asymmetry factors calculated for different wavelength bands upon request. Surface area densities for heterogeneous chemistry are also provided.

[1]  R. A. Plumb.  A “tropical pipe” model of stratospheric transport , 1996 .

[2]  Larry W. Thomason,et al.  Radiative forcing from the 1991 Mount Pinatubo volcanic eruption , 1998 .

[3]  S. Carn,et al.  Tracking volcanic sulfur dioxide clouds for aviation hazard mitigation , 2009 .

[4]  S. Brönnimann,et al.  Uncertainties in modelling the stratospheric warming following Mt. Pinatubo eruption , 2013 .

[5]  R. Stolarski,et al.  Simulation of stratospheric tracers using an improved empirically based two-dimensional model transport , 1999 .

[6]  R. Neely,et al.  The Persistently Variable “Background” Stratospheric Aerosol Layer and Global Climate Change , 2011, Science.

[7]  J. M. Mitchell,et al.  A Preliminary Evaluation of Atmospheric Pollution as a Cause of the Global Temperature Fluctuation of the Past Century , 1970 .

[8]  M. Joshi,et al.  The climatic effects of the direct injection of water vapour into the stratosphere by large volcanic eruptions , 2009 .

[9]  J. Hansen,et al.  Stratospheric aerosol optical depths, 1850–1990 , 1993 .

[10]  H. Sigurdsson,et al.  The 1982 eruptions of El Chichón Volcano, Mexico: Stratigraphy of pyroclastic deposits , 1984 .

[11]  J. Thouret,et al.  Largest explosive eruption in historical times in the Andes at Huaynaputina volcano, a.d. 1600, southern Peru , 1999 .

[12]  B. Santer,et al.  Effect of climate sensitivity on the Response to Volcanic Forcing , 2005 .

[13]  M. Rutherford,et al.  Sulfur diffusion in rhyolite melts , 1996 .

[14]  M. Thiemens,et al.  Cold decade (AD 1810–1819) caused by Tambora (1815) and another (1809) stratospheric volcanic eruption , 2009 .

[15]  Jesper Heile Christensen,et al.  Influence of various forcings on global climate in historical times using a coupled atmosphere–ocean general circulation model , 2006 .

[16]  Heinrich Widmann,et al.  Climate and carbon-cycle variability over the last millennium , 2010 .

[17]  D. Hofmann,et al.  Stratospheric sulfuric acid fraction and mass estimate for the 1982 volcanic eruption of El Chichon , 1983 .

[18]  Stephen Self,et al.  Magma volume, volatile emissions, and stratospheric aerosols from the 1815 eruption of Tambora , 2004 .

[19]  H. Graf,et al.  Injection of gases into the stratosphere by explosive volcanic eruptions , 2003 .

[20]  M. Reagan,et al.  Gas transport model for the magmatic system at Mount Pinatubo, Philippines: Insights from (210Pb)/(226Ra) , 2009 .

[21]  G. Meehl,et al.  Title A monthly and latitudinally varying volcanic forcing dataset in simulations of 20 th century climate Permalink , 2003 .

[22]  Jonathan M. Gregory,et al.  The impact of natural and anthropogenic forcings on climate and hydrology since 1550 , 2006 .

[23]  B. Santer,et al.  Krakatoa lives: The effect of volcanic eruptions on ocean heat content and thermal expansion , 2006 .

[24]  R. Stothers.  Three centuries of observation of stratospheric transparency , 2007 .

[25]  C. Timmreck,et al.  The influence of eruption season on the global aerosol evolution and radiative impact of tropical volcanic eruptions , 2011 .

[26]  A. Robock,et al.  The Volcanic Signal in Goddard Institute for Space Studies Three-Dimensional Model Simulations. , 1994 .

[27]  D. Weisenstein,et al.  A two‐dimensional model of sulfur species and aerosols , 1997 .

[28]  T. Crowley,et al.  Technical details concerning development of a 1200 yr proxy index for global volcanism , 2012 .

[29]  R. Stothers.  Major optical depth perturbations to the stratosphere from volcanic eruptions: Pyrheliometric period, 1881–1960 , 1996 .

[30]  J. Gregory.  Long‐term effect of volcanic forcing on ocean heat content , 2010 .

[31]  H. Sigurdsson,et al.  Plinian and co-ignimbrite tephra fall from the , 1989 .

[32]  Kwang-Yul Kim,et al.  Detection of volcanic, solar and greenhouse gas signals in paleo‐reconstructions of Northern Hemispheric temperature , 2003 .

[33]  Stephen Self,et al.  Atmospheric and environmental effects of the 1783-1784 Laki eruption: A review and reassessment , 2003 .

[34]  J. Pommereau,et al.  Major influence of tropical volcanic eruptions on the stratospheric aerosol layer during the last decade , 2011 .

[35]  R. Stothers,et al.  Major Optical Depth Perturbations to the Stratosphere from Volcanic Eruptions: Stellar-Extinction Period, 1961-1978 , 2013 .

[36]  Luke D. Oman,et al.  Dispersion of the volcanic sulfate cloud from a Mount Pinatubo–like eruption , 2012 .

[37]  C. Newhall,et al.  Fire and mud: eruptions and lahars of Mount Pinatubo, Philippines , 1998 .

[38]  T. Koyaguchi,et al.  Origin of the giant eruption cloud of Pinatubo, June 15, 1991 , 1993 .

[39]  G. Zielinski.  Stratospheric loading and optical depth estimates of explosive volcanism over the last 2100 years derived from the Greenland Ice Sheet Project 2 ice core , 1995 .

[40]  Caspar M. Ammann,et al.  Climate forcing reconstructions for use in PMIP simulations of the last millennium (v1.0) , 2011 .

[41]  S. Self,et al.  The 1883 eruption of Krakatau , 1981, Nature.

[42]  R. Hoblitt,et al.  A basalt trigger for the 1991 eruptions of Pinatubo volcano? , 1992, Nature.

[43]  Jianping Mao,et al.  Winter warming from large volcanic eruptions , 1992 .

[44]  P. Naveau,et al.  A statistical volcanic forcing scenario generator for climate simulations , 2010 .

[45]  D. Stevenson,et al.  Atmospheric Chemistry and Physics Atmospheric Impact of the 1783–1784 Laki Eruption: Part Ii Climatic Effect of Sulphate Aerosol , 2003 .

[46]  J. Holton,et al.  Stratosphere‐troposphere exchange , 1995 .

[47]  J. Merrill,et al.  Simulating the dispersal of tephra from the 1991 Pinatubo eruption: Implications for the formation of widespread ash layers , 2009 .

[48]  J. McConnell,et al.  A new bipolar ice core record of volcanism from WAIS Divide and NEEM and implications for climate forcing of the last 2000 years , 2013 .

[49]  C. Timmreck.  Modeling the climatic effects of large explosive volcanic eruptions , 2012 .

[50]  D. Weisenstein,et al.  Global 2-D intercomparison of sectional and modal aerosol modules , 2006 .

[51]  G. Mann,et al.  The impact of the 1783-1784 AD Laki eruption on global aerosol formation processes and cloud condensation nuclei , 2010 .

[52]  G. Mie.  Beiträge zur Optik trüber Medien, speziell kolloidaler Metallösungen , 1908 .

[53]  L. Thomason,et al.  A global climatology of stratospheric aerosol surface area density deduced from Stratospheric Aerosol and Gas Experiment II measurements: 1984–1994 , 1997 .

[54]  S. Self,et al.  The October 1902 plinian eruption of Santa Maria volcano, Guatemala , 1983 .

[55]  Lieven Clarisse,et al.  Observations of the eruption of the Sarychev volcano and simulations using the HadGEM2 climate model. , 2010 .

[56]  R. Stouffer,et al.  Volcanic signals in oceans , 2009 .

[57]  kwang-yul kim,et al.  Modeling ocean heat content changes during the last millennium , 2003 .

[58]  Axel Timmermann,et al.  Internal and forced climate variability during the last millennium: a model-data comparison using ensemble simulations , 2005 .

[59]  A. Robock,et al.  Volcanic forcing of climate over the past 1500 years: An improved ice core-based index for climate models , 2006 .

[60]  R. Stothers.  The Great Tambora Eruption in 1815 and Its Aftermath , 1984, Science.

[61]  B. Santer,et al.  Arctic Oscillation response to volcanic eruptions in the IPCC AR4 climate models , 2006 .

[62]  J. Stix,et al.  Magma dynamics and collapse mechanisms during four historic caldera‐forming events , 2008 .

[63]  J. Pongratz,et al.  Climate forcing reconstructions for use in PMIP simulations of the last millennium (v1.0) , 2011 .

[64]  A. King,et al.  Petrology and sulfur and chlorine emissions of the 1963 eruption of Gunung Agung, Bali, Indonesia , 1996 .

[65]  R. Turco,et al.  Self-limiting physical and chemical effects in volcanic eruption clouds , 1989 .

[66]  T. Crowley,et al.  Volcanism and the Little Ice Age , 2008 .

[67]  C. Timmreck,et al.  Limited temperature response to the very large AD 1258 volcanic eruption , 2009 .

[68]  R. Betts,et al.  Changes in Atmospheric Constituents and in Radiative Forcing. Chapter 2 , 2007 .

[69]  A. Robock,et al.  Modeling the distribution of the volcanic aerosol cloud from the 1783–1784 Laki eruption , 2006 .

[70]  G. Hegerl,et al.  Influence of human and natural forcing on European seasonal temperatures , 2011 .

[71]  Larry G. Mastin,et al.  A multidisciplinary effort to assign realistic source parameters to models of volcanic ash-cloud transport and dispersion during eruptions , 2009 .

[72]  J. Sheng,et al.  Modeling the stratospheric warming following the Mt. Pinatubo eruption: uncertainties in aerosol extinctions , 2013 .

[73]  A. Robock,et al.  Atmospheric volcanic loading derived from bipolar ice cores: Accounting for the spatial distribution of volcanic deposition , 2007 .

[74]  N. Zeng,et al.  Seasonally Modulated Tropical Drought Induced by Volcanic Aerosol , 2011 .

[75]  S. Self,et al.  A reappraisal of the 1835 eruption of Cosigüina and its atmospheric impact , 1989 .