@article{fdi:010080988,
  title = {{M}odel physics and chemistry causing intermodel disagreement within the {V}ol{MIP}-{T}ambora {I}nteractive {S}tratospheric {A}erosol ensemble},
  author = {{C}lyne, {M}. and {L}amarque, {J}. {F}. and {M}ills, {M}. {J}. and {K}hodri, {M}yriam and {B}all, {W}. and {B}ekki, {S}. and {D}homse, {S}. {S}. and {L}ebas, {N}. and {M}ann, {G}. and {M}arshall, {L}. and {N}iemeier, {U}. and {P}oulain, {V}. and {R}obock, {A}. and {R}ozanov, {E}. and {S}chmidt, {A}. and {S}tenke, {A}. and {S}ukhodolov, {T}. and {T}immreck, {C}. and {T}oohey, {M}. and {T}ummon, {F}. and {Z}anchettin, {D}. and {Z}hu, {Y}. {Q}. and {T}oon, {O}. {B}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}s part of the {M}odel {I}ntercomparison {P}roject on the climatic response to {V}olcanic forcing ({V}ol{MIP}), several climate modeling centers performed a coordinated pre-study experiment with interactive stratospheric aerosol models simulating the volcanic aerosol cloud from an eruption resembling the 1815 {M}t. {T}ambora eruption ({V}ol{MIP}-{T}ambora {ISA} ensemble). {T}he pre-study provided the ancillary ability to assess intermodel diversity in the radiative forcing for a large stratospheric-injecting equatorial eruption when the volcanic aerosol cloud is simulated interactively. {A}n initial analysis of the {V}ol{MIP}-{T}ambora {ISA} ensemble showed large disparities between models in the stratospheric global mean aerosol optical depth ({AOD}). {I}n this study, we now show that stratospheric global mean {AOD} differences among the participating models are primarily due to differences in aerosol size, which we track here by effective radius. {W}e identify specific physical and chemical processes that are missing in some models and/or parameterized differently between models, which are together causing the differences in effective radius. {I}n particular, our analysis indicates that interactively tracking hydroxyl radical ({OH}) chemistry following a large volcanic injection of sulfur dioxide ({SO}2) is an important factor in allowing for the timescale for sulfate formation to be properly simulated. {I}n addition, depending on the timescale of sulfate formation, there can be a large difference in effective radius and subsequently {AOD} that results from whether the {SO}2 is injected in a single model grid cell near the location of the volcanic eruption, or whether it is injected as a longitudinally averaged band around the {E}arth.},
  keywords = {},
  booktitle = {},
  journal = {{A}tmospheric {C}hemistry and {P}hysics},
  volume = {21},
  numero = {5},
  pages = {3317--3343},
  ISSN = {1680-7316},
  year = {2021},
  DOI = {10.5194/acp-21-3317-2021},
  URL = {https://www.documentation.ird.fr/hor/fdi:010080988},
}