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


Autoria(s): Arfeuille, Florian Xavier; Weisenstein, D.; Mack, H.; Rozanov, E.; Peter, T.; Brönnimann, Stefan
Data(s)

2014

Resumo

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.

Formato

application/pdf

Identificador

http://boris.unibe.ch/52367/1/cp-10-359-2014.pdf

Arfeuille, Florian Xavier; Weisenstein, D.; Mack, H.; Rozanov, E.; Peter, T.; Brönnimann, Stefan (2014). Volcanic forcing for climate modeling: a new microphysics-based data set covering years 1600–present. Climate of the past, 10(1), pp. 359-375. Copernicus Publications 10.5194/cp-10-359-2014 <http://dx.doi.org/10.5194/cp-10-359-2014>

doi:10.7892/boris.52367

info:doi:10.5194/cp-10-359-2014

urn:issn:1814-9324

Idioma(s)

eng

Publicador

Copernicus Publications

Relação

http://boris.unibe.ch/52367/

Direitos

info:eu-repo/semantics/openAccess

Fonte

Arfeuille, Florian Xavier; Weisenstein, D.; Mack, H.; Rozanov, E.; Peter, T.; Brönnimann, Stefan (2014). Volcanic forcing for climate modeling: a new microphysics-based data set covering years 1600–present. Climate of the past, 10(1), pp. 359-375. Copernicus Publications 10.5194/cp-10-359-2014 <http://dx.doi.org/10.5194/cp-10-359-2014>

Palavras-Chave #910 Geography & travel
Tipo

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion

PeerReviewed