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Methodology to obtain highly resolved SO2 vertical profiles for representation of volcanic emissions in climate models

Sandvik, Oscar S. LU orcid ; Friberg, Johan LU ; Sporre, Moa K. LU orcid and Martinsson, Bengt G. LU (2021) In Atmospheric Measurement Techniques 14(11). p.7153-7165
Abstract

In this study we describe a methodology to create high-vertical-resolution SO2 profiles from volcanic emissions. We demonstrate the method's performance for the volcanic clouds following the eruption of Sarychev in June 2009. The resulting profiles are based on a combination of satellite SO2 and aerosol retrievals together with trajectory modelling. We use satellite-based measurements, namely lidar backscattering profiles from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) satellite instrument, to create vertical profiles for SO2 swaths from the Atmospheric Infrared Sounder (AIRS) aboard the Aqua satellite. Vertical profiles are created by transporting the air containing volcanic aerosol seen in CALIOP observations using... (More)

In this study we describe a methodology to create high-vertical-resolution SO2 profiles from volcanic emissions. We demonstrate the method's performance for the volcanic clouds following the eruption of Sarychev in June 2009. The resulting profiles are based on a combination of satellite SO2 and aerosol retrievals together with trajectory modelling. We use satellite-based measurements, namely lidar backscattering profiles from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) satellite instrument, to create vertical profiles for SO2 swaths from the Atmospheric Infrared Sounder (AIRS) aboard the Aqua satellite. Vertical profiles are created by transporting the air containing volcanic aerosol seen in CALIOP observations using the FLEXible PARTicle dispersion model (FLEXPART) while preserving the high vertical resolution using the potential temperatures from the MERRA-2 (Modern-Era Retrospective analysis for Research and Application) meteorological data for the original CALIOP swaths. For the Sarychev eruption, air tracers from 75 CALIOP swaths within 9g d after the eruption are transported forwards and backwards and then combined at a point in time when AIRS swaths cover the complete volcanic SO2 cloud. Our method creates vertical distributions for column density observations of SO2 for individual AIRS swaths, using height information from multiple CALIOP swaths. The resulting dataset gives insight into the height distribution in the different sub-clouds of SO2 within the stratosphere. We have compiled a gridded high-vertical-resolution SO2 inventory that can be used in Earth system models, with a vertical resolution of 1g K in potential temperature, 61g g 56g m, or 1.8g g 2.9g mbar.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Atmospheric Measurement Techniques
volume
14
issue
11
pages
13 pages
publisher
Copernicus GmbH
external identifiers
  • scopus:85119579820
ISSN
1867-1381
DOI
10.5194/amt-14-7153-2021
language
English
LU publication?
yes
additional info
Publisher Copyright: © Copyright:
id
a8a2d07b-4058-47cf-a542-e2b6afd2acbd
date added to LUP
2021-12-08 21:54:59
date last changed
2022-04-27 06:33:12
@article{a8a2d07b-4058-47cf-a542-e2b6afd2acbd,
  abstract     = {{<p>In this study we describe a methodology to create high-vertical-resolution SO2 profiles from volcanic emissions. We demonstrate the method's performance for the volcanic clouds following the eruption of Sarychev in June 2009. The resulting profiles are based on a combination of satellite SO2 and aerosol retrievals together with trajectory modelling. We use satellite-based measurements, namely lidar backscattering profiles from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) satellite instrument, to create vertical profiles for SO2 swaths from the Atmospheric Infrared Sounder (AIRS) aboard the Aqua satellite. Vertical profiles are created by transporting the air containing volcanic aerosol seen in CALIOP observations using the FLEXible PARTicle dispersion model (FLEXPART) while preserving the high vertical resolution using the potential temperatures from the MERRA-2 (Modern-Era Retrospective analysis for Research and Application) meteorological data for the original CALIOP swaths. For the Sarychev eruption, air tracers from 75 CALIOP swaths within 9g d after the eruption are transported forwards and backwards and then combined at a point in time when AIRS swaths cover the complete volcanic SO2 cloud. Our method creates vertical distributions for column density observations of SO2 for individual AIRS swaths, using height information from multiple CALIOP swaths. The resulting dataset gives insight into the height distribution in the different sub-clouds of SO2 within the stratosphere. We have compiled a gridded high-vertical-resolution SO2 inventory that can be used in Earth system models, with a vertical resolution of 1g K in potential temperature, 61g g 56g m, or 1.8g g 2.9g mbar.</p>}},
  author       = {{Sandvik, Oscar S. and Friberg, Johan and Sporre, Moa K. and Martinsson, Bengt G.}},
  issn         = {{1867-1381}},
  language     = {{eng}},
  month        = {{11}},
  number       = {{11}},
  pages        = {{7153--7165}},
  publisher    = {{Copernicus GmbH}},
  series       = {{Atmospheric Measurement Techniques}},
  title        = {{Methodology to obtain highly resolved SO2 vertical profiles for representation of volcanic emissions in climate models}},
  url          = {{http://dx.doi.org/10.5194/amt-14-7153-2021}},
  doi          = {{10.5194/amt-14-7153-2021}},
  volume       = {{14}},
  year         = {{2021}},
}