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Title: Volcanic aerosol and ozone depletion within the Antarctic polar vortex during the austral spring of 1991

Abstract

In the spring of 1991 the Antarctic lower stratosphere was characterized by a layer of volcanic aerosol from the Cerro Hudson eruption. This aerosol layer was observed from McMurdo Station, Antarctica, with both lidar and balloonborne particle counters beginning around 10 September. After 20 September the aerosol was observed daily between 9 and 13 km. In this layer homogeneous nucleation of new aerosol was observed with concentrations greater than 6000/cu cm. Comparisons of scattering ratio calculated from measured particle size distributions agree best with the lidar measurements when a real index of refraction near 1.5 is used. In the past 5 years of measurements, ozone below 13 km has been relatively unchanged during the annual Antartic ozone depletion; however, in 1991 ozone below 13 km decreased at a rate of 4 - 8 ppb/day over 30 days. This change began shortly after the appearance of the volcanic aerosol, providing direct measurements correlating volcanic aerosol and ozone depletion. 16 refs.

Authors:
; ; ; ; ;  [1]
  1. Wyoming Univ., Laramie (United States) CNR, Ist. de Fisica dell'Atmosfera, Frascati (Italy) NOAA, Climate Monitoring and Diagnostics Lab., Boulder, CO (United States) ENEA, Centro Ricerche Energia Casaccia, Rome (Italy)
Publication Date:
OSTI Identifier:
6999623
Resource Type:
Journal Article
Journal Name:
Geophysical Research Letters (American Geophysical Union); (United States)
Additional Journal Information:
Journal Volume: 19:18; Journal ID: ISSN 0094-8276
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; OZONE; ECOLOGICAL CONCENTRATION; VOLCANIC GASES; ENVIRONMENTAL EFFECTS; AEROSOLS; ANTARCTIC REGIONS; DISTRIBUTION; NUCLEATION; STRATOSPHERE; VOLCANOES; COLLOIDS; DISPERSIONS; EARTH ATMOSPHERE; FLUIDS; GASES; POLAR REGIONS; SOLS; 540110*

Citation Formats

Deshler, T, Adriani, A, Gobbi, G P, Hofmann, D J, Donfrancesco, G di, and Johnson, B J. Volcanic aerosol and ozone depletion within the Antarctic polar vortex during the austral spring of 1991. United States: N. p., 1992. Web. doi:10.1029/92GL01943.
Deshler, T, Adriani, A, Gobbi, G P, Hofmann, D J, Donfrancesco, G di, & Johnson, B J. Volcanic aerosol and ozone depletion within the Antarctic polar vortex during the austral spring of 1991. United States. https://doi.org/10.1029/92GL01943
Deshler, T, Adriani, A, Gobbi, G P, Hofmann, D J, Donfrancesco, G di, and Johnson, B J. 1992. "Volcanic aerosol and ozone depletion within the Antarctic polar vortex during the austral spring of 1991". United States. https://doi.org/10.1029/92GL01943.
@article{osti_6999623,
title = {Volcanic aerosol and ozone depletion within the Antarctic polar vortex during the austral spring of 1991},
author = {Deshler, T and Adriani, A and Gobbi, G P and Hofmann, D J and Donfrancesco, G di and Johnson, B J},
abstractNote = {In the spring of 1991 the Antarctic lower stratosphere was characterized by a layer of volcanic aerosol from the Cerro Hudson eruption. This aerosol layer was observed from McMurdo Station, Antarctica, with both lidar and balloonborne particle counters beginning around 10 September. After 20 September the aerosol was observed daily between 9 and 13 km. In this layer homogeneous nucleation of new aerosol was observed with concentrations greater than 6000/cu cm. Comparisons of scattering ratio calculated from measured particle size distributions agree best with the lidar measurements when a real index of refraction near 1.5 is used. In the past 5 years of measurements, ozone below 13 km has been relatively unchanged during the annual Antartic ozone depletion; however, in 1991 ozone below 13 km decreased at a rate of 4 - 8 ppb/day over 30 days. This change began shortly after the appearance of the volcanic aerosol, providing direct measurements correlating volcanic aerosol and ozone depletion. 16 refs.},
doi = {10.1029/92GL01943},
url = {https://www.osti.gov/biblio/6999623}, journal = {Geophysical Research Letters (American Geophysical Union); (United States)},
issn = {0094-8276},
number = ,
volume = 19:18,
place = {United States},
year = {Tue Sep 01 00:00:00 EDT 1992},
month = {Tue Sep 01 00:00:00 EDT 1992}
}