Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

The effect of the Pinatubo cloud on hydrogen chloride and hydrogen fluoride

The effect of the Pinatubo cloud on hydrogen chloride and hydrogen fluoride National Optical Astronomy Observatories, Arizona Tucson, Abstract. Ground-based spectroscopic observations from Kitt Peak in Arizona showed no enhancementof stratospheric or I-IF whenthe plumeof the Pinatubo HCI volcano was overhead. The June15, 1991,eruption MountPinatubo of (lat. 15.1'N) injected large amountsof material into the stratosphere [Global Volcanism Network, 1991].Thisevent has allowedus to test the proposition [Wallaceand Livingston, 1991] that while the major sourceof stratospheric andI-IF is thedecomposition HC1 of chlorine andfluorine compounds whichdiffuse upward fromthe surface, such a major eruptionwould resultin the direct injection substantial of amounts eitheror bothHC1 and of I-IF into the stratosphere. Our measurements stratosphefic of HC1 and HF are Pina•ubo cloud overhead 0 ß I, ,, • J • _.,,, I , , , ,•...[ ,,,, Year I • determined from ground-based spectroscopic observations made at Kitt Peak (lat. 32.0'N) in Arizona with the 1-m Fig. 1. The time variation of the column amount of HCI recently observed over Kitt Peak •, Arizona. The solid Fourier transform spectrometerthe McMath at telescope. Detailsof the method and resultsfor the interval 1978 to circles represent morning and afternoondeterminations. Those successive areconnected solid on days by lines. cannot determine theseare annualeventsbut they could if be associated a patternof seasonal with variability. More intensive observations would be requiredto establish this possibility. 1990are givenby WallaceandLivingston [1991]. The most recent results are shown for HCI in Figure 1. The cm uncertainty single in a determination TM mo!. is-lx10 HC! -2 Our visual observations showedthat the Pinatubo cloud was overhead at its brightest a twilight and as glowon the morning July 26. The opticaleffectswere similarto of those previously observed oneof us (W. L.) for the E1 by Acknowledgment. The National Optical Astronomy Observatoriesare operated by the Association of Universities Research Astronomy, for in Inc. (AURA) under cooperative agreement with Foundation. Chichon cloud[Livingston Lockwood, and 1983].Thisdate is consistent with the SAGE I! measurements of the Nationa! Science McCormick Veiga[ 1992]. and TheHCI results show enhancement onJuly26. no at all rough estimate of the upper limit of the volcanic http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geophysical Research Letters Wiley

The effect of the Pinatubo cloud on hydrogen chloride and hydrogen fluoride

Wallace, L.; Livingston, W.
Geophysical Research Letters , Volume 19 (12) – Jun 19, 1992
Download PDF
1 page

Loading next page...
 
/lp/wiley/the-effect-of-the-pinatubo-cloud-on-hydrogen-chloride-and-hydrogen-EvP0sWJULK

References (5)

Publisher
Wiley
Copyright
Copyright © 1992 by the American Geophysical Union.
ISSN
0094-8276
eISSN
1944-8007
DOI
10.1029/92GL01112
Publisher site
See Article on Publisher Site

Abstract

National Optical Astronomy Observatories, Arizona Tucson, Abstract. Ground-based spectroscopic observations from Kitt Peak in Arizona showed no enhancementof stratospheric or I-IF whenthe plumeof the Pinatubo HCI volcano was overhead. The June15, 1991,eruption MountPinatubo of (lat. 15.1'N) injected large amountsof material into the stratosphere [Global Volcanism Network, 1991].Thisevent has allowedus to test the proposition [Wallaceand Livingston, 1991] that while the major sourceof stratospheric andI-IF is thedecomposition HC1 of chlorine andfluorine compounds whichdiffuse upward fromthe surface, such a major eruptionwould resultin the direct injection substantial of amounts eitheror bothHC1 and of I-IF into the stratosphere. Our measurements stratosphefic of HC1 and HF are Pina•ubo cloud overhead 0 ß I, ,, • J • _.,,, I , , , ,•...[ ,,,, Year I • determined from ground-based spectroscopic observations made at Kitt Peak (lat. 32.0'N) in Arizona with the 1-m Fig. 1. The time variation of the column amount of HCI recently observed over Kitt Peak •, Arizona. The solid Fourier transform spectrometerthe McMath at telescope. Detailsof the method and resultsfor the interval 1978 to circles represent morning and afternoondeterminations. Those successive areconnected solid on days by lines. cannot determine theseare annualeventsbut they could if be associated a patternof seasonal with variability. More intensive observations would be requiredto establish this possibility. 1990are givenby WallaceandLivingston [1991]. The most recent results are shown for HCI in Figure 1. The cm uncertainty single in a determination TM mo!. is-lx10 HC! -2 Our visual observations showedthat the Pinatubo cloud was overhead at its brightest a twilight and as glowon the morning July 26. The opticaleffectswere similarto of those previously observed oneof us (W. L.) for the E1 by Acknowledgment. The National Optical Astronomy Observatoriesare operated by the Association of Universities Research Astronomy, for in Inc. (AURA) under cooperative agreement with Foundation. Chichon cloud[Livingston Lockwood, and 1983].Thisdate is consistent with the SAGE I! measurements of the Nationa! Science McCormick Veiga[ 1992]. and TheHCI results show enhancement onJuly26. no at all rough estimate of the upper limit of the volcanic

Journal

Geophysical Research Letters – Wiley

Published: Jun 19, 1992

There are no references for this article.