Scientific Studies in Association with the Halogen Occultation Experiment
This work examines measurements of ozone, NO, NO2, and HCl made by the Halogen Occultation Experiment (HALOE) to track chemical change in the stratosphere. In addition, HALOE observations of two long-lived species, HF and CH4, are used as tracers to distinguish between change due to transport proces...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19980006273 2023-05-15T14:04:38+02:00 Scientific Studies in Association with the Halogen Occultation Experiment Mickley, Lorretta J. Frederick, John E. Unclassified, Unlimited, Publicly available Jul. 1996 application/pdf http://hdl.handle.net/2060/19980006273 unknown Document ID: 19980006273 http://hdl.handle.net/2060/19980006273 No Copyright CASI Geophysics NASA/CR-96-206651 NAS 1.26:206651 1996 ftnasantrs 2019-07-21T08:06:47Z This work examines measurements of ozone, NO, NO2, and HCl made by the Halogen Occultation Experiment (HALOE) to track chemical change in the stratosphere. In addition, HALOE observations of two long-lived species, HF and CH4, are used as tracers to distinguish between change due to transport processes and change due to chemistry. The first study investigates the response of NO(x), (NO and NO2) and ozone to the presence of large amounts of sulfate aerosol in the stratosphere following the 1991 eruption of Mount Pinatubo. As the Pinatubo aerosol cleared the atmosphere at 17 mb (about 27-28 km), the partitioning of total reactive nitrogen shifted more toward NO(x), and ozone amounts declined. This trend is opposite that observed at lower altitudes. The second study examines the chemical aftermath of severe ozone depletion over Antarctica in spring. When ozone levels drop to a threshold amount (about 1 ppm near 20 km), the partitioning of the total chlorine family shifts rapidly from reactive species to the reservoir molecule HCl. This sudden repartitioning shuts down further ozone loss and may be significant as filaments of air peel off the polar vortex and mix with mid-latitude air. Other/Unknown Material Antarc* Antarctica NASA Technical Reports Server (NTRS) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Geophysics |
spellingShingle |
Geophysics Mickley, Lorretta J. Frederick, John E. Scientific Studies in Association with the Halogen Occultation Experiment |
topic_facet |
Geophysics |
description |
This work examines measurements of ozone, NO, NO2, and HCl made by the Halogen Occultation Experiment (HALOE) to track chemical change in the stratosphere. In addition, HALOE observations of two long-lived species, HF and CH4, are used as tracers to distinguish between change due to transport processes and change due to chemistry. The first study investigates the response of NO(x), (NO and NO2) and ozone to the presence of large amounts of sulfate aerosol in the stratosphere following the 1991 eruption of Mount Pinatubo. As the Pinatubo aerosol cleared the atmosphere at 17 mb (about 27-28 km), the partitioning of total reactive nitrogen shifted more toward NO(x), and ozone amounts declined. This trend is opposite that observed at lower altitudes. The second study examines the chemical aftermath of severe ozone depletion over Antarctica in spring. When ozone levels drop to a threshold amount (about 1 ppm near 20 km), the partitioning of the total chlorine family shifts rapidly from reactive species to the reservoir molecule HCl. This sudden repartitioning shuts down further ozone loss and may be significant as filaments of air peel off the polar vortex and mix with mid-latitude air. |
format |
Other/Unknown Material |
author |
Mickley, Lorretta J. Frederick, John E. |
author_facet |
Mickley, Lorretta J. Frederick, John E. |
author_sort |
Mickley, Lorretta J. |
title |
Scientific Studies in Association with the Halogen Occultation Experiment |
title_short |
Scientific Studies in Association with the Halogen Occultation Experiment |
title_full |
Scientific Studies in Association with the Halogen Occultation Experiment |
title_fullStr |
Scientific Studies in Association with the Halogen Occultation Experiment |
title_full_unstemmed |
Scientific Studies in Association with the Halogen Occultation Experiment |
title_sort |
scientific studies in association with the halogen occultation experiment |
publishDate |
1996 |
url |
http://hdl.handle.net/2060/19980006273 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
CASI |
op_relation |
Document ID: 19980006273 http://hdl.handle.net/2060/19980006273 |
op_rights |
No Copyright |
_version_ |
1766275855560998912 |