Measurements of stratospheric odd nitrogen at Arrival Heights, Antarctica, in 1991
An FTIR spectrometer was installed at Arrival Heights, Antarctica (78 deg S, 167 deg E) in February 1991 to measure the evolution of stratospheric HNO3 during the year. In particular, it was the intention to make the first observations of HNO3 trends during autumn, concurrently with ongoing measurem...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19950004635 2023-05-15T13:42:51+02:00 Measurements of stratospheric odd nitrogen at Arrival Heights, Antarctica, in 1991 Blatherwick, R. D. Murcray, Frank J. Keys, J. Gordon Johnston, Paul V. Unclassified, Unlimited, Publicly available Apr 1, 1994 application/pdf http://hdl.handle.net/2060/19950004635 unknown Document ID: 19950004635 Accession ID: 95N11048 http://hdl.handle.net/2060/19950004635 No Copyright CASI GEOPHYSICS NASA. Goddard Space Flight Center, Ozone in the Troposphere and Stratosphere, Part 2; p 610-612 1994 ftnasantrs 2015-03-15T03:40:15Z An FTIR spectrometer was installed at Arrival Heights, Antarctica (78 deg S, 167 deg E) in February 1991 to measure the evolution of stratospheric HNO3 during the year. In particular, it was the intention to make the first observations of HNO3 trends during autumn, concurrently with ongoing measurements of column NO2 made with a grating spectrometer. The time-series of NO2 in the Antarctic shows a rapid decline in the column amount during autumn, and a slow recovery in spring, as the photochemical conditions move the species to and from higher storage reservoirs. The new nitric acid data show for the first time that during autumn the vertical column increases from approximately 1.9 x 10(exp 16) molecule cm(exp -2) at day 30 to approximately 3.1 x 10(exp 16) molecule cm(exp -2) by day 100. When the sun returns in spring, it is found that the column amount has fallen to about half the value at the end of autumn. Spring amounts are variable, but as found in the data from previous years remain low inside the vortex. The autumn increase is attributed to the heterogeneous conversion of N2O5 to gas-phase HNO3 on background aerosols. Low nitric acid column amounts at the start of spring suggest that the HNO3 has moved from the gas to the condensed phase on polar stratospheric clouds with the advent of low temperatures during the polar night. Other/Unknown Material Antarc* Antarctic Antarctica polar night NASA Technical Reports Server (NTRS) Antarctic The Antarctic Arrival Heights ENVELOPE(166.650,166.650,-77.817,-77.817) |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
GEOPHYSICS |
spellingShingle |
GEOPHYSICS Blatherwick, R. D. Murcray, Frank J. Keys, J. Gordon Johnston, Paul V. Measurements of stratospheric odd nitrogen at Arrival Heights, Antarctica, in 1991 |
topic_facet |
GEOPHYSICS |
description |
An FTIR spectrometer was installed at Arrival Heights, Antarctica (78 deg S, 167 deg E) in February 1991 to measure the evolution of stratospheric HNO3 during the year. In particular, it was the intention to make the first observations of HNO3 trends during autumn, concurrently with ongoing measurements of column NO2 made with a grating spectrometer. The time-series of NO2 in the Antarctic shows a rapid decline in the column amount during autumn, and a slow recovery in spring, as the photochemical conditions move the species to and from higher storage reservoirs. The new nitric acid data show for the first time that during autumn the vertical column increases from approximately 1.9 x 10(exp 16) molecule cm(exp -2) at day 30 to approximately 3.1 x 10(exp 16) molecule cm(exp -2) by day 100. When the sun returns in spring, it is found that the column amount has fallen to about half the value at the end of autumn. Spring amounts are variable, but as found in the data from previous years remain low inside the vortex. The autumn increase is attributed to the heterogeneous conversion of N2O5 to gas-phase HNO3 on background aerosols. Low nitric acid column amounts at the start of spring suggest that the HNO3 has moved from the gas to the condensed phase on polar stratospheric clouds with the advent of low temperatures during the polar night. |
format |
Other/Unknown Material |
author |
Blatherwick, R. D. Murcray, Frank J. Keys, J. Gordon Johnston, Paul V. |
author_facet |
Blatherwick, R. D. Murcray, Frank J. Keys, J. Gordon Johnston, Paul V. |
author_sort |
Blatherwick, R. D. |
title |
Measurements of stratospheric odd nitrogen at Arrival Heights, Antarctica, in 1991 |
title_short |
Measurements of stratospheric odd nitrogen at Arrival Heights, Antarctica, in 1991 |
title_full |
Measurements of stratospheric odd nitrogen at Arrival Heights, Antarctica, in 1991 |
title_fullStr |
Measurements of stratospheric odd nitrogen at Arrival Heights, Antarctica, in 1991 |
title_full_unstemmed |
Measurements of stratospheric odd nitrogen at Arrival Heights, Antarctica, in 1991 |
title_sort |
measurements of stratospheric odd nitrogen at arrival heights, antarctica, in 1991 |
publishDate |
1994 |
url |
http://hdl.handle.net/2060/19950004635 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(166.650,166.650,-77.817,-77.817) |
geographic |
Antarctic The Antarctic Arrival Heights |
geographic_facet |
Antarctic The Antarctic Arrival Heights |
genre |
Antarc* Antarctic Antarctica polar night |
genre_facet |
Antarc* Antarctic Antarctica polar night |
op_source |
CASI |
op_relation |
Document ID: 19950004635 Accession ID: 95N11048 http://hdl.handle.net/2060/19950004635 |
op_rights |
No Copyright |
_version_ |
1766173593677332480 |