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Title: Relationship between total ozone amounts and stratospheric temperature at Syowa, Antarctica

Abstract

Using statistical methods, the relationship has been studied between total ozone and 100-mbar temperatures at Syowa Station, Antarctica (69[degrees]S, 40[degrees]E), based on data obtained in 1961-1981 and 1982-1988, the time of ozone depletion in Antarctica. Results indicate a strong, positive correlation between total ozone and 100-mbar stratospheric temperatures during September-March for all years, but lower ozone values at 100-mbar stratospheric temperatures colder than about [minus]60[degrees]C during the 1982-1988 period. Ozone destruction by heterogeneous photochemical processes is the main cause of ozone depletion over Syowa during the 1980's, with a lesser contribution from a change in air dynamics (heat, ozone, and momentum transport to Antarctica during the austral spring) that increased polar vortex stability, thereby promoting photochemical ozone depression within the vortex. 27 refs., 9 figs., 2 tabs.

Authors:
 [1]
  1. (Meteorological Research Inst., Ibaraki (Japan))
Publication Date:
OSTI Identifier:
7064957
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Geophysical Research; (United States); Journal Volume: 98:D2
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; OZONE; COMPARATIVE EVALUATIONS; ECOLOGICAL CONCENTRATION; STRATOSPHERE; AMBIENT TEMPERATURE; AIR; ANTARCTICA; DYNAMICS; EARTH ATMOSPHERE; ECOSYSTEMS; HEAT; SOLAR RADIATION; STABILITY; TRANSPORT; ULTRAVIOLET RADIATION; ANTARCTIC REGIONS; ELECTROMAGNETIC RADIATION; ENERGY; EVALUATION; FLUIDS; GASES; MECHANICS; POLAR REGIONS; RADIATIONS; STELLAR RADIATION 540120* -- Environment, Atmospheric-- Chemicals Monitoring & Transport-- (1990-)

Citation Formats

Shigeru Chubachi. Relationship between total ozone amounts and stratospheric temperature at Syowa, Antarctica. United States: N. p., 1993. Web. doi:10.1029/92JD02224.
Shigeru Chubachi. Relationship between total ozone amounts and stratospheric temperature at Syowa, Antarctica. United States. doi:10.1029/92JD02224.
Shigeru Chubachi. 1993. "Relationship between total ozone amounts and stratospheric temperature at Syowa, Antarctica". United States. doi:10.1029/92JD02224.
@article{osti_7064957,
title = {Relationship between total ozone amounts and stratospheric temperature at Syowa, Antarctica},
author = {Shigeru Chubachi},
abstractNote = {Using statistical methods, the relationship has been studied between total ozone and 100-mbar temperatures at Syowa Station, Antarctica (69[degrees]S, 40[degrees]E), based on data obtained in 1961-1981 and 1982-1988, the time of ozone depletion in Antarctica. Results indicate a strong, positive correlation between total ozone and 100-mbar stratospheric temperatures during September-March for all years, but lower ozone values at 100-mbar stratospheric temperatures colder than about [minus]60[degrees]C during the 1982-1988 period. Ozone destruction by heterogeneous photochemical processes is the main cause of ozone depletion over Syowa during the 1980's, with a lesser contribution from a change in air dynamics (heat, ozone, and momentum transport to Antarctica during the austral spring) that increased polar vortex stability, thereby promoting photochemical ozone depression within the vortex. 27 refs., 9 figs., 2 tabs.},
doi = {10.1029/92JD02224},
journal = {Journal of Geophysical Research; (United States)},
number = ,
volume = 98:D2,
place = {United States},
year = 1993,
month = 2
}
  • The column amounts of NO2 have been measured using visible spectroscopy at Syowa Station, Antarctica (69 deg S), from March 1990. The NO2 slant column amount at a solar zenith angle of 90 deg exhibits a large seasonal variation reaching the minimum value of 1 x 10(exp 16)/sq cm or less in midwinter, and it increases to the maximum value of 17 x 10(exp 16)/sq cm in midsummer. The recovery of NO2 in spring is 2-3 times slower than the fall decay. The observed temperature indicates that polar stratospheric clouds (PSCs) are expected to form from midwinter to early spring.more » A decrease in ozone was observed from early August and continued to the end of September, which is consistent with the observed depletion in NO2 during the same period. A chemical box model has been used to interpret quantitatively these observed results. The observed NO2 values in fall are in agreement with the box model including only gas phase chemistry or with heterogeneous chemistry on background sulfuric acid aerosols. In addition, the very low NO2 amounts and slow rate of increase observed from midwinter to early spring agree well with the model results assuming heterogeneous chemistry on PSCs. From the late spring of 1991 the NO2 amounts are lower by more than 30%, presumably due to the increased rate of conversion of NO(x) into HNO3 via N2O5 on the enhanced amount of sulfuric acid aerosols resulting from the Pinatubo eruption.« less
  • The authors interpret column measurements of NO{sub 2} made from Syowa Station, Antarctica since March, 1990. It is lowest in midwinter, and peaks in midsummer. The fall rate of decrease is considerably greater than the spring increase rate. Temperature trends indicate that late winter polar stratospheric clouds could form, providing an explanation for low NO{sub 2} abundances. They have used a box model to simulate the observed density variations. Increasing amounts of aerosols from the eruption of Pinatubo probably account for lower NO{sub 2} densities in late spring of 1991. Effects due to the atmospheric aerosol loading are seen tomore » extend into 1992, and also during 1992 the vortex boundary was located differently with respect to the observation station.« less
  • This paper discusses observations made during a situation in January, when there was an unusual ozone behaviour. At the edge of the polar vortex, there was a region of the middle stratosphere with quite cold temperatures, which was located over a warm anticyclonic block in the troposphere. The intervening tropopause layer was quite low in temperature also. In this situation there was a strong positive correlation between ozone partial pressures and ambient temperatures. This situation favors vertical mixing which can drive a decrease in ozone concentration, but it also favors the conditions which support chemical processes involving nitric acid trihydratemore » aerosols which can mediate ozone destruction reactions. Similar climatic situations have been observed in TOMS data in eleven cases over fourteen years.« less
  • Satellite measurements reveal the distribution of ozone column abundance to be complex and highly dynamic, with fluctuations as large as 100% common in both hemispheres. Observations of total ozone from Numbus 7 total ozone mapping spectrometer (TOMS) together with contemporaneous analyses of the circulation are used to investigate the origin of these fluctuations. A large component of total ozone variability is explained by quasi-columnar motion of air along isentropic surfaces in the lower stratosphere. The vertical component of such motion introduces anomalous column abundance through compression and expansion, which alters the ozone number density of individual bodies of air. Thismore » process leads to a high correlation between the total ozone and the elevation of isentropic surfaces in the lower stratosphere. The horizontal component of column-averaged motion introduces anomalous total ozone by rearanging the distribution of column-averaged ozone mixing ratio, which can be derived from TOMS measurements and contemporaneous isentropic analyses. Quasi-conserved, column-averaged ozone mixing ratio is well correlated with equivalent barotropic potential vorticity, which is a tracer of column-averaged motion. In fact, anomalies of column-averaged mixing ratio created during major warmings can be tracked intact and coincident with companion anomalies in the circulation for as long as 3 weeks. Because it follows from observations of tracer behavior, column-averaged ozone mixing ratio may provide a more detailed picture of air motions in the lower stratosphere than is possible from potential vorticity, which must be derived largely from temperature observations. Together with contemporaneous cloud imagery, TOMS observations also reveal interactions with tropospheric convection, which result in a loss and, ultimately, the destruction of stratospheric ozone. 17 refs., 1 fig.« less
  • This paper summarized in-situ measurements of HNO[sub 3] and O[sub 3] made using a Michelson Interferometer for Passive Atmospheric Sounding - Flugzeug Transall (MIPAS-FT), which measures IR radiation emitted by trace constituents in the atmosphere. The authors report here measurements made during EASOE, from an aircraft platform, which span the region from 45[degrees]W to 45[degrees]E, and from 55[degrees] to 80[degrees]N. Though there are considerable variations observed in the column densities, there is a strong correlation between these two gases.