Vertical profile of stratospheric ozone by lidar sounding from the ground

Nature ◽  
1977 ◽  
Vol 270 (5635) ◽  
pp. 329-331 ◽  
Author(s):  
G. MÉGIE ◽  
J. Y. ALLAIN ◽  
M. L. CHANIN ◽  
J. E. BLAMONT
Keyword(s):  
Vertical Profile ◽  
Stratospheric Ozone ◽  
Lidar Sounding

scholarly journals Solar cycle variations of stratospheric ozone and temperature in simulations of a coupled chemistry-climate model

2007 ◽  
Vol 7 (6) ◽  
pp. 1693-1706 ◽  
Author(s):  
J. Austin ◽  
L. L. Hood ◽  
B. E. Soukharev
Keyword(s):  
Solar Cycle ◽  
Vertical Profile ◽  
Climate Model ◽  
Solar Rotation ◽  
Stratospheric Ozone ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Surface Temperatures ◽  
Solar Phase

Abstract. The results from three 45-year simulations of a coupled chemistry climate model are analysed for solar cycle influences on ozone and temperature. The simulations include UV forcing at the top of the atmosphere, which includes a generic 27-day solar rotation effect as well as the observed monthly values of the solar fluxes. The results are analysed for the 27-day and 11-year cycles in temperature and ozone. In accordance with previous results, the 27-day cycle results are in good qualitative agreement with observations, particularly for ozone. However, the results show significant variations, typically a factor of two or more in sensitivity to solar flux, depending on the solar cycle. In the lower and middle stratosphere we show good agreement also between the modelled and observed 11-year cycle results for the ozone vertical profile averaged over low latitudes. In particular, the minimum in solar response near 20 hPa is well simulated. In comparison, experiments of the model with fixed solar phase (solar maximum/solar mean) and climatological sea surface temperatures lead to a poorer simulation of the solar response in the ozone vertical profile, indicating the need for variable phase simulations in solar sensitivity experiments. The role of sea surface temperatures and tropical upwelling in simulating the ozone minimum response are also discussed.

scholarly journals Solar cycle variations of stratospheric ozone and temperature in simulations of a coupled chemistry-climate model

2006 ◽  
Vol 6 (6) ◽  
pp. 12121-12153 ◽  
Author(s):  
J. Austin ◽  
L. L. Hood ◽  
B. E. Soukharev
Keyword(s):  
Solar Cycle ◽  
Vertical Profile ◽  
Climate Model ◽  
Solar Rotation ◽  
Stratospheric Ozone ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Surface Temperatures ◽  
Solar Phase ◽  
First Time

Abstract. The results from three 45-year simulations of a coupled chemistry climate model are analysed for solar cycle influences on ozone and temperature. The simulations include UV forcing at the top of the atmosphere, which includes a generic 27-day solar rotation effect as well as the observed monthly values of the solar fluxes. The results are analysed for the 27-day and 11-year cycles in temperature and ozone. In accordance with previous results, the 27-day cycle results are in good qualitative agreement with observations, particularly for ozone. However, the results show significant variations, typically a factor of two or more in sensitivity to solar flux, depending on the solar cycle. We show for the first time good agreement also between the observed 11-year cycle and model results for the ozone vertical profile, which both indicate a minimum in solar response near 20 hPa. In comparison, simulations of the model with fixed solar phase (solar maximum/solar mean) and climatological sea surface temperatures lead to a poor simulation of the solar response in the ozone vertical profile. The results indicate the need for variable phase simulations in solar sensitivity experiments and the role of sea surface temperatures is discussed.

Neutrophil Myeloperoxidase Destruction by Ultraviolet Irradiation

1988 ◽  
Vol 46 ◽  
pp. 138-139
Author(s):  
J. Hanker ◽  
B. Giammara ◽  
G. Strauss
Keyword(s):  
Uv Radiation ◽  
Myeloid Leukemia ◽  
Stratospheric Ozone ◽  
Psoriasis Patient ◽  
Whole Body ◽  
Human Neutrophils ◽  
Cupric Nitrate ◽  
The Earth ◽  
Routine Handling ◽  
Uvb Phototherapy

Only a fraction of the UV radiation emitted by the sun reaches the earth; most of the UVB (290-320nm) is eliminated by stratospheric ozone. There is increasing concern, however, that man-made chemicals are damaging this ozone layer. Although the effects of UV on DNA or as a carcinogen are widely known, preleukemia and acute myeloid leukemia (AML) have only rarely been reported in psoriasis patients treated with 8-methoxypsoralen and UV (PUVA). It was therefore of interest to study the effects of UV on the myeloperoxidase (MP) activity of human neutrophils. The peroxidase activity of enriched leukocyte preparations on coverslips was shown cytochemically with a diaminobenzidine medium and cupric nitrate intensification.Control samples (Figs. 1,4,5) of human bloods that were not specifically exposed to UV radiation or light except during routine handling were compared with samples which had been exposed in one of several different ways. One preparation (Fig. 2) was from a psoriasis patient who had received whole-body UVB phototherapy repeatedly.

Sign in / Sign up

Export Citation Format

Share Document