Reconstruction of Ozone Profile and Column at Andøya in the Winter 1997/98
0
Citation
0
Reference
20
Related Paper
Cite
Tropospheric ozone
Microwave Limb Sounder
Concentration cell
Cite
Citations (13)
Tropopause
Mixing ratio
Tropospheric ozone
Cite
Citations (4)
L625 UV-DIAL lidar acquired lots of stratospheric ozone data during 1998～2001.Through analysis of these data,some characteristics of stratospheric ozone profiles over Hefei were given.The altitude of peak density of average ozone profile is 23.32 km,and the averaged ozone peak density is 4.43×10~(12)cm~(-3).The column abundance is 6.4×10~(18)cm~(-2).The variation of ozone density is of an obvious one year cyclic vibration, shown as the seasonal variation.The ozone density in middle and upper stratosphere is larger in summer than in winter.In lower stratosphere,ozone density is larger in winter than in summer.The average altitude of peak ozone density is lower in winter than in summer.
Seasonality
Cite
Citations (0)
SCIAMACHY
Ozone Monitoring Instrument
Cite
Citations (9)
Ground based millimeter‐wave measurements of Arctic stratospheric ozone in the winter 1996/97 are presented. The measurements have been performed at one of the primary Arctic stations of the Network for the Detection of Stratospheric Change (NDSC) in Ny‐Ålesund, Spitsbergen (78.9°N, 11.9°E). Over the period 11 February to 26 April the measurements show an ozone mixing ratio decrease of 1.3 ppm in the lower stratosphere. Correspondingly, stratospheric ozone column densities decreased by more than 50 DU. Taking into account the transport of ozone due to diabatic decent, we estimated chemical ozone loss rates of 22 ppb/day in February decreasing to 15 ppb/day in late April 1997.
Ozone Depletion
Diabatic
Cite
Citations (28)
A three‐dimensional chemical‐transport model of the stratosphere has been used to study the 1996 austral winter and spring. Both the model and ozonesonde measurements show that ozone depletion associated with the Antarctic ozone hole follows the edge of polar night: very little ozone‐depleted air mixes ahead of the terminator as it sweeps poleward, until the terminator reaches 80°S. Other details of the model ozone field show very good agreement with measurements.
Ozone Depletion
Terminator (solar)
Polar night
Cite
Citations (26)
Abstract Data from the HIgh Resolution Dynamics Limb Sounder (HIRDLS), the Microwave Limb Sounder (MLS), and the Whole Atmosphere Community Climate Model (WACCM) are used to investigate the annual variation of total column ozone in high northern latitudes. Downward transport of ozone‐rich air by the residual mean circulation during autumn and winter bends ozone isopleths down and increases the high‐latitude ozone amounts, leading to an ozone maximum at the end of the winter. During the summer months eddy mixing acts to restore pre‐fall distributions of ozone. In this study the large‐scale mixing in the lower stratosphere is analyzed using Nakamura's (1996) equivalent length formulation with observed and simulated ozone. The analysis of ozone mixing is performed in the tracer equivalent latitude‐potential temperature coordinate system. Steep latitudinal gradients of ozone isopleths below about 500 K occur during the winter, where there are minima in the equivalent length, indicating barriers to mixing at 30°N–40°N. This transport barrier allows large ozone maxima to develop poleward of it. The barrier disappears over the summer, permitting latitudinal mixing of the high ozone air. Above 500 K mixing is more effective during the winter, so a large winter maximum does not occur. In both midlatitude and high latitude the lower stratospheric layer from 330 to 500 K doubles its ozone content from autumn to spring, compared with much smaller changes in the layer from 500 to 650 K. Our results confirm that the presence of the winter transport barrier in the lower stratosphere controls the seasonal variation of total ozone.
Middle latitudes
Mixing ratio
Microwave Limb Sounder
Cite
Citations (7)
The severe Arctic ozone reduction in the winter 2004/2005 is analyzed using ACE‐FTS observations and four different analysis techniques: correlations between ozone and long‐lived tracers (adjusted to account for mixing), an artificial tracer correlation method, a profile‐descent technique, and the empirical relationship between ozone loss and potential PSC volume. The average maximum ozone loss was about 2.1 ppmv at 475 K–500 K (∼18 km–20 km). Over 60% of the ozone between 425 K–475 K (∼16 km–18 km) was destroyed. The average total column ozone loss was 119 DU, ∼20–30 DU larger than the largest previously observed Arctic ozone loss in the winter 1999/2000.
Ozone Depletion
Cite
Citations (63)
Ozone Depletion
Cite
Citations (0)
Anomaly (physics)
Ozone Depletion
Middle latitudes
Cite
Citations (11)