An assessment of the world ground‐based total ozone network performance from the comparison with satellite data

Fioletov, Vitali; Kerr, J. B.; Hare, E. W.; Labow, G. J.; McPeters, Richard D.

doi:10.1029/1998jd100046

Cited by 81 publications

(85 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In practice, this will depend upon the state of polynomials and whether or not the instrument or the polynomials suffer from an air mass dependence. The long-term total precision for annual means is ±0.5% (Fioletov et al, 1999).…”

Section: Total Ozone Measurements and Preliminary Analysismentioning

confidence: 99%

Total ozone and surface UV trends in the United Kingdom: 1979–2008

Smedley

Rimmer

Moore

et al. 2011

Intl Journal of Climatology

View full text Add to dashboard Cite

ABSTRACT:In this study we present the UK's total ozone and UV data records, their measurement and preliminary processing, and discuss the observed trends. Notably, we combine the records from the Camborne and Reading sites to obtain a single ozone data series for southern England -a total duration of 30 years.Two-section linear trends and cross-over years are determined for Lerwick and southern England, both annually and seasonally. The observed minimum using this technique in the UK ozone record is found to occur during the year 1993. Significant trends of −4.8% per decade for southern England and −5.8% per decade for Lerwick are seen prior to the mid-1990s; the rate of decrease in the UK being at the upper limit of other European stations. No significant ozone trend is seen for the latter period in either location in contrast with Europe as a whole. We, additionally, compare the satellite-derived total ozone trends for both locations.The UV record at Reading showed a significant trend from 1993 to 2008 in the daily maximum UV index record (6.6% per decade), despite no significant recovery in the total ozone data series, suggesting a reduction in cloud cover during the midday period. Filtering data to remove other factors shows the erythemal UV to have an ozone-dependent trend of −0.11% per year, but this is not statistically significant. We find no correlation between anomalies in the surface UV and total ozone records suggesting that the majority of the inter-annual variability is due to changes in cloud cover and other effects.

show abstract

Section: Total Ozone Measurements and Preliminary Analysismentioning

confidence: 99%

Total ozone and surface UV trends in the United Kingdom: 1979–2008

Smedley

Rimmer

Moore

et al. 2011

Intl Journal of Climatology

View full text Add to dashboard Cite

show abstract

“…Data quality has been checked, including the identification of observations with errors in the background currents that can lead to spurious values. Total ozone observations generally employed the Dobson UV absorption approach (2,8), and where information on the light source was available, we included only those data taken by using the direct sun, blue sky, or thin cloud. Data from Yakutsk employed the filter ozonometer method, whereas the recent data from some stations employed the Brewer method (see refs.…”

Section: Methodsmentioning

confidence: 99%

Contrasts between Antarctic and Arctic ozone depletion

Solomon

Portmann

Thompson

2007

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

This work surveys the depth and character of ozone depletion in the Antarctic and Arctic using available long balloon-borne and ground-based records that cover multiple decades from groundbased sites. Such data reveal changes in the range of ozone values including the extremes observed as polar air passes over the stations. Antarctic ozone observations reveal widespread and massive local depletion in the heart of the ozone ''hole'' region near 18 km, frequently exceeding 90%. Although some ozone losses are apparent in the Arctic during particular years, the depth of the ozone losses in the Arctic are considerably smaller, and their occurrence is far less frequent. Many Antarctic total integrated column ozone observations in spring since approximately the 1980s show values considerably below those ever observed in earlier decades. For the Arctic, there is evidence of some spring season depletion of total ozone at particular stations, but the changes are much less pronounced compared with the range of past data. Thus, the observations demonstrate that the widespread and deep ozone depletion that characterizes the Antarctic ozone hole is a unique feature on the planet.atmosphere ͉ chemistry ͉ stratosphere ͉ trend

show abstract

“…In the 1980s, increased concern about stratospheric ozone depletion (Farman et al, 1985;Solomon et al, 1986) and its effect on the levels of UV radiation at the Earth's surface (Kerr and McElroy, 1993;Madronich et al, 1995;Zerefos, 2002) led to increased deployment of ground-based instruments worldwide (Fioletov et al, 1999), to monitor the TOC and the surface UV irradiance. Among these instruments, several Brewer spectrophotometers (Brewer, 1973;Kerr et al, 1985) were deployed at different locations including Thessaloniki, Greece, where the first commercially available singlemonochromator Brewer with serial number 005 (B005) was installed in 1982.…”

Section: Instrumentation and Datamentioning

confidence: 99%

Short- and long-term variability of spectral solar UV irradiance at Thessaloniki, Greece: effects of changes in aerosols, total ozone and clouds

et al. 2016

View full text Add to dashboard Cite

Abstract. In this study, we discuss the short-and the longterm variability of spectral UV irradiance at Thessaloniki, Greece, using a long, quality-controlled data set from two Brewer spectrophotometers. Long-term changes in spectral UV irradiance at 307.5, 324 and 350 nm for the period 1994-2014 are presented for different solar zenith angles and discussed in association with changes in total ozone column (TOC), aerosol optical depth (AOD) and cloudiness observed in the same period. Positive changes in annual mean anomalies of UV irradiance, ranging from 2 to 6 % per decade, have been detected both for clear-and all-sky conditions. The changes are generally greater for larger solar zenith angles and for shorter wavelengths. For clear-skies, these changes are, in most cases, statistically significant at the 95 % confidence limit. Decreases in the aerosol load and weakening of the attenuation by clouds lead to increases in UV irradiance in the summer, of 7-9 % per decade for 64 • solar zenith angle. The increasing TOC in winter counteracts the effect of decreasing AOD for this particular season, leading to small, statistically insignificant, negative long-term changes in irradiance at 307.5 nm. Annual mean UV irradiance levels are increasing from 1994 to 2006 and remain relatively stable thereafter, possibly due to the combined changes in the amount and optical properties of aerosols. However, no statistically significant corresponding turning point has been detected in the long-term changes of AOD. The absence of signatures of changes in AOD in the short-term variability of irradiance in the UV-A may have been caused by changes in the single scattering albedo of aerosols, which may counteract the effects of changes in AOD on irradiance. The anticorrelation between the year-to-year variability of the irradiance at 307.5 nm and TOC is clear and becomes clearer as the AOD decreases.

show abstract

An assessment of the world ground‐based total ozone network performance from the comparison with satellite data

Cited by 81 publications

References 21 publications

Total ozone and surface UV trends in the United Kingdom: 1979–2008

Total ozone and surface UV trends in the United Kingdom: 1979–2008

Contrasts between Antarctic and Arctic ozone depletion

Short- and long-term variability of spectral solar UV irradiance at Thessaloniki, Greece: effects of changes in aerosols, total ozone and clouds

Contact Info

Product

Resources

About