European intercomparison of ultraviolet spectroradiometers

Gardiner, B. G.; Webb, Ann R.; Bais, Alkiviadis; Blumthaler, M.; Dirmhirn, Inge; Forster, Piers M.; Gillotay, D.; Henriksen, K.; Huber, M. C. E.; Kirsch, Peter; Simon, P. C.; Svenøe, T.; Weihs, Philipp; Zerefos, C. S.

doi:10.1080/09593339309385262

Cited by 53 publications

(46 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This year, a reference and arena algorithm was used to determine the reference spectrum as outlined in a paper by Gardiner et al [6]. This algorithm has been used successfully in several European Intercomparisons.…”

Section: Discussionmentioning

confidence: 99%

“…The two techniques are compared for spectral solar irradiance measured at 17 UTC, on DOY 172, 2003. The agreement among the convolved irradiances was described by their relative difference from the reference spectrum determined by the technique devised by Gardiner et al [6]. The relative standard deviation in the solar irradiance convolved with a triangular slit-scattering function between the spectral instruments was within ±3.0% at 310 nm (1-sigma) for high sun at 17 UTC, DOY 172.…”

Section: Discussionmentioning

confidence: 99%

“…Because there is a perceived advantage to being included in the reference in that it indicates a reliable and accurate instrument, it is preferable to have a method for determining the instruments to be included in the reference spectrum that is unbiased. In the organizational meeting prior to the start of the blind Intercomparison, the participants agreed to use a method developed by Gardiner et al [6] to determine the reference spectrum.…”

Section: Reference and Arena Algorithmmentioning

confidence: 99%

“…Using the Arena Algorithm and Reference Algorithm as defined can be very cumbersome and time consuming but has the necessary advantage of maintaining objectivity in the determination of the reference spectrum. An overview of the arena and reference algorithm as it pertains to the results of this Intercomparison are given in a NOAA Technical Memorandum [26], where an explanation of the formulas and procedures can be found in the paper by Gardiner et al [6]. The reference and arena set of instruments have been determined for DOY 167 and 172, 2003; which are the two days used in the solar irradiance comparisons given in section 6.…”

Section: Reference and Arena Algorithmmentioning

confidence: 99%

“…The arena algorithm considers different possible candidate arenas and evaluates them on a point basis. The diurnal observations are divided into seven time bands in the same manner as the original study [6], where the bands cover solar noon, low and moderate solar zenith angles. The instruments are required to have points greater than zero in the mandatory bands otherwise the instrument is excluded from the arena.…”

Section: Arena Algorithmmentioning

confidence: 99%

See 4 more Smart Citations

2003 North American interagency intercomparison of ultraviolet spectroradiometers: scanning and spectrograph instruments.

Lantz

2008

J. Appl. Remote Sens

View full text Add to dashboard Cite

Abstract. The fifth North American Intercomparison of Ultraviolet MonitoringSpectroradiometers was held June 13 to 21, 2003 at Table Mountain outside of Boulder, Colorado, USA. The main purpose of the Intercomparison was to assess the ability of spectroradiometers to accurately measure solar ultraviolet irradiance, and to compare the results between instruments of different monitoring networks. This Intercomparison was coordinated by NOAA and included participants from six national and international agencies. The UV measuring instruments included scanning spectroradiometers, spectrographs, and multi-filter radiometers. Synchronized spectral scans of the solar irradiance were performed between June 16 and 20, 2003. The spectral responsivities were determined for each instrument using the participants' lamps and calibration procedures and with NOAA/CUCF standard lamps. This paper covers the scanning spectroradiometers and the one spectrograph. The solar irradiance measurements from the different instruments were deconvolved using a high resolution extraterrestrial solar irradiance and reconvolved with a 1-nm triangular bandpass to account for differences in the bandwidths of the instruments. The measured solar irradiance from the spectroradiometers using the rivmSHIC algorithm on a clear-sky day on DOY 172 at 17.0 UTC (SZA = 30°) had a relative 1-σ standard deviation of +/-2.6 to 3.4% for 300-to 360-nm using the participants' calibration.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Reference and Arena Algorithmmentioning

confidence: 99%

Section: Reference and Arena Algorithmmentioning

confidence: 99%

Section: Arena Algorithmmentioning

confidence: 99%

See 3 more Smart Citations

2003 North American interagency intercomparison of ultraviolet spectroradiometers: scanning and spectrograph instruments.

Lantz

2008

J. Appl. Remote Sens

View full text Add to dashboard Cite

show abstract

A comparison of two radiation schemes for calculating ultraviolet radiation

Forster

Shine

1995

Quart J Royal Meteoro Soc

View full text Add to dashboard Cite

Increases in ultraviolet radiation (UV) caused by ozone depletion in the stratosphere are expected to have physiological effects on plants and animals. Biologists require that the UV data have high wavelength resolution to assess these effects adequately. Numerical simulations of scattering and absorption in the atmosphere provide a useful way of predicting the UV irradiance reaching the ground and the results from such radiative transfer calculations are presented. I k o different methods were used to calculate the diffuse irradiances: the Discrete-Ordinate (D-0) method and the Delta-Eddington (D-E) approximation. Surface UV irradiances for a wide variety of atmospheric conditions, obtained with the D -0 method were compared with those obtained using the D-E approximation to assess how changes in tropospheric aerosol and cloud affect the accuracy of the D-E approximation. Stratospheric aerosol has been shown to be capable of increasing the UV irradiances at the ground, the magnitude of these increases depending heavily on the absorption by ozone of multiply-scattered photons. The prediction of these increases by means of numerical models provides a good test of the accuracy of the radiative transfer approximations used. It is shown that the D-E approximation appears to be deficient for the prediction of surface irradiance at high spectral resolution, under certain circumstances.

show abstract

The EC’s Step UV-B Program

Webb

1994

Stratospheric Ozone Depletion/Uv-B Radiation in the Biosphere

View full text Add to dashboard Cite

European intercomparison of ultraviolet spectroradiometers

Cited by 53 publications

References 3 publications

2003 North American interagency intercomparison of ultraviolet spectroradiometers: scanning and spectrograph instruments.

2003 North American interagency intercomparison of ultraviolet spectroradiometers: scanning and spectrograph instruments.

A comparison of two radiation schemes for calculating ultraviolet radiation

The EC’s Step UV-B Program

Contact Info

Product

Resources

About