Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Variability of spectral UV irradiance at Thessaloniki, Greece, from 15 years of measurements

[+] Author Affiliations
Katerina Garane, Alkiviadis Bais, Kleareti Tourpali, Charicklea Meleti, Stylianos Kazadzis

Aristotle Univ. of Thessaloniki (Greece)

Christos Zerefos

National and Kapodestrian Univ. of Athens (Greece)

Proc. SPIE 5886, Ultraviolet Ground- and Space-based Measurements, Models, and Effects V, 588606 (February 15, 2007); doi:10.1117/12.619793
Text Size: A A A
From Conference Volume 5886

  • Ultraviolet Ground- and Space-based Measurements, Models, and Effects V
  • Germar Bernhard; James R. Slusser; Jay R. Herman; Wei Gao
  • San Diego, California, USA | July 31, 2005

abstract

The temporal variability of global ultraviolet solar spectral irradiance measured regularly at Thessaloniki, Greece during the last 15 years is presented. The measurements were conducted by a single- and a double-monochromator Brewer spectroradiometers which operate at the Laboratory of Atmospheric Physics since 1989 and 1993, respectively. Recently the entire series of measurements was re-evaluated and quality controlled, by revising the calibration history of the two instruments and by comparing these measurements with those obtained by a collocated erythemal radiometer and a pyranometer. In addition, the spectral measurements were corrected for the angular response error of each instrument and for the effect of temperature variations. The longest of the re-evaluated series, which was obtained by the single monochromator, was statistically analyzed to derive estimates of the long-term changes and variability of UV irradiance radiation. Daily integrals were derived with the aid of broadband measurements which were used to simulate the diurnal variation of the spectral irradiance at one minute increments. The effect of clouds and solar zenith angle on the log term variability of UV irradiance are also investigated. Finally, signals of inter-annual natural variations and oscillations on this data set are explored and removed in an attempt to attribute the observed variability to different factors or mechanisms and investigate their effects on the long term changes of UV irradiance at the ground. All long term changes that were calculated have positive signs and vary according to wavelength solar zenith angle and the period of data. Monthly erythemal irradiance increases in the 1990's by about 6%, possibly as a result of reduction of clouds and aerosols.

© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Katerina Garane ; Alkiviadis Bais ; Kleareti Tourpali ; Charicklea Meleti ; Christos Zerefos, et al.
"Variability of spectral UV irradiance at Thessaloniki, Greece, from 15 years of measurements", Proc. SPIE 5886, Ultraviolet Ground- and Space-based Measurements, Models, and Effects V, 588606 (February 15, 2007); doi:10.1117/12.619793; http://dx.doi.org/10.1117/12.619793


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.