Measurements of Solar Ultraviolet Radiation at Barrow, Alaska; Summit Greenland; and Tiksi, Russia: a contribution to IASOA
Abstract
Solar ultraviolet (UV) radiation has been measured with high-resolution spectroradiometers at the IASOA observatories Barrow, Alaska, and Summit, Greenland, since 1991 and 2004, respectively. Instruments are part of the National Science Foundation's Ultraviolet Spectral Irradiance Monitoring Network (UVSIMN), which also operates similar systems in Antarctica. Data products include spectra of global (sun and sky) irradiance between 280 and 600 nm, time series of spectral irradiance at various wavelengths; integrals over several wavelength bands (e.g., UV-A, UV-B); biologically effective dose-rates calculated with a large (>15) number of action spectra; total ozone; effective surface albedo; cloud optical depth, actinic flux, and photolysis rate data for the reactions O3 → O(1D) + O2 and NO2 → NO + O(3P). The effects of total ozone, clouds, aerosols, and surface albedo on UV irradiance have been analyzed in detail at the two Arctic sites. This study also exploited aerosol optical depth measurements performed at Barrow by NOAA's Earth System Research Laboratory Global Monitoring Division (ESRL/GMD) and NASA's AERONET network. We are planning to integrate our UV measurements at Barrow and Summit into the framework of IASOA to take advantage of synergistic effects gained from coordinating the different measurement programs at the two sites. For example, UV measurements can be provided at sampling times of other IASOA projects. In addition, we hope to establish UV measurements at the IASOA observatory Tiksi, Russia, in the near future, to improve the understanding of the circum-polar distribution of solar UV radiation.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2008
- Bibcode:
- 2008AGUFM.A23F..06B
- Keywords:
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- 0360 Radiation: transmission and scattering;
- 0394 Instruments and techniques;
- 1610 Atmosphere (0315;
- 0325);
- 9315 Arctic region (0718;
- 4207)