UV Irradiance and Albedo at Union Glacier Camp (Antarctica): A Case Study

作者：Cordero Raul R^*; Damiani Alessandro; Ferrer Jorge; Jorquera Jose; Tobar Mario; Labbe Fernando; Carrasco Jorge; Laroze David

来源：PLos One, 2014, 9(3): e90705.

DOI：10.1371/journal.pone.0090705

We report on the first spectral measurements of ultraviolet (UV) irradiance and the albedo at a Camp located in the southern Ellsworth Mountains on the broad expanse of Union Glacier (700 m altitude, 79 degrees 46' S; 82 degrees 52'W); about 1,000 km from the South Pole. The measurements were carried out by using a double monochromator-based spectroradiometer during a campaign (in December 2012) meant to weight up the effect of the local albedo on the UV irradiance. We found that the albedo measured at noon was about 0.95 in the UV and the visible part of the spectrum. This high surface reflectivity led to enhancements in the UV index under cloudless conditions of about 50% in comparison with snow free surfaces. Spectral measurements carried out elsewhere as well as estimates retrieved from the Ozone Monitoring Instrument (OMI) were used for further comparisons.

• 出版日期2014-3-5